Update change_scala_version.py to also change scala.version property (#9897)

* [jvm-packages] Fix POM for xgboost-jvm metapackage

* Add script for updating the Scala version

.gitmodules

@@ -5,6 +5,3 @@
 [submodule "gputreeshap"]
 	path = gputreeshap
 	url = https://github.com/rapidsai/gputreeshap.git
-[submodule "rocgputreeshap"]
-	path = rocgputreeshap
-	url = https://github.com/ROCmSoftwarePlatform/rocgputreeshap

CMakeLists.txt

@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.18 FATAL_ERROR)
-project(xgboost LANGUAGES CXX C VERSION 2.0.2)
+project(xgboost LANGUAGES CXX C VERSION 2.0.3)
 include(cmake/Utils.cmake)
 list(APPEND CMAKE_MODULE_PATH "${xgboost_SOURCE_DIR}/cmake/modules")
 cmake_policy(SET CMP0022 NEW)
@@ -58,7 +58,7 @@ option(ENABLE_ALL_WARNINGS "Enable all compiler warnings. Only effective for GCC
 option(LOG_CAPI_INVOCATION "Log all C API invocations for debugging" OFF)
 option(GOOGLE_TEST "Build google tests" OFF)
 option(USE_DMLC_GTEST "Use google tests bundled with dmlc-core submodule" OFF)
-option(USE_DEVICE_DEBUG "Generate CUDA/HIP device debug info." OFF)
+option(USE_DEVICE_DEBUG "Generate CUDA device debug info." OFF)
 option(USE_NVTX "Build with cuda profiling annotations. Developers only." OFF)
 set(NVTX_HEADER_DIR "" CACHE PATH "Path to the stand-alone nvtx header")
 option(RABIT_MOCK "Build rabit with mock" OFF)
@@ -71,10 +71,6 @@ option(USE_NCCL  "Build with NCCL to enable distributed GPU support." OFF)
 option(BUILD_WITH_SHARED_NCCL "Build with shared NCCL library." OFF)
 set(GPU_COMPUTE_VER "" CACHE STRING
   "Semicolon separated list of compute versions to be built against, e.g. '35;61'")
-## HIP
-option(USE_HIP  "Build with GPU acceleration" OFF)
-option(USE_RCCL "Build with RCCL to enable distributed GPU support." OFF)
-option(BUILD_WITH_SHARED_RCCL "Build with shared RCCL library." OFF)
 ## Copied From dmlc
 option(USE_HDFS "Build with HDFS support" OFF)
 option(USE_AZURE "Build with AZURE support" OFF)
@@ -97,7 +93,6 @@ option(ADD_PKGCONFIG "Add xgboost.pc into system." ON)
 if (USE_DEBUG_OUTPUT AND (NOT (CMAKE_BUILD_TYPE MATCHES Debug)))
   message(SEND_ERROR "Do not enable `USE_DEBUG_OUTPUT' with release build.")
 endif (USE_DEBUG_OUTPUT AND (NOT (CMAKE_BUILD_TYPE MATCHES Debug)))
-
 if (USE_NCCL AND NOT (USE_CUDA))
   message(SEND_ERROR "`USE_NCCL` must be enabled with `USE_CUDA` flag.")
 endif (USE_NCCL AND NOT (USE_CUDA))
@@ -107,17 +102,6 @@ endif (USE_DEVICE_DEBUG AND NOT (USE_CUDA))
 if (BUILD_WITH_SHARED_NCCL AND (NOT USE_NCCL))
   message(SEND_ERROR "Build XGBoost with -DUSE_NCCL=ON to enable BUILD_WITH_SHARED_NCCL.")
 endif (BUILD_WITH_SHARED_NCCL AND (NOT USE_NCCL))
-
-if (USE_RCCL AND NOT (USE_HIP))
-  message(SEND_ERROR "`USE_RCCL` must be enabled with `USE_HIP` flag.")
-endif (USE_RCCL AND NOT (USE_HIP))
-if (USE_DEVICE_DEBUG AND NOT (USE_HIP))
-  message(SEND_ERROR "`USE_DEVICE_DEBUG` must be enabled with `USE_HIP` flag.")
-endif (USE_DEVICE_DEBUG AND NOT (USE_HIP))
-if (BUILD_WITH_SHARED_RCCL AND (NOT USE_RCCL))
-  message(SEND_ERROR "Build XGBoost with -DUSE_RCCL=ON to enable BUILD_WITH_SHARED_RCCL.")
-endif (BUILD_WITH_SHARED_RCCL AND (NOT USE_RCCL))
-
 if (JVM_BINDINGS AND R_LIB)
   message(SEND_ERROR "`R_LIB' is not compatible with `JVM_BINDINGS' as they both have customized configurations.")
 endif (JVM_BINDINGS AND R_LIB)
@@ -131,15 +115,9 @@ endif (USE_AVX)
 if (PLUGIN_LZ4)
   message(SEND_ERROR  "The option 'PLUGIN_LZ4' is removed from XGBoost.")
 endif (PLUGIN_LZ4)
-
 if (PLUGIN_RMM AND NOT (USE_CUDA))
   message(SEND_ERROR "`PLUGIN_RMM` must be enabled with `USE_CUDA` flag.")
 endif (PLUGIN_RMM AND NOT (USE_CUDA))
-
-if (PLUGIN_RMM AND NOT (USE_HIP))
-  message(SEND_ERROR "`PLUGIN_RMM` must be enabled with `USE_HIP` flag.")
-endif (PLUGIN_RMM AND NOT (USE_HIP))
-
 if (PLUGIN_RMM AND NOT ((CMAKE_CXX_COMPILER_ID STREQUAL "Clang") OR (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")))
   message(SEND_ERROR "`PLUGIN_RMM` must be used with GCC or Clang compiler.")
 endif (PLUGIN_RMM AND NOT ((CMAKE_CXX_COMPILER_ID STREQUAL "Clang") OR (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")))
@@ -192,24 +170,6 @@ if (USE_CUDA)
   find_package(CUDAToolkit REQUIRED)
 endif (USE_CUDA)
 
-if (USE_HIP)
-  set(USE_OPENMP ON CACHE BOOL "HIP requires OpenMP" FORCE)
-  # `export CXX=' is ignored by CMake HIP.
-  set(CMAKE_HIP_HOST_COMPILER ${CMAKE_CXX_COMPILER})
-  message(STATUS "Configured HIP host compiler: ${CMAKE_HIP_HOST_COMPILER}")
-
-  enable_language(HIP)
-  find_package(hip REQUIRED)
-  find_package(rocthrust REQUIRED)
-  find_package(hipcub REQUIRED)
-
-  set(CMAKE_HIP_FLAGS "${CMAKE_HIP_FLAGS} -I${HIP_INCLUDE_DIRS} -I${HIP_INCLUDE_DIRS}/hip")
-  set(CMAKE_HIP_FLAGS "${CMAKE_HIP_FLAGS} -Wunused-result -w")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D__HIP_PLATFORM_AMD__")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -I${HIP_INCLUDE_DIRS}")
-  add_subdirectory(${PROJECT_SOURCE_DIR}/rocgputreeshap)
-endif (USE_HIP)
-
 if (FORCE_COLORED_OUTPUT AND (CMAKE_GENERATOR STREQUAL "Ninja") AND
     ((CMAKE_CXX_COMPILER_ID STREQUAL "GNU") OR
       (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")))
@@ -249,10 +209,6 @@ if (USE_NCCL)
   find_package(Nccl REQUIRED)
 endif (USE_NCCL)
 
-if (USE_RCCL)
-  find_package(rccl REQUIRED)
-endif (USE_RCCL)
-
 # dmlc-core
 msvc_use_static_runtime()
 if (FORCE_SHARED_CRT)

R-package/DESCRIPTION

@@ -1,8 +1,8 @@
 Package: xgboost
 Type: Package
 Title: Extreme Gradient Boosting
-Version: 2.0.2.1
-Date: 2023-10-12
+Version: 2.0.3.1
+Date: 2023-12-14
 Authors@R: c(
   person("Tianqi", "Chen", role = c("aut"),
          email = "tianqi.tchen@gmail.com"),

R-package/configure

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.71 for xgboost 2.0.2.
+# Generated by GNU Autoconf 2.71 for xgboost 2.0.3.
 #
 #
 # Copyright (C) 1992-1996, 1998-2017, 2020-2021 Free Software Foundation,
@@ -607,8 +607,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='xgboost'
 PACKAGE_TARNAME='xgboost'
-PACKAGE_VERSION='2.0.2'
-PACKAGE_STRING='xgboost 2.0.2'
+PACKAGE_VERSION='2.0.3'
+PACKAGE_STRING='xgboost 2.0.3'
 PACKAGE_BUGREPORT=''
 PACKAGE_URL=''
 
@@ -1225,7 +1225,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures xgboost 2.0.2 to adapt to many kinds of systems.
+\`configure' configures xgboost 2.0.3 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1287,7 +1287,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of xgboost 2.0.2:";;
+     short | recursive ) echo "Configuration of xgboost 2.0.3:";;
    esac
   cat <<\_ACEOF
 
@@ -1367,7 +1367,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-xgboost configure 2.0.2
+xgboost configure 2.0.3
 generated by GNU Autoconf 2.71
 
 Copyright (C) 2021 Free Software Foundation, Inc.
@@ -1533,7 +1533,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by xgboost $as_me 2.0.2, which was
+It was created by xgboost $as_me 2.0.3, which was
 generated by GNU Autoconf 2.71.  Invocation command line was
 
   $ $0$ac_configure_args_raw
@@ -3412,7 +3412,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by xgboost $as_me 2.0.2, which was
+This file was extended by xgboost $as_me 2.0.3, which was
 generated by GNU Autoconf 2.71.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -3467,7 +3467,7 @@ ac_cs_config_escaped=`printf "%s\n" "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
-xgboost config.status 2.0.2
+xgboost config.status 2.0.3
 configured by $0, generated by GNU Autoconf 2.71,
   with options \\"\$ac_cs_config\\"
 

R-package/configure.ac

@@ -2,7 +2,7 @@
 
 AC_PREREQ(2.69)
 
-AC_INIT([xgboost],[2.0.2],[],[xgboost],[])
+AC_INIT([xgboost],[2.0.3],[],[xgboost],[])
 
 : ${R_HOME=`R RHOME`}
 if test -z "${R_HOME}"; then

R-package/src/xgboost_custom.cc

@@ -32,7 +32,7 @@ namespace common {
 bool CheckNAN(double v) {
   return ISNAN(v);
 }
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 double LogGamma(double v) {
   return lgammafn(v);
 }

cmake/Utils.cmake

@@ -181,23 +181,6 @@ function(xgboost_set_cuda_flags target)
     CUDA_RUNTIME_LIBRARY Static)
 endfunction(xgboost_set_cuda_flags)
 
-# Set HIP related flags to target.
-function(xgboost_set_hip_flags target)
-  if (USE_DEVICE_DEBUG)
-    target_compile_options(${target} PRIVATE
-      $<$<AND:$<CONFIG:DEBUG>,$<COMPILE_LANGUAGE:HIP>>:-G>)
-  endif (USE_DEVICE_DEBUG)
-
-  target_compile_definitions(${target} PRIVATE -DXGBOOST_USE_HIP=1)
-  target_include_directories(${target} PRIVATE ${xgboost_SOURCE_DIR}/rocgputreeshap)
-  target_include_directories(${target} PRIVATE ${xgboost_SOURCE_DIR}/warp-primitives/include)
-
-  set_target_properties(${target} PROPERTIES
-    HIP_STANDARD 17
-    HIP_STANDARD_REQUIRED ON
-    HIP_SEPARABLE_COMPILATION OFF)
-endfunction(xgboost_set_hip_flags)
-
 macro(xgboost_link_nccl target)
   if (BUILD_STATIC_LIB)
     target_include_directories(${target} PUBLIC ${NCCL_INCLUDE_DIR})
@@ -210,20 +193,6 @@ macro(xgboost_link_nccl target)
   endif (BUILD_STATIC_LIB)
 endmacro(xgboost_link_nccl)
 
-macro(xgboost_link_rccl target)
-  if(BUILD_STATIC_LIB)
-    target_include_directories(${target} PUBLIC ${RCCL_INCLUDE_DIR}/rccl)
-    target_compile_definitions(${target} PUBLIC -DXGBOOST_USE_RCCL=1)
-    target_link_directories(${target} PUBLIC ${HIP_LIB_INSTALL_DIR})
-    target_link_libraries(${target} PUBLIC ${RCCL_LIBRARY})
-  else()
-    target_include_directories(${target} PRIVATE ${RCCL_INCLUDE_DIR}/rccl)
-    target_compile_definitions(${target} PRIVATE -DXGBOOST_USE_RCCL=1)
-    target_link_directories(${target} PUBLIC ${HIP_LIB_INSTALL_DIR})
-    target_link_libraries(${target} PRIVATE ${RCCL_LIBRARY})
-  endif()
-endmacro()
-
 # compile options
 macro(xgboost_target_properties target)
   set_target_properties(${target} PROPERTIES
@@ -246,10 +215,6 @@ macro(xgboost_target_properties target)
       -Xcompiler=-Wall -Xcompiler=-Wextra -Xcompiler=-Wno-expansion-to-defined,
       -Wall -Wextra -Wno-expansion-to-defined>
     )
-    target_compile_options(${target} PUBLIC
-       $<IF:$<COMPILE_LANGUAGE:HIP>,
-      -Wall -Wextra >
-    )
   endif(ENABLE_ALL_WARNINGS)
 
   target_compile_options(${target}
@@ -318,10 +283,6 @@ macro(xgboost_target_link_libraries target)
     target_link_libraries(${target} PUBLIC CUDA::cudart_static)
   endif (USE_CUDA)
 
-  if (USE_HIP)
-    xgboost_set_hip_flags(${target})
-  endif (USE_HIP)
-
   if (PLUGIN_RMM)
     target_link_libraries(${target} PRIVATE rmm::rmm)
   endif (PLUGIN_RMM)
@@ -330,10 +291,6 @@ macro(xgboost_target_link_libraries target)
     xgboost_link_nccl(${target})
   endif (USE_NCCL)
 
