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Config: Move LLVM_HAS_*_TARGET definitions to a new header.
When enabling or disabling a target we typically need to rebuild most of LLVM because of the change to the values of the LLVM_HAS_*_TARGET macros in llvm-config.h, which is included by most of the code, but are unused by LLVM itself. To avoid this, move the LLVM_HAS_*_TARGET macros to a separate header, Targets.h. Update the only in-tree user of the macros (MLIR) to refer to the new header. I expect that out-of-tree users will detect the change either at compile time if they build with -Wundef, or at runtime. As far as I can tell, the usage of these macros is rare in out-of-tree projects, I found no out-of-tree users in projects indexed by Debian code search [1], and one user [2] in projects indexed by GitHub code search [3] (excluding forks of LLVM). [1] https://codesearch.debian.net/search?q=%23.*LLVM_HAS_.*_TARGET&literal=0 [2] https://github.com/AndreyPavlenko/graph-compiler/blob/238706b12b63945dc490f9f5f33a2d20b3c58944/lib/gc/Target/LLVM/XeVM/Target.cpp#L72 [3] https://github.com/search?q=%2F%23.*LLVM_HAS_.*_TARGET%2F&type=code Reviewers: nico, grypp, mstorsjo, MaskRay Reviewed By: MaskRay Pull Request: #136388
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6 files changed

+106
-79
lines changed

6 files changed

+106
-79
lines changed

‎llvm/CMakeLists.txt

Lines changed: 4 additions & 1 deletion
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@@ -1163,13 +1163,16 @@ if (NOT TENSORFLOW_AOT_PATH STREQUAL "")
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endif()
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# Configure the three LLVM configuration header files.
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# Configure the LLVM configuration header files.
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configure_file(
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${LLVM_MAIN_INCLUDE_DIR}/llvm/Config/config.h.cmake
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${LLVM_INCLUDE_DIR}/llvm/Config/config.h)
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configure_file(
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${LLVM_MAIN_INCLUDE_DIR}/llvm/Config/llvm-config.h.cmake
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${LLVM_INCLUDE_DIR}/llvm/Config/llvm-config.h)
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configure_file(
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${LLVM_MAIN_INCLUDE_DIR}/llvm/Config/Targets.h.cmake
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${LLVM_INCLUDE_DIR}/llvm/Config/Targets.h)
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configure_file(
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${LLVM_MAIN_INCLUDE_DIR}/llvm/Config/abi-breaking.h.cmake
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${LLVM_INCLUDE_DIR}/llvm/Config/abi-breaking.h)