-  if(USE_RCCL)
-    xgboost_link_rccl(${target})
-  endif()
-
   if (USE_NVTX)
     target_link_libraries(${target} PRIVATE CUDA::nvToolsExt)
   endif (USE_NVTX)

cmake/xgboost-config.cmake.in

@@ -3,8 +3,6 @@
 set(USE_OPENMP @USE_OPENMP@)
 set(USE_CUDA @USE_CUDA@)
 set(USE_NCCL @USE_NCCL@)
-set(USE_HIP @USE_HIP@)
-set(USE_RCCL @USE_RCCL@)
 set(XGBOOST_BUILD_STATIC_LIB @BUILD_STATIC_LIB@)
 
 include(CMakeFindDependencyMacro)
@@ -17,9 +15,6 @@ if (XGBOOST_BUILD_STATIC_LIB)
   if(USE_CUDA)
     find_dependency(CUDA)
   endif()
-  if(USE_HIP)
-      find_dependency(HIP)
-  endif()
   # nccl should be linked statically if xgboost is built as static library.
 endif (XGBOOST_BUILD_STATIC_LIB)
 

demo/CLI/regression/runexp.sh

@@ -4,13 +4,13 @@ python mapfeat.py
 # split train and test
 python mknfold.py machine.txt 1
 # training and output the models
-../../../xgboost machine.conf
+../../xgboost machine.conf
 # output predictions of test data
-../../../xgboost machine.conf task=pred model_in=0002.model
+../../xgboost machine.conf task=pred model_in=0002.model
 # print the boosters of 0002.model in dump.raw.txt
-../../../xgboost machine.conf task=dump model_in=0002.model name_dump=dump.raw.txt
+../../xgboost machine.conf task=dump model_in=0002.model name_dump=dump.raw.txt
 # print the boosters of 0002.model in dump.nice.txt with feature map
-../../../xgboost machine.conf task=dump model_in=0002.model fmap=featmap.txt name_dump=dump.nice.txt 
+../../xgboost machine.conf task=dump model_in=0002.model fmap=featmap.txt name_dump=dump.nice.txt 
 
 # cat the result
 cat dump.nice.txt

dev/change_scala_version.py

@@ -0,0 +1,79 @@
+import argparse
+import pathlib
+import re
+import shutil
+
+
+def main(args):
+    if args.scala_version == "2.12":
+        scala_ver = "2.12"
+        scala_patchver = "2.12.18"
+    elif args.scala_version == "2.13":
+        scala_ver = "2.13"
+        scala_patchver = "2.13.11"
+    else:
+        raise ValueError(f"Unsupported Scala version: {args.scala_version}")
+
+    # Clean artifacts
+    if args.purge_artifacts:
+        for target in pathlib.Path("jvm-packages/").glob("**/target"):
+            if target.is_dir():
+                print(f"Removing {target}...")
+                shutil.rmtree(target)
+
+    # Update pom.xml
+    for pom in pathlib.Path("jvm-packages/").glob("**/pom.xml"):
+        print(f"Updating {pom}...")
+        with open(pom, "r", encoding="utf-8") as f:
+            lines = f.readlines()
+        with open(pom, "w", encoding="utf-8") as f:
+            replaced_scalaver = False
+            replaced_scala_binver = False
+            for line in lines:
+                for artifact in [
+                    "xgboost-jvm",
+                    "xgboost4j",
+                    "xgboost4j-gpu",
+                    "xgboost4j-spark",
+                    "xgboost4j-spark-gpu",
+                    "xgboost4j-flink",
+                    "xgboost4j-example",
+                ]:
+                    line = re.sub(
+                        f"<artifactId>{artifact}_[0-9\\.]*",
+                        f"<artifactId>{artifact}_{scala_ver}",
+                        line,
+                    )
+                # Only replace the first occurrence of scala.version
+                if not replaced_scalaver:
+                    line, nsubs = re.subn(
+                        r"<scala.version>[0-9\.]*",
+                        f"<scala.version>{scala_patchver}",
+                        line,
+                    )
+                    if nsubs > 0:
+                        replaced_scalaver = True
+                # Only replace the first occurrence of scala.binary.version
+                if not replaced_scala_binver:
+                    line, nsubs = re.subn(
+                        r"<scala.binary.version>[0-9\.]*",
+                        f"<scala.binary.version>{scala_ver}",
+                        line,
+                    )
+                    if nsubs > 0:
+                        replaced_scala_binver = True
+                f.write(line)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--purge-artifacts", action="store_true")
+    parser.add_argument(
+        "--scala-version",
+        type=str,
+        required=True,
+        help="Version of Scala to use in the JVM packages",
+        choices=["2.12", "2.13"],
+    )
+    parsed_args = parser.parse_args()
+    main(parsed_args)

dev/prepare_jvm_release.py

@@ -2,7 +2,6 @@ import argparse
 import errno
 import glob
 import os
-import platform
 import re
 import shutil
 import subprocess
@@ -88,10 +87,6 @@ def main():
         help="Version of the release being prepared",
     )
     args = parser.parse_args()
-
-    if sys.platform != "darwin" or platform.machine() != "arm64":
-        raise NotImplementedError("Please run this script using an M1 Mac")
-
     version = args.release_version
     expected_git_tag = "v" + version
     current_git_tag = get_current_git_tag()
@@ -141,6 +136,7 @@ def main():
             ("linux", "x86_64"),
             ("windows", "x86_64"),
             ("macos", "x86_64"),
+            ("macos", "aarch64"),
         ]:
             output_dir = f"xgboost4j/src/main/resources/lib/{os_ident}/{arch}"
             maybe_makedirs(output_dir)
@@ -164,6 +160,10 @@ def main():
             url=f"{nightly_bucket_prefix}/{git_branch}/libxgboost4j/libxgboost4j_{commit_hash}.dylib",
             filename="xgboost4j/src/main/resources/lib/macos/x86_64/libxgboost4j.dylib",
         )
+        retrieve(
+            url=f"{nightly_bucket_prefix}/{git_branch}/libxgboost4j/libxgboost4j_m1_{commit_hash}.dylib",
+            filename="xgboost4j/src/main/resources/lib/macos/aarch64/libxgboost4j.dylib",
+        )
 
         with tempfile.TemporaryDirectory() as tempdir:
             # libxgboost4j.so for Linux x86_64, CPU only
@@ -211,9 +211,14 @@ def main():
         "https://central.sonatype.org/publish/publish-maven/"
     )
     print(
-        "3. Now on a M1 Mac machine, run the following to build Scala 2.12 artifacts:"
+        "3. Now on a Linux machine, run the following to build Scala 2.12 artifacts. "
+        "Make sure to use an Internet connection with fast upload speed:"
+    )
+    print(
+        "   # Skip native build, since we have all needed native binaries from CI\n"
+        "   export MAVEN_SKIP_NATIVE_BUILD=1\n"
+        "   GPG_TTY=$(tty) mvn deploy -Prelease -DskipTests"
     )
-    print("   GPG_TTY=$(tty) mvn deploy -Prelease -DskipTests")
     print(
         "4. Log into https://oss.sonatype.org/. On the left menu panel, click Staging "
         "Repositories. Visit the URL https://oss.sonatype.org/content/repositories/mldmlc-xxxx "
@@ -221,11 +226,14 @@ def main():
         "artifacts to the Maven Central repository. The top-level metapackage should be "
         "named xgboost-jvm_2.12."
     )
-    print("5. Remove the Scala 2.12 artifacts and build Scala 2.13 artifacts:")
-    print("   rm -rf targets/")
-    print("   GPG_TTY=$(tty) mvn deploy -Prelease-cpu-only,scala-2.13 -DskipTests")
     print(
-        "6. Go to https://oss.sonatype.org/ to release the Scala 2.13 artifacts."
+        "5. Remove the Scala 2.12 artifacts and build Scala 2.13 artifacts:\n"
+        "   export MAVEN_SKIP_NATIVE_BUILD=1\n"
+        "   python dev/change_scala_version.py --scala-version 2.13 --purge-artifacts\n"
+        "   GPG_TTY=$(tty) mvn deploy -Prelease-cpu-only,scala-2.13 -DskipTests"
+    )
+    print(
+        "6. Go to https://oss.sonatype.org/ to release the Scala 2.13 artifacts. "
         "The top-level metapackage should be named xgboost-jvm_2.13."
     )
 

include/xgboost/base.h

@@ -58,19 +58,19 @@
 /*!
  * \brief Tag function as usable by device
  */
-#if defined (__CUDA__) || defined(__NVCC__) || defined(__HIPCC__)
+#if defined (__CUDA__) || defined(__NVCC__)
 #define XGBOOST_DEVICE __host__ __device__
 #else
 #define XGBOOST_DEVICE
-#endif  // defined (__CUDA__) || defined(__NVCC__) || defined(__HIPCC__)
+#endif  // defined (__CUDA__) || defined(__NVCC__)
 
-#if defined(__CUDA__) || defined(__CUDACC__) || defined(__HIPCC__)
+#if defined(__CUDA__) || defined(__CUDACC__)
 #define XGBOOST_HOST_DEV_INLINE XGBOOST_DEVICE __forceinline__
 #define XGBOOST_DEV_INLINE __device__ __forceinline__
 #else
 #define XGBOOST_HOST_DEV_INLINE
 #define XGBOOST_DEV_INLINE
-#endif  // defined(__CUDA__) || defined(__CUDACC__) || defined(__HIPCC__)
+#endif  // defined(__CUDA__) || defined(__CUDACC__)
 
 // These check are for Makefile.
 #if !defined(XGBOOST_MM_PREFETCH_PRESENT) && !defined(XGBOOST_BUILTIN_PREFETCH_PRESENT)
@@ -274,8 +274,8 @@ class GradientPairInt64 {
   GradientPairInt64(GradientPairInt64 const &g) = default;
   GradientPairInt64 &operator=(GradientPairInt64 const &g) = default;
 
-  [[nodiscard]] XGBOOST_DEVICE T GetQuantisedGrad() const { return grad_; }
-  [[nodiscard]] XGBOOST_DEVICE T GetQuantisedHess() const { return hess_; }
+  XGBOOST_DEVICE [[nodiscard]] T GetQuantisedGrad() const { return grad_; }
+  XGBOOST_DEVICE [[nodiscard]] T GetQuantisedHess() const { return hess_; }
 
   XGBOOST_DEVICE GradientPairInt64 &operator+=(const GradientPairInt64 &rhs) {
     grad_ += rhs.grad_;

include/xgboost/host_device_vector.h

@@ -58,11 +58,11 @@
 
 namespace xgboost {
 
-#if defined(__CUDACC__) || defined(__HIPCC__)
+#ifdef __CUDACC__
 // Sets a function to call instead of cudaSetDevice();
 // only added for testing
 void SetCudaSetDeviceHandler(void (*handler)(int));
-#endif  // __CUDACC__ || __HIPCC__
+#endif  // __CUDACC__
 
 template <typename T> struct HostDeviceVectorImpl;
 

include/xgboost/linalg.h

@@ -30,11 +30,11 @@
 
 // decouple it from xgboost.
 #ifndef LINALG_HD
-#if defined(__CUDA__) || defined(__NVCC__) || defined(__HIPCC__)
+#if defined(__CUDA__) || defined(__NVCC__)
 #define LINALG_HD __host__ __device__
 #else
 #define LINALG_HD
-#endif  // defined (__CUDA__) || defined(__NVCC__) || defined(__HIPCC__)
+#endif  // defined (__CUDA__) || defined(__NVCC__)
 #endif  // LINALG_HD
 
 namespace xgboost::linalg {
@@ -118,7 +118,7 @@ using IndexToTag = std::conditional_t<std::is_integral<RemoveCRType<S>>::value,
 
 template <int32_t n, typename Fn>
 LINALG_HD constexpr auto UnrollLoop(Fn fn) {
-#if defined(__CUDA_ARCH__) || defined(__HIPCC__)
+#if defined __CUDA_ARCH__
 #pragma unroll n
 #endif  // defined __CUDA_ARCH__
   for (int32_t i = 0; i < n; ++i) {
@@ -136,7 +136,7 @@ int32_t NativePopc(T v) {
 inline LINALG_HD int Popc(uint32_t v) {
 #if defined(__CUDA_ARCH__)
   return __popc(v);
-#elif defined(__GNUC__) || defined(__clang__) || defined(__HIPCC__)
+#elif defined(__GNUC__) || defined(__clang__)
   return __builtin_popcount(v);
 #elif defined(_MSC_VER)
   return __popcnt(v);
@@ -148,7 +148,7 @@ inline LINALG_HD int Popc(uint32_t v) {
 inline LINALG_HD int Popc(uint64_t v) {
 #if defined(__CUDA_ARCH__)
   return __popcll(v);
-#elif defined(__GNUC__) || defined(__clang__) || defined(__HIPCC__)
+#elif defined(__GNUC__) || defined(__clang__)
   return __builtin_popcountll(v);
 #elif defined(_MSC_VER) && defined(_M_X64)
   return __popcnt64(v);

include/xgboost/span.h

@@ -41,9 +41,7 @@
 
 #if defined(__CUDACC__)
 #include <cuda_runtime.h>
-#elif defined(__HIPCC__)
-#include <hip/hip_runtime.h>
-#endif
+#endif  // defined(__CUDACC__)
 
 /*!
  * The version number 1910 is picked up from GSL.
@@ -106,42 +104,7 @@ namespace common {
 
 #define SPAN_CHECK KERNEL_CHECK
 
-#elif defined(__HIPCC__)
-// Usual logging facility is not available inside device code.
-
-#if defined(_MSC_VER)
-
-// Windows HIP doesn't have __assert_fail.
-#define HIP_KERNEL_CHECK(cond)           \
-  do {                                    \
-    if (XGBOOST_EXPECT(!(cond), false)) { \
-      __builtin_trap();                           \
-    }                                     \
-  } while (0)
-
-#else  // defined(_MSC_VER)
-
-#define __ASSERT_STR_HELPER(x) #x
-
-#if 0
-#define HIP_KERNEL_CHECK(cond)  \
-  (XGBOOST_EXPECT((cond), true) \
-       ? static_cast<void>(0)   \
-       : __assert_fail(__ASSERT_STR_HELPER((cond)), __FILE__, __LINE__, __PRETTY_FUNCTION__))
-#else
-#define HIP_KERNEL_CHECK(cond)  \
-  (XGBOOST_EXPECT((cond), true) \
-       ? static_cast<void>(0)   \
-       : __builtin_trap())
-#endif
-
-#endif  // defined(_MSC_VER)
-
-#define KERNEL_CHECK HIP_KERNEL_CHECK
-
-#define SPAN_CHECK KERNEL_CHECK
-
-#else  // ------------------------------ not CUDA or HIP ----------------------------
+#else  // ------------------------------ not CUDA ----------------------------
 
 #if defined(XGBOOST_STRICT_R_MODE) && XGBOOST_STRICT_R_MODE == 1
 
@@ -157,7 +120,7 @@ namespace common {
 
 #endif  // defined(XGBOOST_STRICT_R_MODE)
 
-#endif  // __CUDA_ARCH__ || __HIPCC__
+#endif  // __CUDA_ARCH__
 
 #define SPAN_LT(lhs, rhs) SPAN_CHECK((lhs) < (rhs))
 
@@ -354,7 +317,7 @@ struct IsSpanOracle<Span<T, Extent>> : std::true_type {};
 template <class T>
 struct IsSpan : public IsSpanOracle<typename std::remove_cv<T>::type> {};
 
-// Re-implement std algorithms here to adopt CUDA/HIP
+// Re-implement std algorithms here to adopt CUDA.
 template <typename T>
 struct Less {
   XGBOOST_DEVICE constexpr bool operator()(const T& _x, const T& _y) const {

include/xgboost/version_config.h

@@ -6,6 +6,6 @@
 
 #define XGBOOST_VER_MAJOR 2  /* NOLINT */
 #define XGBOOST_VER_MINOR 0  /* NOLINT */
-#define XGBOOST_VER_PATCH 2  /* NOLINT */
+#define XGBOOST_VER_PATCH 3  /* NOLINT */
 
 #endif  // XGBOOST_VERSION_CONFIG_H_

jvm-packages/CMakeLists.txt

@@ -9,11 +9,6 @@ if (USE_CUDA)
     ${PROJECT_SOURCE_DIR}/jvm-packages/xgboost4j-gpu/src/native/xgboost4j-gpu.cu)
 endif (USE_CUDA)
 
-if (USE_HIP)
-  list(APPEND JVM_SOURCES
-    ${PROJECT_SOURCE_DIR}/jvm-packages/xgboost4j-gpu/src/native/xgboost4j-gpu.hip)
-endif (USE_HIP)
-
 add_library(xgboost4j SHARED ${JVM_SOURCES} ${XGBOOST_OBJ_SOURCES})
 
 if (ENABLE_ALL_WARNINGS)

jvm-packages/create_jni.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python
-import errno
 import argparse
+import errno
 import glob
 import os
 import platform
@@ -19,13 +19,10 @@ CONFIG = {
     "USE_HDFS": "OFF",
     "USE_AZURE": "OFF",
     "USE_S3": "OFF",
-
     "USE_CUDA": "OFF",
     "USE_NCCL": "OFF",
-    "USE_HIP": "OFF",
-    "USE_RCCL": "OFF",
     "JVM_BINDINGS": "ON",
-    "LOG_CAPI_INVOCATION": "OFF"
+    "LOG_CAPI_INVOCATION": "OFF",
 }
 
 
@@ -72,27 +69,22 @@ def normpath(path):
         return normalized
 
 
-if __name__ == "__main__":
-    parser = argparse.ArgumentParser()
-    parser.add_argument('--log-capi-invocation', type=str, choices=['ON', 'OFF'], default='OFF')
-    parser.add_argument('--use-cuda', type=str, choices=['ON', 'OFF'], default='OFF')
-    parser.add_argument('--use-hip', type=str, choices=['ON', 'OFF'], default='OFF')
-    cli_args = parser.parse_args()
-
+def native_build(args):
     if sys.platform == "darwin":
         # Enable of your compiler supports OpenMP.
         CONFIG["USE_OPENMP"] = "OFF"
-        os.environ["JAVA_HOME"] = subprocess.check_output(
-            "/usr/libexec/java_home").strip().decode()
+        os.environ["JAVA_HOME"] = (
+            subprocess.check_output("/usr/libexec/java_home").strip().decode()
+        )
 
     print("building Java wrapper")
     with cd(".."):
-        build_dir = 'build-gpu' if cli_args.use_cuda == 'ON' or cli_args.use_hip == 'ON' else 'build'
+        build_dir = "build-gpu" if cli_args.use_cuda == "ON" else "build"
         maybe_makedirs(build_dir)
         with cd(build_dir):
             if sys.platform == "win32":
                 # Force x64 build on Windows.
-                maybe_generator = ' -A x64'
+                maybe_generator = " -A x64"
             else:
                 maybe_generator = ""
             if sys.platform == "linux":
@@ -100,15 +92,12 @@ if __name__ == "__main__":
             else:
                 maybe_parallel_build = ""
 
-            if cli_args.log_capi_invocation == 'ON':
-                CONFIG['LOG_CAPI_INVOCATION'] = 'ON'
+            if cli_args.log_capi_invocation == "ON":
+                CONFIG["LOG_CAPI_INVOCATION"] = "ON"
 
-            if cli_args.use_cuda == 'ON':
-                CONFIG['USE_CUDA'] = 'ON'
-                CONFIG['USE_NCCL'] = 'ON'
-            elif cli_args.use_hip== 'ON':
-                CONFIG['USE_HIP'] = 'ON'
-                CONFIG['USE_RCCL'] = 'ON'
+            if cli_args.use_cuda == "ON":
+                CONFIG["USE_CUDA"] = "ON"
+                CONFIG["USE_NCCL"] = "ON"
 
             args = ["-D{0}:BOOL={1}".format(k, v) for k, v in CONFIG.items()]
 
@@ -121,7 +110,7 @@ if __name__ == "__main__":
             if gpu_arch_flag is not None:
                 args.append("%s" % gpu_arch_flag)
 
-            lib_dir = os.path.join(os.pardir, 'lib')
+            lib_dir = os.path.join(os.pardir, "lib")
             if os.path.exists(lib_dir):
                 shutil.rmtree(lib_dir)
             run("cmake .. " + " ".join(args) + maybe_generator)
@@ -131,8 +120,10 @@ if __name__ == "__main__":
             run(f'"{sys.executable}" mapfeat.py')
             run(f'"{sys.executable}" mknfold.py machine.txt 1')
 
-    xgboost4j = 'xgboost4j-gpu' if cli_args.use_cuda == 'ON' or cli_args.use_hip== 'ON' else 'xgboost4j'
-    xgboost4j_spark = 'xgboost4j-spark-gpu' if cli_args.use_cuda == 'ON' or cli_args.use_hip == 'ON' else 'xgboost4j-spark'
+    xgboost4j = "xgboost4j-gpu" if cli_args.use_cuda == "ON" else "xgboost4j"
+    xgboost4j_spark = (
+        "xgboost4j-spark-gpu" if cli_args.use_cuda == "ON" else "xgboost4j-spark"
+    )
 
     print("copying native library")
     library_name, os_folder = {
@@ -147,14 +138,19 @@ if __name__ == "__main__":
         "i86pc": "x86_64",  # on Solaris x86_64
         "sun4v": "sparc",  # on Solaris sparc
         "arm64": "aarch64",  # on macOS & Windows ARM 64-bit
-        "aarch64": "aarch64"
+        "aarch64": "aarch64",
     }[platform.machine().lower()]
-    output_folder = "{}/src/main/resources/lib/{}/{}".format(xgboost4j, os_folder, arch_folder)
+    output_folder = "{}/src/main/resources/lib/{}/{}".format(
+        xgboost4j, os_folder, arch_folder
+    )
     maybe_makedirs(output_folder)
     cp("../lib/" + library_name, output_folder)
 
     print("copying pure-Python tracker")
-    cp("../python-package/xgboost/tracker.py", "{}/src/main/resources".format(xgboost4j))
+    cp(
+        "../python-package/xgboost/tracker.py",
+        "{}/src/main/resources".format(xgboost4j),
+    )
 
     print("copying train/test files")
     maybe_makedirs("{}/src/test/resources".format(xgboost4j_spark))
@@ -170,3 +166,18 @@ if __name__ == "__main__":
     maybe_makedirs("{}/src/test/resources".format(xgboost4j))
     for file in glob.glob("../demo/data/agaricus.*"):
         cp(file, "{}/src/test/resources".format(xgboost4j))
+
+
+if __name__ == "__main__":
+    if "MAVEN_SKIP_NATIVE_BUILD" in os.environ:
+        print("MAVEN_SKIP_NATIVE_BUILD is set. Skipping native build...")
+    else:
+        parser = argparse.ArgumentParser()
+        parser.add_argument(
+            "--log-capi-invocation", type=str, choices=["ON", "OFF"], default="OFF"
+        )
+        parser.add_argument(
+            "--use-cuda", type=str, choices=["ON", "OFF"], default="OFF"
+        )
+        cli_args = parser.parse_args()
+        native_build(cli_args)

jvm-packages/pom.xml

@@ -5,8 +5,8 @@
     <modelVersion>4.0.0</modelVersion>
 
     <groupId>ml.dmlc</groupId>
-    <artifactId>xgboost-jvm_${scala.binary.version}</artifactId>
-    <version>2.0.2</version>
+    <artifactId>xgboost-jvm_2.12</artifactId>
+    <version>2.0.3</version>
     <packaging>pom</packaging>
     <name>XGBoost JVM Package</name>
     <description>JVM Package for XGBoost</description>
@@ -43,7 +43,6 @@
         <maven.wagon.http.retryHandler.count>5</maven.wagon.http.retryHandler.count>
         <log.capi.invocation>OFF</log.capi.invocation>
         <use.cuda>OFF</use.cuda>
-        <use.hip>OFF</use.hip>
         <cudf.version>23.08.0</cudf.version>
         <spark.rapids.version>23.08.0</spark.rapids.version>
         <cudf.classifier>cuda11</cudf.classifier>

jvm-packages/xgboost4j-example/pom.xml

@@ -5,12 +5,12 @@
     <modelVersion>4.0.0</modelVersion>
     <parent>
         <groupId>ml.dmlc</groupId>
-        <artifactId>xgboost-jvm_${scala.binary.version}</artifactId>
-        <version>2.0.2</version>
+        <artifactId>xgboost-jvm_2.12</artifactId>
+        <version>2.0.3</version>
     </parent>
     <name>xgboost4j-example</name>
-    <artifactId>xgboost4j-example_${scala.binary.version}</artifactId>
-    <version>2.0.2</version>
+    <artifactId>xgboost4j-example_2.12</artifactId>
+    <version>2.0.3</version>
     <packaging>jar</packaging>
     <build>
         <plugins>
@@ -26,7 +26,7 @@
     <dependencies>
         <dependency>
             <groupId>ml.dmlc</groupId>
-            <artifactId>xgboost4j-spark_${scala.binary.version}</artifactId>
+            <artifactId>xgboost4j-spark_2.12</artifactId>
             <version>${project.version}</version>
         </dependency>
         <dependency>
@@ -37,7 +37,7 @@
         </dependency>
         <dependency>
             <groupId>ml.dmlc</groupId>
-            <artifactId>xgboost4j-flink_${scala.binary.version}</artifactId>
+            <artifactId>xgboost4j-flink_2.12</artifactId>
             <version>${project.version}</version>
         </dependency>
     </dependencies>

jvm-packages/xgboost4j-flink/pom.xml

@@ -5,13 +5,13 @@
     <modelVersion>4.0.0</modelVersion>
     <parent>
         <groupId>ml.dmlc</groupId>
-        <artifactId>xgboost-jvm_${scala.binary.version}</artifactId>
-        <version>2.0.2</version>
+        <artifactId>xgboost-jvm_2.12</artifactId>
+        <version>2.0.3</version>
     </parent>
 
     <name>xgboost4j-flink</name>
-    <artifactId>xgboost4j-flink_${scala.binary.version}</artifactId>
-    <version>2.0.2</version>
+    <artifactId>xgboost4j-flink_2.12</artifactId>
+    <version>2.0.3</version>
     <properties>
       <flink-ml.version>2.2.0</flink-ml.version>
     </properties>
@@ -30,7 +30,7 @@
     <dependencies>
         <dependency>
             <groupId>ml.dmlc</groupId>
-            <artifactId>xgboost4j_${scala.binary.version}</artifactId>
+            <artifactId>xgboost4j_2.12</artifactId>
             <version>${project.version}</version>
         </dependency>
         <dependency>

jvm-packages/xgboost4j-gpu/pom.xml

@@ -5,12 +5,12 @@
     <modelVersion>4.0.0</modelVersion>
     <parent>
         <groupId>ml.dmlc</groupId>
-        <artifactId>xgboost-jvm_${scala.binary.version}</artifactId>
-        <version>2.0.2</version>
+        <artifactId>xgboost-jvm_2.12</artifactId>
+        <version>2.0.3</version>
     </parent>
-    <artifactId>xgboost4j-gpu_${scala.binary.version}</artifactId>
+    <artifactId>xgboost4j-gpu_2.12</artifactId>
     <name>xgboost4j-gpu</name>
-    <version>2.0.2</version>
+    <version>2.0.3</version>
     <packaging>jar</packaging>
 
     <dependencies>
@@ -104,8 +104,6 @@
                                 <argument>${log.capi.invocation}</argument>
                                 <argument>--use-cuda</argument>
                                 <argument>${use.cuda}</argument>
-                                <argument>--use-hip</argument>
-                                <argument>${use.hip}</argument>
                             </arguments>
                             <workingDirectory>${user.dir}</workingDirectory>
                         </configuration>

jvm-packages/xgboost4j-gpu/src/native/xgboost4j-gpu.cpp

@@ -2,7 +2,7 @@
 // Created by bobwang on 2021/9/8.
 //
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#ifndef XGBOOST_USE_CUDA
 
 #include <jni.h>
 

jvm-packages/xgboost4j-gpu/src/native/xgboost4j-gpu.cu

@@ -1,10 +1,6 @@
 #include <jni.h>
 
-#if defined(XGBOOST_USE_CUDA)
 #include "../../../../src/common/device_helpers.cuh"
-#elif defined(XGBOOST_USE_HIP)
-#include "../../../../src/common/device_helpers.hip.h"
-#endif
 #include "../../../../src/common/cuda_pinned_allocator.h"
 #include "../../../../src/data/array_interface.h"
 #include "jvm_utils.h"

jvm-packages/xgboost4j-gpu/src/native/xgboost4j-gpu.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "xgboost4j-gpu.cu"
-#endif

jvm-packages/xgboost4j-spark-gpu/pom.xml

@@ -5,11 +5,11 @@
     <modelVersion>4.0.0</modelVersion>
     <parent>
         <groupId>ml.dmlc</groupId>
-        <artifactId>xgboost-jvm_${scala.binary.version}</artifactId>
-        <version>2.0.2</version>
+        <artifactId>xgboost-jvm_2.12</artifactId>
+        <version>2.0.3</version>
     </parent>
     <name>xgboost4j-spark-gpu</name>
-    <artifactId>xgboost4j-spark-gpu_${scala.binary.version}</artifactId>
+    <artifactId>xgboost4j-spark-gpu_2.12</artifactId>
     <build>
         <plugins>
             <plugin>
@@ -24,7 +24,7 @@
     <dependencies>
         <dependency>
             <groupId>ml.dmlc</groupId>
-            <artifactId>xgboost4j-gpu_${scala.binary.version}</artifactId>
+            <artifactId>xgboost4j-gpu_2.12</artifactId>
             <version>${project.version}</version>
         </dependency>
         <dependency>

jvm-packages/xgboost4j-spark/pom.xml

@@ -5,11 +5,11 @@
     <modelVersion>4.0.0</modelVersion>
     <parent>
         <groupId>ml.dmlc</groupId>
-        <artifactId>xgboost-jvm_${scala.binary.version}</artifactId>
-        <version>2.0.2</version>
+        <artifactId>xgboost-jvm_2.12</artifactId>
+        <version>2.0.3</version>
     </parent>
     <name>xgboost4j-spark</name>
-    <artifactId>xgboost4j-spark_${scala.binary.version}</artifactId>
+    <artifactId>xgboost4j-spark_2.12</artifactId>
     <build>
         <plugins>
             <plugin>
@@ -24,7 +24,7 @@
     <dependencies>
         <dependency>
             <groupId>ml.dmlc</groupId>
-            <artifactId>xgboost4j_${scala.binary.version}</artifactId>
+            <artifactId>xgboost4j_2.12</artifactId>
             <version>${project.version}</version>
         </dependency>
         <dependency>

jvm-packages/xgboost4j/pom.xml

@@ -5,12 +5,12 @@
     <modelVersion>4.0.0</modelVersion>
     <parent>
         <groupId>ml.dmlc</groupId>
-        <artifactId>xgboost-jvm_${scala.binary.version}</artifactId>
-        <version>2.0.2</version>
+        <artifactId>xgboost-jvm_2.12</artifactId>
+        <version>2.0.3</version>
     </parent>
     <name>xgboost4j</name>
-    <artifactId>xgboost4j_${scala.binary.version}</artifactId>
-    <version>2.0.2</version>
+    <artifactId>xgboost4j_2.12</artifactId>
+    <version>2.0.3</version>
     <packaging>jar</packaging>
 
     <dependencies>

python-package/packager/build_config.py

@@ -15,10 +15,6 @@ class BuildConfiguration:  # pylint: disable=R0902
     use_cuda: bool = False
     # Whether to enable NCCL
     use_nccl: bool = False
-    # Whether to enablea HIP 
-    use_hip: bool = False
-    # Whether to enable RCCL
-    use_rccl: bool = False
     # Whether to enable HDFS
     use_hdfs: bool = False
     # Whether to enable Azure Storage

python-package/pyproject.toml

@@ -7,7 +7,7 @@ build-backend = "packager.pep517"
 
 [project]
 name = "xgboost"
-version = "2.0.2"
+version = "2.0.3"
 authors = [
     { name = "Hyunsu Cho", email = "chohyu01@cs.washington.edu" },
     { name = "Jiaming Yuan", email = "jm.yuan@outlook.com" }

python-package/xgboost/VERSION

@@ -1 +1 @@
-2.0.2
+2.0.3

python-package/xgboost/core.py

@@ -206,6 +206,7 @@ def _load_lib() -> ctypes.CDLL:
             lib = ctypes.cdll.LoadLibrary(lib_path)
             setattr(lib, "path", os.path.normpath(lib_path))
             lib_success = True
+            break
         except OSError as e:
             os_error_list.append(str(e))
             continue

python-package/xgboost/dask.py

@@ -78,7 +78,6 @@ from .data import _is_cudf_ser, _is_cupy_array
 from .sklearn import (
     XGBClassifier,
     XGBClassifierBase,
-    XGBClassifierMixIn,
     XGBModel,
     XGBRanker,
     XGBRankerMixIn,
@@ -1854,7 +1853,7 @@ class DaskXGBRegressor(DaskScikitLearnBase, XGBRegressorBase):
     "Implementation of the scikit-learn API for XGBoost classification.",
     ["estimators", "model"],
 )
-class DaskXGBClassifier(DaskScikitLearnBase, XGBClassifierMixIn, XGBClassifierBase):
+class DaskXGBClassifier(DaskScikitLearnBase, XGBClassifierBase):
     # pylint: disable=missing-class-docstring
     async def _fit_async(
         self,
@@ -2036,10 +2035,6 @@ class DaskXGBClassifier(DaskScikitLearnBase, XGBClassifierMixIn, XGBClassifierBa
             preds = da.map_blocks(_argmax, pred_probs, drop_axis=1)
         return preds
 
-    def load_model(self, fname: ModelIn) -> None:
-        super().load_model(fname)
-        self._load_model_attributes(self.get_booster())
-
 
 @xgboost_model_doc(
     """Implementation of the Scikit-Learn API for XGBoost Ranking.

python-package/xgboost/sklearn.py

@@ -43,19 +43,6 @@ from .data import _is_cudf_df, _is_cudf_ser, _is_cupy_array, _is_pandas_df
 from .training import train
 
 
-class XGBClassifierMixIn:  # pylint: disable=too-few-public-methods
-    """MixIn for classification."""
-
-    def __init__(self, *args: Any, **kwargs: Any) -> None:
-        super().__init__(*args, **kwargs)
-
-    def _load_model_attributes(self, booster: Booster) -> None:
-        config = json.loads(booster.save_config())
-        self.n_classes_ = int(config["learner"]["learner_model_param"]["num_class"])
-        # binary classification is treated as regression in XGBoost.
-        self.n_classes_ = 2 if self.n_classes_ < 2 else self.n_classes_
-
-
 class XGBRankerMixIn:  # pylint: disable=too-few-public-methods
     """MixIn for ranking, defines the _estimator_type usually defined in scikit-learn
     base classes.
@@ -845,21 +832,38 @@ class XGBModel(XGBModelBase):
         self.get_booster().load_model(fname)
 
         meta_str = self.get_booster().attr("scikit_learn")
-        if meta_str is None:
-            return
+        if meta_str is not None:
+            meta = json.loads(meta_str)
+            t = meta.get("_estimator_type", None)
+            if t is not None and t != self._get_type():
+                raise TypeError(
+                    "Loading an estimator with different type. Expecting: "
+                    f"{self._get_type()}, got: {t}"
+                )
 
-        meta = json.loads(meta_str)
-        t = meta.get("_estimator_type", None)
-        if t is not None and t != self._get_type():
-            raise TypeError(
-                "Loading an estimator with different type. Expecting: "
-                f"{self._get_type()}, got: {t}"
-            )
         self.feature_types = self.get_booster().feature_types
         self.get_booster().set_attr(scikit_learn=None)
+        config = json.loads(self.get_booster().save_config())
+        self._load_model_attributes(config)
 
     load_model.__doc__ = f"""{Booster.load_model.__doc__}"""
 
+    def _load_model_attributes(self, config: dict) -> None:
+        """Load model attributes without hyper-parameters."""
+        from sklearn.base import is_classifier
+
+        booster = self.get_booster()
+
+        self.objective = config["learner"]["objective"]["name"]
+        self.booster = config["learner"]["gradient_booster"]["name"]
+        self.base_score = config["learner"]["learner_model_param"]["base_score"]
+        self.feature_types = booster.feature_types
+
+        if is_classifier(self):
+            self.n_classes_ = int(config["learner"]["learner_model_param"]["num_class"])
+            # binary classification is treated as regression in XGBoost.
+            self.n_classes_ = 2 if self.n_classes_ < 2 else self.n_classes_
+
     # pylint: disable=too-many-branches
     def _configure_fit(
         self,
@@ -1409,7 +1413,7 @@ def _cls_predict_proba(n_classes: int, prediction: PredtT, vstack: Callable) ->
         Number of boosting rounds.
 """,
 )
-class XGBClassifier(XGBModel, XGBClassifierMixIn, XGBClassifierBase):
+class XGBClassifier(XGBModel, XGBClassifierBase):
     # pylint: disable=missing-docstring,invalid-name,too-many-instance-attributes
     @_deprecate_positional_args
     def __init__(
@@ -1637,10 +1641,6 @@ class XGBClassifier(XGBModel, XGBClassifierMixIn, XGBClassifierBase):
     def classes_(self) -> np.ndarray:
         return np.arange(self.n_classes_)
 
-    def load_model(self, fname: ModelIn) -> None:
-        super().load_model(fname)
-        self._load_model_attributes(self.get_booster())
-
 
 @xgboost_model_doc(
     "scikit-learn API for XGBoost random forest classification.",

src/CMakeLists.txt

@@ -16,11 +16,6 @@ if (USE_CUDA)
   target_sources(objxgboost PRIVATE ${CUDA_SOURCES})
 endif (USE_CUDA)
 
-if (USE_HIP)
-  file(GLOB_RECURSE HIP_SOURCES *.hip *.hip.h)
-  target_sources(objxgboost PRIVATE ${HIP_SOURCES})
-endif (USE_HIP)
-
 target_include_directories(objxgboost
   PRIVATE
   ${xgboost_SOURCE_DIR}/include
@@ -38,7 +33,6 @@ msvc_use_static_runtime()
 
 # This grouping organises source files nicely in visual studio
 auto_source_group("${CUDA_SOURCES}")
-auto_source_group("${HIP_SOURCES}")
 auto_source_group("${CPU_SOURCES}")
 
 #-- End object library

src/c_api/c_api.cc

@@ -70,14 +70,12 @@ XGB_DLL void XGBoostVersion(int* major, int* minor, int* patch) {
 
 using GlobalConfigAPIThreadLocalStore = dmlc::ThreadLocalStore<XGBAPIThreadLocalEntry>;
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 namespace xgboost {
 void XGBBuildInfoDevice(Json *p_info) {
   auto &info = *p_info;
   info["USE_CUDA"] = Boolean{false};
   info["USE_NCCL"] = Boolean{false};
-  info["USE_HIP"] = Boolean{false};
-  info["USE_RCCL"] = Boolean{false};
   info["USE_RMM"] = Boolean{false};
 }
 }  // namespace xgboost
@@ -281,7 +279,7 @@ XGB_DLL int XGDMatrixCreateFromDataIter(
   API_END();
 }
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#ifndef XGBOOST_USE_CUDA
 XGB_DLL int XGDMatrixCreateFromCudaColumnar(char const *, char const *, DMatrixHandle *) {
   API_BEGIN();
   common::AssertGPUSupport();
@@ -1191,7 +1189,7 @@ XGB_DLL int XGBoosterPredictFromCSR(BoosterHandle handle, char const *indptr, ch
   API_END();
 }
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 XGB_DLL int XGBoosterPredictFromCUDAArray(BoosterHandle handle, char const *, char const *,
                                           DMatrixHandle, xgboost::bst_ulong const **,
                                           xgboost::bst_ulong *, const float **) {

src/c_api/c_api.cu

@@ -17,11 +17,7 @@ namespace xgboost {
 void XGBBuildInfoDevice(Json *p_info) {
   auto &info = *p_info;
 
-#if defined(XGBOOST_USE_CUDA)
   info["USE_CUDA"] = true;
-#elif defined(XGBOOST_USE_HIP)
-  info["USE_HIP"] = true;
-#endif
 
   std::vector<Json> v{Json{Integer{THRUST_MAJOR_VERSION}}, Json{Integer{THRUST_MINOR_VERSION}},
                       Json{Integer{THRUST_SUBMINOR_VERSION}}};
@@ -34,13 +30,8 @@ void XGBBuildInfoDevice(Json *p_info) {
   info["USE_NCCL"] = Boolean{true};
   v = {Json{Integer{NCCL_MAJOR}}, Json{Integer{NCCL_MINOR}}, Json{Integer{NCCL_PATCH}}};
   info["NCCL_VERSION"] = v;
-#elif defined(XGBOOST_USE_RCCL)
-  info["USE_RCCL"] = Boolean{true};
-  v = {Json{Integer{NCCL_MAJOR}}, Json{Integer{NCCL_MINOR}}, Json{Integer{NCCL_PATCH}}};
-  info["RCCL_VERSION"] = v;
 #else
   info["USE_NCCL"] = Boolean{false};
-  info["USE_RCCL"] = Boolean{false};
 #endif
 
 #if defined(XGBOOST_USE_RMM)

src/c_api/c_api.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "c_api.cu"
-#endif

src/c_api/c_api_utils.h

@@ -175,7 +175,7 @@ inline float GetMissing(Json const &config) {
 
 // Safe guard some global variables from being changed by XGBoost.
 class XGBoostAPIGuard {
-#if defined(XGBOOST_USE_CUDA) || defined(XGBOOST_USE_HIP)
+#if defined(XGBOOST_USE_CUDA)
   int32_t device_id_ {0};
 
   void SetGPUAttribute();

src/collective/communicator.cc

@@ -51,7 +51,7 @@ void Communicator::Init(Json const& config) {
   }
 }
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#ifndef XGBOOST_USE_CUDA
 void Communicator::Finalize() {
   communicator_->Shutdown();
   communicator_.reset(new NoOpCommunicator());

src/collective/communicator.cu

@@ -5,7 +5,7 @@
 #include "device_communicator.cuh"
 #include "device_communicator_adapter.cuh"
 #include "noop_communicator.h"
-#if defined(XGBOOST_USE_NCCL) || defined(XGBOOST_USE_RCCL)
+#ifdef XGBOOST_USE_NCCL
 #include "nccl_device_communicator.cuh"
 #endif
 
@@ -28,7 +28,7 @@ DeviceCommunicator* Communicator::GetDevice(int device_ordinal) {
       communicator_->GetWorldSize() != old_world_size) {
     old_device_ordinal = device_ordinal;
     old_world_size = communicator_->GetWorldSize();
-#if defined(XGBOOST_USE_NCCL) || defined(XGBOOST_USE_RCCL)
+#ifdef XGBOOST_USE_NCCL
     switch (type_) {
       case CommunicatorType::kRabit:
         device_communicator_.reset(new NcclDeviceCommunicator(device_ordinal, false));

src/collective/communicator.h

@@ -98,7 +98,7 @@ class Communicator {
   /** @brief Get the communicator instance. */
   static Communicator *Get() { return communicator_.get(); }
 
-#if defined(XGBOOST_USE_CUDA) || defined(XGBOOST_USE_HIP)
+#if defined(XGBOOST_USE_CUDA)
   /**
    * @brief Get the device communicator.
    *
@@ -230,7 +230,7 @@ class Communicator {
 
   static thread_local std::unique_ptr<Communicator> communicator_;
   static thread_local CommunicatorType type_;
-#if defined(XGBOOST_USE_CUDA) || defined(XGBOOST_USE_HIP)
+#if defined(XGBOOST_USE_CUDA)
   static thread_local std::unique_ptr<DeviceCommunicator> device_communicator_;
 #endif
 

src/collective/communicator.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "communicator.cu"
-#endif

src/collective/device_communicator_adapter.cuh

@@ -41,6 +41,7 @@ class DeviceCommunicatorAdapter : public DeviceCommunicator {
     }
 
     dh::safe_cuda(cudaSetDevice(device_ordinal_));
+
     segments->clear();
     segments->resize(world_size_, 0);
     segments->at(rank_) = length_bytes;
@@ -59,7 +60,6 @@ class DeviceCommunicatorAdapter : public DeviceCommunicator {
       Broadcast(host_buffer_.data() + offset, as_bytes, i);
       offset += as_bytes;
     }
-
     dh::safe_cuda(cudaMemcpy(receive_buffer->data().get(), host_buffer_.data(), total_bytes,
                              cudaMemcpyDefault));
   }

src/collective/nccl_device_communicator.cu

@@ -1,7 +1,7 @@
 /*!
  * Copyright 2023 XGBoost contributors
  */
-#if defined(XGBOOST_USE_NCCL) || defined(XGBOOST_USE_RCCL)
+#if defined(XGBOOST_USE_NCCL)
 #include "nccl_device_communicator.cuh"
 
 namespace xgboost {

src/collective/nccl_device_communicator.cuh

@@ -35,22 +35,12 @@ class NcclDeviceCommunicator : public DeviceCommunicator {
 
  private:
   static constexpr std::size_t kUuidLength =
-#if defined(XGBOOST_USE_CUDA)
       sizeof(std::declval<cudaDeviceProp>().uuid) / sizeof(uint64_t);
-#elif defined(XGBOOST_USE_HIP)
-      sizeof(hipUUID) / sizeof(uint64_t);
-#endif
 
   void GetCudaUUID(xgboost::common::Span<uint64_t, kUuidLength> const &uuid) const {
-#if defined(XGBOOST_USE_CUDA)
     cudaDeviceProp prob{};
     dh::safe_cuda(cudaGetDeviceProperties(&prob, device_ordinal_));
     std::memcpy(uuid.data(), static_cast<void *>(&(prob.uuid)), sizeof(prob.uuid));
-#elif defined(XGBOOST_USE_HIP)
-    hipUUID id;
-    hipDeviceGetUuid(&id, device_ordinal_);
-    std::memcpy(uuid.data(), static_cast<void *>(&id), sizeof(id));
-#endif
   }
 
   static std::string PrintUUID(xgboost::common::Span<uint64_t, kUuidLength> const &uuid) {

src/collective/nccl_device_communicator.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "nccl_device_communicator.cu"
-#endif

src/common/algorithm.cuh

@@ -10,13 +10,7 @@
 
 #include <cstddef>             // size_t
 #include <cstdint>             // int32_t
-
-#if defined(XGBOOST_USE_HIP)
-#include <hipcub/hipcub.hpp>
-#elif defined(XGBOOST_USE_CUDA)
 #include <cub/cub.cuh>         // DispatchSegmentedRadixSort,NullType,DoubleBuffer
-#endif
-
 #include <iterator>            // distance
 #include <limits>              // numeric_limits
 #include <type_traits>         // conditional_t,remove_const_t
@@ -45,7 +39,6 @@ static void DeviceSegmentedRadixSortKeys(CUDAContext const *ctx, void *d_temp_st
   using OffsetT = int;
 
   // Null value type
-#if defined(XGBOOST_USE_CUDA)
   cub::DoubleBuffer<KeyT> d_keys(const_cast<KeyT *>(d_keys_in), d_keys_out);
   cub::DoubleBuffer<cub::NullType> d_values;
 
@@ -54,20 +47,6 @@ static void DeviceSegmentedRadixSortKeys(CUDAContext const *ctx, void *d_temp_st
                  OffsetT>::Dispatch(d_temp_storage, temp_storage_bytes, d_keys, d_values, num_items,
                                     num_segments, d_begin_offsets, d_end_offsets, begin_bit,
                                     end_bit, false, ctx->Stream(), debug_synchronous)));
-#elif defined(XGBOOST_USE_HIP)
-  if (IS_DESCENDING) {
-      rocprim::segmented_radix_sort_pairs_desc<KeyT, hipcub::NullType, BeginOffsetIteratorT>(d_temp_storage,
-              temp_storage_bytes, d_keys_in, d_keys_out, nullptr, nullptr, num_items,
-              num_segments, d_begin_offsets, d_end_offsets,
-              begin_bit, end_bit, ctx->Stream(), debug_synchronous);
-  }
-  else {
-      rocprim::segmented_radix_sort_pairs<KeyT, hipcub::NullType, BeginOffsetIteratorT>(d_temp_storage,
-              temp_storage_bytes, d_keys_in, d_keys_out, nullptr, nullptr, num_items,
-              num_segments, d_begin_offsets, d_end_offsets,
-              begin_bit, end_bit, ctx->Stream(), debug_synchronous);
-  }
-#endif
 }
 
 // Wrapper around cub sort for easier `descending` sort.
@@ -81,18 +60,14 @@ void DeviceSegmentedRadixSortPair(void *d_temp_storage,
                                   BeginOffsetIteratorT d_begin_offsets,
                                   EndOffsetIteratorT d_end_offsets, dh::CUDAStreamView stream,
                                   int begin_bit = 0, int end_bit = sizeof(KeyT) * 8) {
-#if defined(XGBOOST_USE_CUDA)
   cub::DoubleBuffer<KeyT> d_keys(const_cast<KeyT *>(d_keys_in), d_keys_out);
   cub::DoubleBuffer<ValueT> d_values(const_cast<ValueT *>(d_values_in), d_values_out);
-#endif
-
   // In old version of cub, num_items in dispatch is also int32_t, no way to change.
   using OffsetT = std::conditional_t<dh::BuildWithCUDACub() && dh::HasThrustMinorVer<13>(),
                                      std::size_t, std::int32_t>;
   CHECK_LE(num_items, std::numeric_limits<OffsetT>::max());
   // For Thrust >= 1.12 or CUDA >= 11.4, we require system cub installation
 
-#if defined(XGBOOST_USE_CUDA)
 #if THRUST_MAJOR_VERSION >= 2
   dh::safe_cuda((cub::DispatchSegmentedRadixSort<
                  descending, KeyT, ValueT, BeginOffsetIteratorT, EndOffsetIteratorT,
@@ -113,18 +88,6 @@ void DeviceSegmentedRadixSortPair(void *d_temp_storage,
                                                           d_begin_offsets, d_end_offsets, begin_bit,
                                                           end_bit, false, stream, false)));
 #endif
-#elif defined(XGBOOST_USE_HIP)
-  if (descending) {
-      rocprim::segmented_radix_sort_pairs_desc(d_temp_storage, temp_storage_bytes, d_keys_in, d_keys_out,
-              d_values_in, d_values_out, num_items, num_segments,
-              d_begin_offsets, d_end_offsets, begin_bit, end_bit, stream, false);
-  }
-  else {
-      rocprim::segmented_radix_sort_pairs(d_temp_storage, temp_storage_bytes, d_keys_in, d_keys_out,
-              d_values_in, d_values_out, num_items, num_segments, d_begin_offsets, d_end_offsets,
-              begin_bit, end_bit, stream, false);
-  }
-#endif
 }
 }  // namespace detail
 

src/common/bitfield.h

@@ -17,18 +17,14 @@
 #include <thrust/copy.h>
 #include <thrust/device_ptr.h>
 #include "device_helpers.cuh"
-#elif defined(__HIPCC__)
-#include <thrust/copy.h>
-#include <thrust/device_ptr.h>
-#include "device_helpers.hip.h"
-#endif  // defined(__CUDACC__) || defined(__HIPCC__)
+#endif  // defined(__CUDACC__)
 
 #include "xgboost/span.h"
 #include "common.h"
 
 namespace xgboost {
 
-#if defined(__CUDACC__) || defined(__HIPCC__)
+#if defined(__CUDACC__)
 using BitFieldAtomicType = unsigned long long;  // NOLINT
 
 __forceinline__ __device__ BitFieldAtomicType AtomicOr(BitFieldAtomicType* address,
@@ -52,7 +48,7 @@ __forceinline__ __device__ BitFieldAtomicType AtomicAnd(BitFieldAtomicType* addr
 
   return old;
 }
-#endif  // defined(__CUDACC__) || defined(__HIPCC__)
+#endif  // defined(__CUDACC__)
 
 /**
  * @brief A non-owning type with auxiliary methods defined for manipulating bits.
@@ -110,7 +106,7 @@ struct BitFieldContainer {
   XGBOOST_DEVICE static size_t ComputeStorageSize(index_type size) {
     return common::DivRoundUp(size, kValueSize);
   }
-#if defined(__CUDA_ARCH__) || defined(__HIPCC__)
+#if defined(__CUDA_ARCH__)
   __device__ BitFieldContainer& operator|=(BitFieldContainer const& rhs) {
     auto tid = blockIdx.x * blockDim.x + threadIdx.x;
     size_t min_size = min(NumValues(), rhs.NumValues());
@@ -127,9 +123,9 @@ struct BitFieldContainer {
     }
     return *this;
   }
-#endif  // #if defined(__CUDA_ARCH__) || defined(__HIPCC__)
+#endif  // #if defined(__CUDA_ARCH__)
 
-#if defined(__CUDA_ARCH__) || defined(__HIPCC__)
+#if defined(__CUDA_ARCH__)
   __device__ BitFieldContainer& operator&=(BitFieldContainer const& rhs) {
     size_t min_size = min(NumValues(), rhs.NumValues());
     auto tid = blockIdx.x * blockDim.x + threadIdx.x;
@@ -148,7 +144,7 @@ struct BitFieldContainer {
   }
 #endif  // defined(__CUDA_ARCH__)
 
-#if defined(__CUDA_ARCH__) || defined(__HIPCC__)
+#if defined(__CUDA_ARCH__)
   __device__ auto Set(index_type pos) noexcept(true) {
     Pos pos_v = Direction::Shift(ToBitPos(pos));
     value_type& value = Data()[pos_v.int_pos];
@@ -163,14 +159,6 @@ struct BitFieldContainer {
     using Type = typename dh::detail::AtomicDispatcher<sizeof(value_type)>::Type;
     atomicAnd(reinterpret_cast<Type *>(&value), clear_bit);
   }
-#ifdef __HIPCC__
-  void Clear(index_type pos) noexcept(true) {
-    Pos pos_v = Direction::Shift(ToBitPos(pos));
-    value_type& value = Data()[pos_v.int_pos];
-    value_type clear_bit = ~(kOne << pos_v.bit_pos);
-    value &= clear_bit;
-  }
-#endif
 #else
   void Set(index_type pos) noexcept(true) {
     Pos pos_v = Direction::Shift(ToBitPos(pos));
@@ -184,7 +172,7 @@ struct BitFieldContainer {
     value_type clear_bit = ~(kOne << pos_v.bit_pos);
     value &= clear_bit;
   }
-#endif  // defined(__CUDA_ARCH__) || defined(__HIPCC__)
+#endif  // defined(__CUDA_ARCH__)
 
   XGBOOST_DEVICE bool Check(Pos pos_v) const noexcept(true) {
     pos_v = Direction::Shift(pos_v);

src/common/common.cc

@@ -55,7 +55,7 @@ void EscapeU8(std::string const &string, std::string *p_buffer) {
   }
 }
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 int AllVisibleGPUs() { return 0; }
 #endif  // !defined(XGBOOST_USE_CUDA)
 

src/common/common.cu

@@ -2,7 +2,6 @@
  * Copyright 2018-2022 XGBoost contributors
  */
 #include "common.h"
-#include "cuda_to_hip.h"
 
 namespace xgboost {
 namespace common {

src/common/common.h

@@ -26,12 +26,6 @@
 
 #define WITH_CUDA() true
 
-#elif defined(__HIPCC__)
-#include <thrust/system/hip/error.h>
-#include <thrust/system_error.h>
-
-#define WITH_CUDA() true
-
 #else
 
 #define WITH_CUDA() false
@@ -45,8 +39,8 @@ namespace dh {
  */
 #define safe_cuda(ans) ThrowOnCudaError((ans), __FILE__, __LINE__)
 
-inline cudaError_t ThrowOnCudaError(cudaError_t code, const char *file, int line)
-{
+inline cudaError_t ThrowOnCudaError(cudaError_t code, const char *file,
+                                    int line) {
   if (code != cudaSuccess) {
     LOG(FATAL) << thrust::system_error(code, thrust::cuda_category(),
                                        std::string{file} + ": " +  // NOLINT
@@ -54,23 +48,7 @@ inline cudaError_t ThrowOnCudaError(cudaError_t code, const char *file, int line
   }
   return code;
 }
-
-#elif defined(__HIPCC__)
-/*
- * Error handling  functions
- */
-#define safe_cuda(ans) ThrowOnCudaError((ans), __FILE__, __LINE__)
-
-inline hipError_t ThrowOnCudaError(hipError_t code, const char *file, int line)
-{
-  if (code != hipSuccess) {
-    LOG(FATAL) << thrust::system_error(code, thrust::hip_category(),
-                                       std::string{file} + ": " +  // NOLINT
-                                       std::to_string(line)).what();
-  }
-  return code;
-}
-#endif
+#endif  // defined(__CUDACC__)
 }  // namespace dh
 
 namespace xgboost::common {
@@ -181,9 +159,9 @@ class Range {
 int AllVisibleGPUs();
 
 inline void AssertGPUSupport() {
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#ifndef XGBOOST_USE_CUDA
     LOG(FATAL) << "XGBoost version not compiled with GPU support.";
-#endif  // XGBOOST_USE_CUDA && XGBOOST_USE_HIP
+#endif  // XGBOOST_USE_CUDA
 }
 
 inline void AssertOneAPISupport() {
@@ -194,7 +172,7 @@ inline void AssertOneAPISupport() {
 
 void SetDevice(std::int32_t device);
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 inline void SetDevice(std::int32_t device) {
   if (device >= 0) {
     AssertGPUSupport();

src/common/common.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "common.cu"
-#endif

src/common/compressed_iterator.h

@@ -11,11 +11,9 @@
 
 #include "common.h"
 
-#if defined(__CUDACC__)
+#ifdef __CUDACC__
 #include "device_helpers.cuh"
-#elif defined(__HIPCC__)
-#include "device_helpers.hip.h"
-#endif  // __CUDACC__ || __HIPCC__
+#endif  // __CUDACC__
 
 namespace xgboost {
 namespace common {
@@ -107,7 +105,7 @@ class CompressedBufferWriter {
     }
   }
 
-#if defined(__CUDACC__) || defined(__HIPCC__)
+#ifdef __CUDACC__
   __device__ void AtomicWriteSymbol
     (CompressedByteT* buffer, uint64_t symbol, size_t offset) {
     size_t ibit_start = offset * symbol_bits_;
@@ -121,7 +119,7 @@ class CompressedBufferWriter {
       symbol >>= 8;
     }
   }
-#endif  // __CUDACC__ || __HIPCC__
+#endif  // __CUDACC__
 
   template <typename IterT>
   void Write(CompressedByteT *buffer, IterT input_begin, IterT input_end) {

src/common/cuda_context.cuh

@@ -4,6 +4,7 @@
 #ifndef XGBOOST_COMMON_CUDA_CONTEXT_CUH_
 #define XGBOOST_COMMON_CUDA_CONTEXT_CUH_
 #include <thrust/execution_policy.h>
+
 #include "device_helpers.cuh"
 
 namespace xgboost {

src/common/cuda_pinned_allocator.h

@@ -72,23 +72,11 @@ class pinned_allocator {
     if (cnt > this->max_size()) { throw std::bad_alloc(); }  // end if
 
     pointer result(nullptr);
-
-#if defined(XGBOOST_USE_HIP)
-    dh::safe_cuda(hipHostMalloc(reinterpret_cast<void**>(&result), cnt * sizeof(value_type)));
-#else
     dh::safe_cuda(cudaMallocHost(reinterpret_cast<void**>(&result), cnt * sizeof(value_type)));
-#endif
-
     return result;
   }
 
-  inline void deallocate(pointer p, size_type) {
-#if defined(XGBOOST_USE_HIP)
-      dh::safe_cuda(hipHostFree(p));
-#else
-      dh::safe_cuda(cudaFreeHost(p));
-#endif
-  } // NOLINT
+  inline void deallocate(pointer p, size_type) { dh::safe_cuda(cudaFreeHost(p)); } // NOLINT
 
   inline size_type max_size() const { return (std::numeric_limits<size_type>::max)() / sizeof(T); } // NOLINT
 

src/common/cuda_to_hip.h

@@ -1,71 +0,0 @@
-/**
- * Copyright 2017-2023 XGBoost contributors
- */
-#pragma once
-
-#if defined(XGBOOST_USE_HIP)
-
-#define cudaSuccess                  hipSuccess
-#define cudaGetLastError             hipGetLastError
-
-#define cudaStream_t                 hipStream_t
-#define cudaStreamCreate             hipStreamCreate
-#define cudaStreamCreateWithFlags    hipStreamCreateWithFlags
-#define cudaStreamDestroy            hipStreamDestroy
-#define cudaStreamWaitEvent          hipStreamWaitEvent
-#define cudaStreamSynchronize        hipStreamSynchronize
-#define cudaStreamPerThread          hipStreamPerThread
-#define cudaStreamLegacy             hipStreamLegacy
-
-#define cudaEvent_t                  hipEvent_t
-#define cudaEventCreate              hipEventCreate
-#define cudaEventCreateWithFlags     hipEventCreateWithFlags
-#define cudaEventDestroy             hipEventDestroy
-
-#define cudaGetDevice                hipGetDevice
-#define cudaSetDevice                hipSetDevice
-#define cudaGetDeviceCount           hipGetDeviceCount
-#define cudaDeviceSynchronize        hipDeviceSynchronize
-
-#define cudaGetDeviceProperties      hipGetDeviceProperties
-#define cudaDeviceGetAttribute       hipDeviceGetAttribute
-
-#define cudaMallocHost               hipMallocHost
-#define cudaFreeHost                 hipFreeHost
-#define cudaMalloc                   hipMalloc
-#define cudaFree                     hipFree
-
-#define cudaMemcpy                   hipMemcpy
-#define cudaMemcpyAsync              hipMemcpyAsync
-#define cudaMemcpyDefault            hipMemcpyDefault
-#define cudaMemcpyHostToDevice       hipMemcpyHostToDevice
-#define cudaMemcpyHostToHost         hipMemcpyHostToHost
-#define cudaMemcpyDeviceToHost       hipMemcpyDeviceToHost
-#define cudaMemcpyDeviceToDevice     hipMemcpyDeviceToDevice
-#define cudaMemsetAsync              hipMemsetAsync
-#define cudaMemset                   hipMemset
-
-#define cudaPointerAttributes        hipPointerAttribute_t 
-#define cudaPointerGetAttributes     hipPointerGetAttributes
-
-#define cudaMemGetInfo               hipMemGetInfo
-#define cudaFuncSetAttribute         hipFuncSetAttribute
-
-#define cudaDevAttrMultiProcessorCount                hipDeviceAttributeMultiprocessorCount
-#define cudaOccupancyMaxActiveBlocksPerMultiprocessor hipOccupancyMaxActiveBlocksPerMultiprocessor
-
-namespace thrust {
-    namespace hip {
-    }
-}
-
-namespace thrust {
-    namespace cuda = thrust::hip;
-}
-
-namespace hipcub {
-}
-
-namespace cub = hipcub;
-
-#endif

src/common/device_helpers.cuh

@@ -2,8 +2,6 @@
  * Copyright 2017-2023 XGBoost contributors
  */
 #pragma once
-
-#if defined(XGBOOST_USE_CUDA)
 #include <thrust/binary_search.h>  // thrust::upper_bound
 #include <thrust/device_malloc_allocator.h>
 #include <thrust/device_ptr.h>
@@ -1220,7 +1218,3 @@ class LDGIterator {
   }
 };
 }  // namespace dh
-
-#elif defined(XGBOOST_USE_HIP)
-#include "device_helpers.hip.h"
-#endif

src/common/hist_util.cuh

@@ -84,19 +84,10 @@ __global__ void GetColumnSizeSharedMemKernel(IterSpan<BatchIt> batch_iter,
 template <std::uint32_t kBlockThreads, typename Kernel>
 std::uint32_t EstimateGridSize(std::int32_t device, Kernel kernel, std::size_t shared_mem) {
   int n_mps = 0;
-#if defined(XGBOOST_USE_CUDA)
   dh::safe_cuda(cudaDeviceGetAttribute(&n_mps, cudaDevAttrMultiProcessorCount, device));
-#elif defined(XGBOOST_USE_HIP)
-  dh::safe_cuda(hipDeviceGetAttribute(&n_mps, hipDeviceAttributeMultiprocessorCount, device));
-#endif
   int n_blocks_per_mp = 0;
-#if defined(XGBOOST_USE_CUDA)
   dh::safe_cuda(cudaOccupancyMaxActiveBlocksPerMultiprocessor(&n_blocks_per_mp, kernel,
                                                               kBlockThreads, shared_mem));
-#elif defined(XGBOOST_USE_HIP)
-  dh::safe_cuda(hipOccupancyMaxActiveBlocksPerMultiprocessor(&n_blocks_per_mp, kernel,
-                                                              kBlockThreads, shared_mem));
-#endif
   std::uint32_t grid_size = n_blocks_per_mp * n_mps;
   return grid_size;
 }
@@ -179,7 +170,6 @@ void GetColumnSizesScan(int device, size_t num_columns, std::size_t num_cuts_per
       column_sizes_scan->begin(), [=] __device__(size_t column_size) {
         return thrust::min(num_cuts_per_feature, column_size);
       });
-
   thrust::exclusive_scan(thrust::cuda::par(alloc), cut_ptr_it,
                          cut_ptr_it + column_sizes_scan->size(), cuts_ptr->DevicePointer());
   thrust::exclusive_scan(thrust::cuda::par(alloc), column_sizes_scan->begin(),
@@ -304,7 +294,6 @@ void ProcessSlidingWindow(AdapterBatch const &batch, MetaInfo const &info,
                                  &column_sizes_scan,
                                  &sorted_entries);
   dh::XGBDeviceAllocator<char> alloc;
-
   thrust::sort(thrust::cuda::par(alloc), sorted_entries.begin(),
                sorted_entries.end(), detail::EntryCompareOp());
 
@@ -364,13 +353,11 @@ void ProcessWeightedSlidingWindow(Batch batch, MetaInfo const& info,
           bst_group_t group_idx = dh::SegmentId(d_group_ptr, ridx);
           return weights[group_idx];
         });
-
     auto retit = thrust::copy_if(thrust::cuda::par(alloc),
                                  weight_iter + begin, weight_iter + end,
                                  batch_iter + begin,
                                  d_temp_weights.data(),  // output
                                  is_valid);
-
     CHECK_EQ(retit - d_temp_weights.data(), d_temp_weights.size());
   } else {
     CHECK_EQ(batch.NumRows(), weights.size());
@@ -379,13 +366,11 @@ void ProcessWeightedSlidingWindow(Batch batch, MetaInfo const& info,
         [=]__device__(size_t idx) -> float {
           return weights[batch.GetElement(idx).row_idx];
         });
-
     auto retit = thrust::copy_if(thrust::cuda::par(alloc),
                                  weight_iter + begin, weight_iter + end,
                                  batch_iter + begin,
                                  d_temp_weights.data(),  // output
                                  is_valid);
-
     CHECK_EQ(retit - d_temp_weights.data(), d_temp_weights.size());
   }
 

src/common/hist_util.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "hist_util.cu"
-#endif

src/common/host_device_vector.cc

@@ -1,7 +1,7 @@
 /**
  * Copyright 2017-2023 by XGBoost contributors
  */
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#ifndef XGBOOST_USE_CUDA
 
 // dummy implementation of HostDeviceVector in case CUDA is not used
 
@@ -199,4 +199,4 @@ template class HostDeviceVector<std::size_t>;
 
 }  // namespace xgboost
 
-#endif  // XGBOOST_USE_CUDA && !defined(XGBOOST_USE_HIP)
+#endif  // XGBOOST_USE_CUDA

src/common/host_device_vector.cu

@@ -139,7 +139,6 @@ class HostDeviceVectorImpl {
       auto ptr = other->ConstDevicePointer();
       SetDevice();
       CHECK_EQ(this->DeviceIdx(), other->DeviceIdx());
-
       dh::safe_cuda(cudaMemcpyAsync(this->DevicePointer() + ori_size,
                                     ptr,
                                     other->Size() * sizeof(T),
@@ -196,7 +195,6 @@ class HostDeviceVectorImpl {
     gpu_access_ = access;
     if (data_h_.size() != data_d_->size()) { data_h_.resize(data_d_->size()); }
     SetDevice();
-
     dh::safe_cuda(cudaMemcpy(data_h_.data(),
                              data_d_->data().get(),
                              data_d_->size() * sizeof(T),
@@ -213,7 +211,6 @@ class HostDeviceVectorImpl {
     // data is on the host
     LazyResizeDevice(data_h_.size());
     SetDevice();
-
     dh::safe_cuda(cudaMemcpyAsync(data_d_->data().get(),
                                   data_h_.data(),
                                   data_d_->size() * sizeof(T),
@@ -242,7 +239,6 @@ class HostDeviceVectorImpl {
       LazyResizeDevice(Size());
       gpu_access_ = GPUAccess::kWrite;
       SetDevice();
-
       dh::safe_cuda(cudaMemcpyAsync(data_d_->data().get(), other->data_d_->data().get(),
                                     data_d_->size() * sizeof(T), cudaMemcpyDefault));
     }
@@ -252,7 +248,6 @@ class HostDeviceVectorImpl {
     LazyResizeDevice(Size());
     gpu_access_ = GPUAccess::kWrite;
     SetDevice();
-
     dh::safe_cuda(cudaMemcpyAsync(data_d_->data().get(), begin,
                                   data_d_->size() * sizeof(T), cudaMemcpyDefault));
   }

src/common/host_device_vector.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "host_device_vector.cu"
-#endif

src/common/linalg_op.cuh

@@ -12,8 +12,7 @@
 namespace xgboost {
 namespace linalg {
 template <typename T, int32_t D, typename Fn>
-void ElementWiseKernelDevice(linalg::TensorView<T, D> t, Fn&& fn, cudaStream_t s = nullptr)
-{
+void ElementWiseKernelDevice(linalg::TensorView<T, D> t, Fn&& fn, cudaStream_t s = nullptr) {
   dh::safe_cuda(cudaSetDevice(t.DeviceIdx()));
   static_assert(std::is_void<std::result_of_t<Fn(size_t, T&)>>::value,
                 "For function with return, use transform instead.");
@@ -29,8 +28,7 @@ void ElementWiseKernelDevice(linalg::TensorView<T, D> t, Fn&& fn, cudaStream_t s
 }
 
 template <typename T, int32_t D, typename Fn>
-void ElementWiseTransformDevice(linalg::TensorView<T, D> t, Fn&& fn, cudaStream_t s = nullptr)
-{
+void ElementWiseTransformDevice(linalg::TensorView<T, D> t, Fn&& fn, cudaStream_t s = nullptr) {
   if (t.Contiguous()) {
     auto ptr = t.Values().data();
     dh::LaunchN(t.Size(), s, [=] __device__(size_t i) { ptr[i] = fn(i, ptr[i]); });

src/common/linalg_op.h

@@ -42,7 +42,7 @@ void ElementWiseKernelHost(linalg::TensorView<T, D> t, int32_t n_threads, Fn&& f
   }
 }
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 template <typename T, int32_t D, typename Fn>
 void ElementWiseKernelDevice(linalg::TensorView<T, D>, Fn&&, void* = nullptr) {
   common::AssertGPUSupport();
@@ -60,7 +60,7 @@ void ElementWiseKernel(Context const* ctx, linalg::TensorView<T, D> t, Fn&& fn)
   }
   ElementWiseKernelHost(t, ctx->Threads(), fn);
 }
-#endif  // !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#endif  // !defined(XGBOOST_USE_CUDA)
 
 template <typename T, std::int32_t kDim>
 auto cbegin(TensorView<T, kDim> const& v) {  // NOLINT

src/common/math.h

@@ -143,7 +143,7 @@ CheckNAN(T) {
   return false;
 }
 
-#if XGBOOST_STRICT_R_MODE && !defined(__CUDA_ARCH__) && !defined(__HIPCC__)
+#if XGBOOST_STRICT_R_MODE && !defined(__CUDA_ARCH__)
 
 bool CheckNAN(double v);
 
@@ -152,27 +152,23 @@ bool CheckNAN(double v);
 XGBOOST_DEVICE bool inline CheckNAN(float x) {
 #if defined(__CUDA_ARCH__)
   return isnan(x);
-#elif defined(__HIPCC__)
-  return __builtin_isnan(x);
 #else
   return std::isnan(x);
-#endif  // defined(__CUDA_ARCH__) || defined(__HIPCC__)
+#endif  // defined(__CUDA_ARCH__)
 }
 
 XGBOOST_DEVICE bool inline CheckNAN(double x) {
 #if defined(__CUDA_ARCH__)
   return isnan(x);
-#elif defined(__HIPCC__)
-  return __builtin_isnan(x);
 #else
   return std::isnan(x);
-#endif  // defined(__CUDA_ARCH__) || defined(__HIPCC__)
+#endif  // defined(__CUDA_ARCH__)
 }
 
 #endif  // XGBOOST_STRICT_R_MODE && !defined(__CUDA_ARCH__)
 // GPU version is not uploaded in CRAN anyway.
 // Specialize only when using R with CPU.
-#if XGBOOST_STRICT_R_MODE && !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if XGBOOST_STRICT_R_MODE && !defined(XGBOOST_USE_CUDA)
 double LogGamma(double v);
 
 #else  // Not R or R with GPU.
@@ -195,7 +191,7 @@ XGBOOST_DEVICE inline T LogGamma(T v) {
 #endif  // _MSC_VER
 }
 
-#endif  // XGBOOST_STRICT_R_MODE && !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#endif  // XGBOOST_STRICT_R_MODE && !defined(XGBOOST_USE_CUDA)
 
 }  // namespace common
 }  // namespace xgboost

src/common/numeric.cu

@@ -15,7 +15,6 @@ double Reduce(Context const* ctx, HostDeviceVector<float> const& values) {
   values.SetDevice(ctx->gpu_id);
   auto const d_values = values.ConstDeviceSpan();
   dh::XGBCachingDeviceAllocator<char> alloc;
-
   return dh::Reduce(thrust::cuda::par(alloc), dh::tcbegin(d_values), dh::tcend(d_values), 0.0,
                     thrust::plus<float>{});
 }

src/common/numeric.h

@@ -99,12 +99,12 @@ void PartialSum(int32_t n_threads, InIt begin, InIt end, T init, OutIt out_it) {
 
 namespace cuda_impl {
 double Reduce(Context const* ctx, HostDeviceVector<float> const& values);
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 inline double Reduce(Context const*, HostDeviceVector<float> const&) {
   AssertGPUSupport();
   return 0;
 }
-#endif  // !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#endif  // !defined(XGBOOST_USE_CUDA)
 }  // namespace cuda_impl
 
 /**

src/common/numeric.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "numeric.cu"
-#endif

src/common/quantile.cu

@@ -109,7 +109,6 @@ template <typename T, typename U>
 void CopyTo(Span<T> out, Span<U> src) {
   CHECK_EQ(out.size(), src.size());
   static_assert(std::is_same<std::remove_cv_t<T>, std::remove_cv_t<T>>::value);
-
   dh::safe_cuda(cudaMemcpyAsync(out.data(), src.data(),
                                 out.size_bytes(),
                                 cudaMemcpyDefault));
@@ -163,7 +162,6 @@ common::Span<thrust::tuple<uint64_t, uint64_t>> MergePath(
   // Compute output ptr
   auto transform_it =
       thrust::make_zip_iterator(thrust::make_tuple(x_ptr.data(), y_ptr.data()));
-
   thrust::transform(
       thrust::cuda::par(alloc), transform_it, transform_it + x_ptr.size(),
       out_ptr.data(),
@@ -213,7 +211,6 @@ void MergeImpl(int32_t device, Span<SketchEntry const> const &d_x,
                Span<bst_row_t const> const &x_ptr, Span<SketchEntry const> const &d_y,
                Span<bst_row_t const> const &y_ptr, Span<SketchEntry> out, Span<bst_row_t> out_ptr) {
   dh::safe_cuda(cudaSetDevice(device));
-
   CHECK_EQ(d_x.size() + d_y.size(), out.size());
   CHECK_EQ(x_ptr.size(), out_ptr.size());
   CHECK_EQ(y_ptr.size(), out_ptr.size());
@@ -312,7 +309,6 @@ void SketchContainer::Push(Span<Entry const> entries, Span<size_t> columns_ptr,
                            common::Span<OffsetT> cuts_ptr,
                            size_t total_cuts, Span<float> weights) {
   dh::safe_cuda(cudaSetDevice(device_));
-
   Span<SketchEntry> out;
   dh::device_vector<SketchEntry> cuts;
   bool first_window = this->Current().empty();
@@ -382,7 +378,6 @@ size_t SketchContainer::ScanInput(Span<SketchEntry> entries, Span<OffsetT> d_col
       });
   // Reverse scan to accumulate weights into first duplicated element on left.
   auto val_it = thrust::make_reverse_iterator(dh::tend(entries));
-
   thrust::inclusive_scan_by_key(
       thrust::cuda::par(alloc), key_it, key_it + entries.size(),
       val_it, val_it,
@@ -448,7 +443,6 @@ void SketchContainer::Prune(size_t to) {
 void SketchContainer::Merge(Span<OffsetT const> d_that_columns_ptr,
                             Span<SketchEntry const> that) {
   dh::safe_cuda(cudaSetDevice(device_));
-
   timer_.Start(__func__);
   if (this->Current().size() == 0) {
     CHECK_EQ(this->columns_ptr_.HostVector().back(), 0);
@@ -484,7 +478,6 @@ void SketchContainer::Merge(Span<OffsetT const> d_that_columns_ptr,
 
 void SketchContainer::FixError() {
   dh::safe_cuda(cudaSetDevice(device_));
-
   auto d_columns_ptr = this->columns_ptr_.ConstDeviceSpan();
   auto in = dh::ToSpan(this->Current());
   dh::LaunchN(in.size(), [=] __device__(size_t idx) {
@@ -642,12 +635,10 @@ void SketchContainer::MakeCuts(HistogramCuts* p_cuts, bool is_column_split) {
     CHECK_EQ(num_columns_, d_in_columns_ptr.size() - 1);
     max_values.resize(d_in_columns_ptr.size() - 1);
     dh::caching_device_vector<SketchEntry> d_max_values(d_in_columns_ptr.size() - 1);
-
     thrust::reduce_by_key(thrust::cuda::par(alloc), key_it, key_it + in_cut_values.size(), val_it,
                           thrust::make_discard_iterator(), d_max_values.begin(),
                           thrust::equal_to<bst_feature_t>{},
                           [] __device__(auto l, auto r) { return l.value > r.value ? l : r; });
-
     dh::CopyDeviceSpanToVector(&max_values, dh::ToSpan(d_max_values));
     auto max_it = MakeIndexTransformIter([&](auto i) {
       if (IsCat(h_feature_types, i)) {

src/common/quantile.cuh

@@ -175,7 +175,6 @@ class SketchContainer {
   template <typename KeyComp = thrust::equal_to<size_t>>
   size_t Unique(KeyComp key_comp = thrust::equal_to<size_t>{}) {
     timer_.Start(__func__);
-
     dh::safe_cuda(cudaSetDevice(device_));
     this->columns_ptr_.SetDevice(device_);
     Span<OffsetT> d_column_scan = this->columns_ptr_.DeviceSpan();
@@ -187,13 +186,11 @@ class SketchContainer {
     dh::XGBCachingDeviceAllocator<char> alloc;
 
     d_column_scan = this->columns_ptr_.DeviceSpan();
-
     size_t n_uniques = dh::SegmentedUnique(
         thrust::cuda::par(alloc), d_column_scan.data(),
         d_column_scan.data() + d_column_scan.size(), entries.data(),
         entries.data() + entries.size(), scan_out.DevicePointer(),
         entries.data(), detail::SketchUnique{}, key_comp);
-
     this->columns_ptr_.Copy(scan_out);
     CHECK(!this->columns_ptr_.HostCanRead());
 

src/common/quantile.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "quantile.cu"
-#endif

src/common/ranking_utils.cc

@@ -62,7 +62,7 @@ common::Span<std::size_t const> RankingCache::MakeRankOnCPU(Context const* ctx,
   return rank;
 }
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 void RankingCache::InitOnCUDA(Context const*, MetaInfo const&) { common::AssertGPUSupport(); }
 common::Span<std::size_t const> RankingCache::MakeRankOnCUDA(Context const*,
                                                              common::Span<float const>) {
@@ -108,9 +108,9 @@ void NDCGCache::InitOnCPU(Context const* ctx, MetaInfo const& info) {
   });
 }
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 void NDCGCache::InitOnCUDA(Context const*, MetaInfo const&) { common::AssertGPUSupport(); }
-#endif  // !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#endif  // !defined(XGBOOST_USE_CUDA)
 
 DMLC_REGISTER_PARAMETER(LambdaRankParam);
 
@@ -120,7 +120,7 @@ void PreCache::InitOnCPU(Context const*, MetaInfo const& info) {
                  [](auto beg, auto end, auto op) { return std::all_of(beg, end, op); });
 }
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 void PreCache::InitOnCUDA(Context const*, MetaInfo const&) { common::AssertGPUSupport(); }
 #endif  // !defined(XGBOOST_USE_CUDA)
 
@@ -130,9 +130,9 @@ void MAPCache::InitOnCPU(Context const*, MetaInfo const& info) {
                  [](auto beg, auto end, auto op) { return std::all_of(beg, end, op); });
 }
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 void MAPCache::InitOnCUDA(Context const*, MetaInfo const&) { common::AssertGPUSupport(); }
-#endif  // !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#endif  // !defined(XGBOOST_USE_CUDA)
 
 std::string ParseMetricName(StringView name, StringView param, position_t* topn, bool* minus) {
   std::string out_name;

src/common/ranking_utils.cu

@@ -23,10 +23,6 @@
 #include "xgboost/logging.h"                    // for CHECK
 #include "xgboost/span.h"                       // for Span
 
-#if defined(XGBOOST_USE_HIP)
-#include <hipcub/hipcub.hpp>
-#endif
-
 namespace xgboost::ltr {
 namespace cuda_impl {
 void CalcQueriesDCG(Context const* ctx, linalg::VectorView<float const> d_labels,

src/common/ranking_utils.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "ranking_utils.cu"
-#endif

src/common/stats.cu

@@ -18,7 +18,6 @@
 namespace xgboost {
 namespace common {
 namespace cuda_impl {
-
 void Median(Context const* ctx, linalg::TensorView<float const, 2> t,
             common::OptionalWeights weights, linalg::Tensor<float, 1>* out) {
   CHECK_GE(t.Shape(1), 1);

src/common/stats.cuh

@@ -216,7 +216,6 @@ void SegmentedWeightedQuantile(Context const* ctx, AlphaIt alpha_it, SegIt seg_b
                                                          detail::SegOp<SegIt>{seg_beg, seg_end});
   auto scan_val = dh::MakeTransformIterator<float>(thrust::make_counting_iterator(0ul),
                                                    detail::WeightOp<WIter>{w_begin, d_sorted_idx});
-
   thrust::inclusive_scan_by_key(thrust::cuda::par(caching), scan_key, scan_key + n_weights,
                                 scan_val, weights_cdf.begin());
 

src/common/stats.h

@@ -112,7 +112,7 @@ void Median(Context const* ctx, linalg::TensorView<float const, 2> t, OptionalWe
 
 void Mean(Context const* ctx, linalg::VectorView<float const> v, linalg::VectorView<float> out);
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 inline void Median(Context const*, linalg::TensorView<float const, 2>, OptionalWeights,
                    linalg::Tensor<float, 1>*) {
   common::AssertGPUSupport();
@@ -120,7 +120,7 @@ inline void Median(Context const*, linalg::TensorView<float const, 2>, OptionalW
 inline void Mean(Context const*, linalg::VectorView<float const>, linalg::VectorView<float>) {
   common::AssertGPUSupport();
 }
-#endif  // !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#endif  // !defined(XGBOOST_USE_CUDA)
 }  // namespace cuda_impl
 
 /**

src/common/stats.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "stats.cu"
-#endif

src/common/survival_util.h

@@ -25,12 +25,12 @@ DECLARE_FIELD_ENUM_CLASS(xgboost::common::ProbabilityDistributionType);
 namespace xgboost {
 namespace common {
 
-#if !defined(__CUDACC__) && !defined(__HIPCC__)
+#ifndef __CUDACC__
 
 using std::log;
 using std::fmax;
 
-#endif  // __CUDACC__ && __HIPCC__
+#endif  // __CUDACC__
 
 enum class CensoringType : uint8_t {
   kUncensored, kRightCensored, kLeftCensored, kIntervalCensored

src/common/threading_utils.cuh

@@ -59,11 +59,9 @@ std::size_t SegmentedTrapezoidThreads(xgboost::common::Span<U> group_ptr,
   });
   dh::InclusiveSum(out_group_threads_ptr.data(), out_group_threads_ptr.data(),
                    out_group_threads_ptr.size());
-  size_t total = 0;
-
+  std::size_t total = 0;
   dh::safe_cuda(cudaMemcpy(&total, out_group_threads_ptr.data() + out_group_threads_ptr.size() - 1,
-      sizeof(total), cudaMemcpyDeviceToHost));
-
+                           sizeof(total), cudaMemcpyDeviceToHost));
   return total;
 }
 

src/common/transform.h

@@ -19,9 +19,7 @@
 
 #if defined (__CUDACC__)
 #include "device_helpers.cuh"
-#elif defined(__HIPCC__)
-#include "device_helpers.hip.h"
-#endif  // defined (__CUDACC__) || defined(__HIPCC__)
+#endif  // defined (__CUDACC__)
 
 namespace xgboost {
 namespace common {
@@ -30,7 +28,7 @@ constexpr size_t kBlockThreads = 256;
 
 namespace detail {
 
-#if defined(__CUDACC__) || defined(__HIPCC__)
+#if defined(__CUDACC__)
 template <typename Functor, typename... SpanType>
 __global__ void LaunchCUDAKernel(Functor _func, Range _range,
                                  SpanType... _spans) {
@@ -38,7 +36,7 @@ __global__ void LaunchCUDAKernel(Functor _func, Range _range,
     _func(i, _spans...);
   }
 }
-#endif  // defined(__CUDACC__) || defined(__HIPCC__)
+#endif  // defined(__CUDACC__)
 
 }  // namespace detail
 
@@ -129,7 +127,7 @@ class Transform {
       UnpackShard(device, _vectors...);
     }
 
-#if defined(__CUDACC__) || defined(__HIPCC__)
+#if defined(__CUDACC__)
     template <typename std::enable_if<CompiledWithCuda>::type* = nullptr,
               typename... HDV>
     void LaunchCUDA(Functor _func, HDV*... _vectors) const {
@@ -142,9 +140,7 @@ class Transform {
       // granularity is used in data vector.
       size_t shard_size = range_size;
       Range shard_range {0, static_cast<Range::DifferenceType>(shard_size)};
-
       dh::safe_cuda(cudaSetDevice(device_));
-
       const int kGrids =
           static_cast<int>(DivRoundUp(*(range_.end()), kBlockThreads));
       if (kGrids == 0) {
@@ -163,7 +159,7 @@ class Transform {
 
       LOG(FATAL) << "Not part of device code. WITH_CUDA: " << WITH_CUDA();
     }
-#endif  // defined(__CUDACC__) || defined(__HIPCC__)
+#endif  // defined(__CUDACC__)
 
     template <typename... HDV>
     void LaunchCPU(Functor func, HDV *...vectors) const {

src/context.cc

@@ -28,7 +28,7 @@ Context::Context() : cfs_cpu_count_{common::GetCfsCPUCount()} {}
 namespace {
 inline constexpr char const* kDevice = "device";
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 DeviceOrd CUDAOrdinal(DeviceOrd device, bool) {
   device = DeviceOrd::CPU();
   return device;
@@ -208,10 +208,10 @@ std::int32_t Context::Threads() const {
   return n_threads;
 }
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 CUDAContext const* Context::CUDACtx() const {
   common::AssertGPUSupport();
   return nullptr;
 }
-#endif  // defined(XGBOOST_USE_CUDA) || defined(XGBOOST_USE_HIP)
+#endif  // defined(XGBOOST_USE_CUDA)
 }  // namespace xgboost

src/context.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "context.cu"
-#endif

src/data/array_interface.cu

@@ -20,9 +20,7 @@ void ArrayInterfaceHandler::SyncCudaStream(std::int64_t stream) {
        *   case where 0 might be given should either use None, 1, or 2 instead for
        *   clarity.
        */
-#ifndef XGBOOST_USE_HIP
       LOG(FATAL) << "Invalid stream ID in array interface: " << stream;
-#endif
     case 1:
       // default legacy stream
       break;
@@ -40,8 +38,6 @@ bool ArrayInterfaceHandler::IsCudaPtr(void const* ptr) {
   if (!ptr) {
     return false;
   }
-
-#if defined(XGBOOST_USE_CUDA)
   cudaPointerAttributes attr;
   auto err = cudaPointerGetAttributes(&attr, ptr);
   // reset error
@@ -63,34 +59,5 @@ bool ArrayInterfaceHandler::IsCudaPtr(void const* ptr) {
     // other errors, `cudaErrorNoDevice`, `cudaErrorInsufficientDriver` etc.
     return false;
   }
-#elif defined(XGBOOST_USE_HIP)
-  hipPointerAttribute_t attr;
-  auto err = hipPointerGetAttributes(&attr, ptr);
-  // reset error
-  CHECK_EQ(err, hipGetLastError());
-  if (err == hipErrorInvalidValue) {
-    return false;
-  } else if (err == hipSuccess) {
-#if HIP_VERSION_MAJOR < 6
-    switch (attr.memoryType) {
-      case hipMemoryTypeHost:
-        return false;
-      default:
-        return true;
-    }
-#else
-    switch (attr.type) {
-      case hipMemoryTypeUnregistered:
-      case hipMemoryTypeHost:
-        return false;
-      default:
-        return true;
-    }
-#endif
-    return true;
-  } else {
-    return false;
-  }
-#endif
 }
 }  // namespace xgboost

src/data/array_interface.h

@@ -28,8 +28,6 @@
 
 #if defined(XGBOOST_USE_CUDA)
 #include "cuda_fp16.h"
-#elif defined(XGBOOST_USE_HIP)
-#include <hip/hip_fp16.h>
 #endif
 
 namespace xgboost {
@@ -310,12 +308,12 @@ class ArrayInterfaceHandler {
 template <typename T, typename E = void>
 struct ToDType;
 // float
-#if defined(XGBOOST_USE_CUDA) || defined(XGBOOST_USE_HIP)
+#if defined(XGBOOST_USE_CUDA)
 template <>
 struct ToDType<__half> {
   static constexpr ArrayInterfaceHandler::Type kType = ArrayInterfaceHandler::kF2;
 };
-#endif  // defined(XGBOOST_USE_CUDA) || defined(XGBOOST_USE_HIP)
+#endif  // defined(XGBOOST_USE_CUDA)
 template <>
 struct ToDType<float> {
   static constexpr ArrayInterfaceHandler::Type kType = ArrayInterfaceHandler::kF4;
@@ -364,10 +362,10 @@ struct ToDType<int64_t> {
   static constexpr ArrayInterfaceHandler::Type kType = ArrayInterfaceHandler::kI8;
 };
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 inline void ArrayInterfaceHandler::SyncCudaStream(int64_t) { common::AssertGPUSupport(); }
 inline bool ArrayInterfaceHandler::IsCudaPtr(void const *) { return false; }
-#endif  // !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#endif  // !defined(XGBOOST_USE_CUDA)
 
 /**
  * \brief A type erased view over __array_interface__ protocol defined by numpy
@@ -465,11 +463,11 @@ class ArrayInterface {
       CHECK(sizeof(long double) == 16) << error::NoF128();
       type = T::kF16;
     } else if (typestr[1] == 'f' && typestr[2] == '2') {
-#if defined(XGBOOST_USE_CUDA) || defined(XGBOOST_USE_HIP)
+#if defined(XGBOOST_USE_CUDA)
       type = T::kF2;
 #else
       LOG(FATAL) << "Half type is not supported.";
-#endif  // defined(XGBOOST_USE_CUDA) || defined(XGBOOST_USE_HIP)
+#endif  // defined(XGBOOST_USE_CUDA)
     } else if (typestr[1] == 'f' && typestr[2] == '4') {
       type = T::kF4;
     } else if (typestr[1] == 'f' && typestr[2] == '8') {
@@ -504,15 +502,15 @@ class ArrayInterface {
     using T = ArrayInterfaceHandler::Type;
     switch (type) {
       case T::kF2: {
-#if defined(XGBOOST_USE_CUDA) || defined(XGBOOST_USE_HIP)
+#if defined(XGBOOST_USE_CUDA)
         return func(reinterpret_cast<__half const *>(data));
-#endif  // defined(XGBOOST_USE_CUDA) || || defined(XGBOOST_USE_HIP)
+#endif  // defined(XGBOOST_USE_CUDA)
       }
       case T::kF4:
         return func(reinterpret_cast<float const *>(data));
       case T::kF8:
         return func(reinterpret_cast<double const *>(data));
-#if defined(__CUDA_ARCH__ ) || defined(__HIPCC__)
+#ifdef __CUDA_ARCH__
       case T::kF16: {
         // CUDA device code doesn't support long double.
         SPAN_CHECK(false);
@@ -559,7 +557,7 @@ class ArrayInterface {
     static_assert(sizeof...(index) <= D, "Invalid index.");
     return this->DispatchCall([=](auto const *p_values) -> T {
       std::size_t offset = linalg::detail::Offset<0ul>(strides, 0ul, index...);
-#if defined(XGBOOST_USE_CUDA) || defined(XGBOOST_USE_HIP)
+#if defined(XGBOOST_USE_CUDA)
       // No operator defined for half -> size_t
       using Type = std::conditional_t<
           std::is_same<__half,
@@ -569,7 +567,7 @@ class ArrayInterface {
       return static_cast<T>(static_cast<Type>(p_values[offset]));
 #else
       return static_cast<T>(p_values[offset]);
-#endif  // defined(XGBOOST_USE_CUDA) || defined(XGBOOST_USE_HIP)
+#endif  // defined(XGBOOST_USE_CUDA)
     });
   }
 
@@ -606,7 +604,7 @@ void DispatchDType(ArrayInterface<D> const array, std::int32_t device, Fn fn) {
   };
   switch (array.type) {
     case ArrayInterfaceHandler::kF2: {
-#if defined(XGBOOST_USE_CUDA) || defined(XGBOOST_USE_HIP)
+#if defined(XGBOOST_USE_CUDA)
       dispatch(__half{});
 #endif
       break;

src/data/array_interface.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "array_interface.cu"
-#endif

src/data/data.cc

@@ -800,9 +800,9 @@ void MetaInfo::Validate(std::int32_t device) const {
   }
 }
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 void MetaInfo::SetInfoFromCUDA(Context const&, StringView, Json) { common::AssertGPUSupport(); }
-#endif  // !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#endif  // !defined(XGBOOST_USE_CUDA)
 
 bool MetaInfo::IsVerticalFederated() const {
   return collective::IsFederated() && IsColumnSplit();

src/data/data.cu

@@ -44,7 +44,6 @@ void CopyTensorInfoImpl(CUDAContext const* ctx, Json arr_interface, linalg::Tens
       std::copy(array.shape, array.shape + D, shape.data());
       // set data
       data->Resize(array.n);
-
       dh::safe_cuda(cudaMemcpyAsync(data->DevicePointer(), array.data, array.n * sizeof(T),
                                     cudaMemcpyDefault, ctx->Stream()));
     });
@@ -96,10 +95,8 @@ void CopyQidImpl(ArrayInterface<1> array_interface, std::vector<bst_group_t>* p_
     }
   });
   bool non_dec = true;
-
   dh::safe_cuda(cudaMemcpy(&non_dec, flag.data().get(), sizeof(bool),
                            cudaMemcpyDeviceToHost));
-
   CHECK(non_dec) << "`qid` must be sorted in increasing order along with data.";
   size_t bytes = 0;
   dh::caching_device_vector<uint32_t> out(array_interface.Shape(0));
@@ -117,10 +114,8 @@ void CopyQidImpl(ArrayInterface<1> array_interface, std::vector<bst_group_t>* p_
   group_ptr_.clear();
   group_ptr_.resize(h_num_runs_out + 1, 0);
   dh::XGBCachingDeviceAllocator<char> alloc;
-
   thrust::inclusive_scan(thrust::cuda::par(alloc), cnt.begin(),
                          cnt.begin() + h_num_runs_out, cnt.begin());
-
   thrust::copy(cnt.begin(), cnt.begin() + h_num_runs_out,
                group_ptr_.begin() + 1);
 }

src/data/data.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "data.cu"
-#endif

src/data/device_adapter.cuh

@@ -122,9 +122,7 @@ class CudfAdapter : public detail::SingleBatchDataIter<CudfAdapterBatch> {
 
     device_idx_ = dh::CudaGetPointerDevice(first_column.data);
     CHECK_NE(device_idx_, Context::kCpuId);
-
     dh::safe_cuda(cudaSetDevice(device_idx_));
-
     for (auto& json_col : json_columns) {
       auto column = ArrayInterface<1>(get<Object const>(json_col));
       columns.push_back(column);
@@ -213,7 +211,6 @@ template <typename AdapterBatchT>
 std::size_t GetRowCounts(const AdapterBatchT batch, common::Span<bst_row_t> offset, int device_idx,
                          float missing) {
   dh::safe_cuda(cudaSetDevice(device_idx));
-
   IsValidFunctor is_valid(missing);
   dh::safe_cuda(cudaMemsetAsync(offset.data(), '\0', offset.size_bytes()));
 
@@ -247,7 +244,6 @@ std::size_t GetRowCounts(const AdapterBatchT batch, common::Span<bst_row_t> offs
                   &offset[ridx]),
               static_cast<unsigned long long>(cnt));  // NOLINT
   });
-
   dh::XGBCachingDeviceAllocator<char> alloc;
   bst_row_t row_stride =
       dh::Reduce(thrust::cuda::par(alloc), thrust::device_pointer_cast(offset.data()),

src/data/ellpack_page.cc

@@ -1,7 +1,7 @@
 /**
  * Copyright 2019-2023, XGBoost contributors
  */
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#ifndef XGBOOST_USE_CUDA
 
 #include "ellpack_page.h"
 
@@ -52,4 +52,5 @@ size_t EllpackPage::Size() const {
   return impl_->Cuts();
 }
 }  // namespace xgboost
-#endif  // XGBOOST_USE_CUDA || XGBOOST_USE_HIP
+
+#endif  // XGBOOST_USE_CUDA

src/data/ellpack_page.cu

@@ -18,10 +18,6 @@
 #include "gradient_index.h"
 #include "xgboost/data.h"
 
-#if defined(XGBOOST_USE_HIP)
-#include <rocprim/rocprim.hpp>
-#endif
-
 namespace xgboost {
 
 EllpackPage::EllpackPage() : impl_{new EllpackPageImpl()} {}
@@ -106,7 +102,6 @@ EllpackPageImpl::EllpackPageImpl(int device, common::HistogramCuts cuts,
       row_stride(row_stride),
       n_rows(n_rows) {
   monitor_.Init("ellpack_page");
-
   dh::safe_cuda(cudaSetDevice(device));
 
   monitor_.Start("InitCompressedData");
@@ -261,8 +256,6 @@ void CopyDataToEllpack(const AdapterBatchT& batch, common::Span<FeatureType cons
   // Go one level down into cub::DeviceScan API to set OffsetT as 64 bit
   // So we don't crash on n > 2^31
   size_t temp_storage_bytes = 0;
-
-#if defined(__CUDACC__)
   using DispatchScan =
       cub::DispatchScan<decltype(key_value_index_iter), decltype(out),
                         TupleScanOp<Tuple>, cub::NullType, int64_t>;
@@ -285,17 +278,6 @@ void CopyDataToEllpack(const AdapterBatchT& batch, common::Span<FeatureType cons
                          key_value_index_iter, out, TupleScanOp<Tuple>(),
                          cub::NullType(), batch.Size(), nullptr, false);
 #endif
-
-#elif defined (__HIPCC__)
-
-  rocprim::inclusive_scan(nullptr, temp_storage_bytes, key_value_index_iter, out, batch.Size(), TupleScanOp<Tuple>());
-
-  dh::TemporaryArray<char> temp_storage(temp_storage_bytes);
-
-  rocprim::inclusive_scan(temp_storage.data().get(), temp_storage_bytes, key_value_index_iter, out, batch.Size(),
-       TupleScanOp<Tuple>());
-
-#endif
 }
 
 void WriteNullValues(EllpackPageImpl* dst, int device_idx,
@@ -552,13 +534,11 @@ void EllpackPageImpl::CreateHistIndices(int device,
     // copy data entries to device.
     if (row_batch.data.DeviceCanRead()) {
       auto const& d_data = row_batch.data.ConstDeviceSpan();
-
       dh::safe_cuda(cudaMemcpyAsync(
           entries_d.data().get(), d_data.data() + ent_cnt_begin,
           n_entries * sizeof(Entry), cudaMemcpyDefault));
     } else {
       const std::vector<Entry>& data_vec = row_batch.data.ConstHostVector();
-
       dh::safe_cuda(cudaMemcpyAsync(
           entries_d.data().get(), data_vec.data() + ent_cnt_begin,
           n_entries * sizeof(Entry), cudaMemcpyDefault));

src/data/ellpack_page.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "ellpack_page.cu"
-#endif

src/data/ellpack_page_raw_format.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "ellpack_page_raw_format.cu"
-#endif

src/data/ellpack_page_source.h

@@ -45,7 +45,7 @@ class EllpackPageSource : public PageSourceIncMixIn<EllpackPage> {
   void Fetch() final;
 };
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 inline void EllpackPageSource::Fetch() {
   // silent the warning about unused variables.
   (void)(row_stride_);

src/data/ellpack_page_source.hip

@@ -1,4 +0,0 @@
-
-#if defined(XGBOOST_USE_HIP)
-#include "ellpack_page_source.cu"
-#endif

src/data/gradient_index.cc

@@ -65,12 +65,12 @@ GHistIndexMatrix::GHistIndexMatrix(MetaInfo const &info, common::HistogramCuts &
       max_numeric_bins_per_feat(max_bin_per_feat),
       isDense_{info.num_col_ * info.num_row_ == info.num_nonzero_} {}
 
-#if !defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#if !defined(XGBOOST_USE_CUDA)
 GHistIndexMatrix::GHistIndexMatrix(Context const *, MetaInfo const &, EllpackPage const &,
                                    BatchParam const &) {
   common::AssertGPUSupport();
 }
-#endif  // defined(XGBOOST_USE_CUDA) && !defined(XGBOOST_USE_HIP)
+#endif  // defined(XGBOOST_USE_CUDA)
 
 GHistIndexMatrix::~GHistIndexMatrix() = default;