‎llvm/include/llvm/Config/Targets.h.cmake

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@@ -0,0 +1,90 @@
1+
/*===------- llvm/Config/Targets.h - LLVM target checks -----------*- C -*-===*/
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/* */
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/* Part of the LLVM Project, under the Apache License v2.0 with LLVM */
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/* Exceptions. */
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/* See https://llvm.org/LICENSE.txt for license information. */
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/* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception */
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/* */
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/*===----------------------------------------------------------------------===*/
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/* This file enables clients to know whether specific targets are enabled. */
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#ifndef LLVM_CONFIG_TARGETS_H
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#define LLVM_CONFIG_TARGETS_H
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/* Define if the AArch64 target is built in */
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#cmakedefine01 LLVM_HAS_AARCH64_TARGET
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/* Define if the AMDGPU target is built in */
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#cmakedefine01 LLVM_HAS_AMDGPU_TARGET
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/* Define if the ARC target is built in */
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#cmakedefine01 LLVM_HAS_ARC_TARGET
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/* Define if the ARM target is built in */
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#cmakedefine01 LLVM_HAS_ARM_TARGET
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/* Define if the AVR target is built in */
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#cmakedefine01 LLVM_HAS_AVR_TARGET
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/* Define if the BPF target is built in */
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#cmakedefine01 LLVM_HAS_BPF_TARGET
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/* Define if the CSKY target is built in */
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#cmakedefine01 LLVM_HAS_CSKY_TARGET
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/* Define if the DirectX target is built in */
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#cmakedefine01 LLVM_HAS_DIRECTX_TARGET
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/* Define if the Hexagon target is built in */
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#cmakedefine01 LLVM_HAS_HEXAGON_TARGET
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/* Define if the Lanai target is built in */
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#cmakedefine01 LLVM_HAS_LANAI_TARGET
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/* Define if the LoongArch target is built in */
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#cmakedefine01 LLVM_HAS_LOONGARCH_TARGET
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/* Define if the M68k target is built in */
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#cmakedefine01 LLVM_HAS_M68K_TARGET
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/* Define if the Mips target is built in */
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#cmakedefine01 LLVM_HAS_MIPS_TARGET
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/* Define if the MSP430 target is built in */
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#cmakedefine01 LLVM_HAS_MSP430_TARGET
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/* Define if the NVPTX target is built in */
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#cmakedefine01 LLVM_HAS_NVPTX_TARGET
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/* Define if the PowerPC target is built in */
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#cmakedefine01 LLVM_HAS_POWERPC_TARGET
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/* Define if the RISCV target is built in */
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#cmakedefine01 LLVM_HAS_RISCV_TARGET
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/* Define if the Sparc target is built in */
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#cmakedefine01 LLVM_HAS_SPARC_TARGET
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/* Define if the SPIRV target is built in */
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#cmakedefine01 LLVM_HAS_SPIRV_TARGET
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/* Define if the SystemZ target is built in */
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#cmakedefine01 LLVM_HAS_SYSTEMZ_TARGET
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/* Define if the VE target is built in */
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#cmakedefine01 LLVM_HAS_VE_TARGET
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/* Define if the WebAssembly target is built in */
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#cmakedefine01 LLVM_HAS_WEBASSEMBLY_TARGET
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/* Define if the X86 target is built in */
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#cmakedefine01 LLVM_HAS_X86_TARGET
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/* Define if the XCore target is built in */
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#cmakedefine01 LLVM_HAS_XCORE_TARGET
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/* Define if the Xtensa target is built in */
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#cmakedefine01 LLVM_HAS_XTENSA_TARGET
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#endif

‎llvm/include/llvm/Config/llvm-config.h.cmake

Lines changed: 0 additions & 75 deletions
Original file line numberDiff line numberDiff line change
@@ -54,81 +54,6 @@
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/* LLVM name for the native target MCA init function, if available */
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#cmakedefine LLVM_NATIVE_TARGETMCA LLVMInitialize${LLVM_NATIVE_ARCH}TargetMCA
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/* Define if the AArch64 target is built in */
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#cmakedefine01 LLVM_HAS_AARCH64_TARGET
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/* Define if the AMDGPU target is built in */
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#cmakedefine01 LLVM_HAS_AMDGPU_TARGET
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/* Define if the ARC target is built in */
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#cmakedefine01 LLVM_HAS_ARC_TARGET
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/* Define if the ARM target is built in */
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#cmakedefine01 LLVM_HAS_ARM_TARGET
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/* Define if the AVR target is built in */
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#cmakedefine01 LLVM_HAS_AVR_TARGET
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/* Define if the BPF target is built in */
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#cmakedefine01 LLVM_HAS_BPF_TARGET
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/* Define if the CSKY target is built in */
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#cmakedefine01 LLVM_HAS_CSKY_TARGET
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/* Define if the DirectX target is built in */
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#cmakedefine01 LLVM_HAS_DIRECTX_TARGET
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/* Define if the Hexagon target is built in */
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#cmakedefine01 LLVM_HAS_HEXAGON_TARGET
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/* Define if the Lanai target is built in */
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#cmakedefine01 LLVM_HAS_LANAI_TARGET
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/* Define if the LoongArch target is built in */
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#cmakedefine01 LLVM_HAS_LOONGARCH_TARGET
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/* Define if the M68k target is built in */
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#cmakedefine01 LLVM_HAS_M68K_TARGET
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/* Define if the Mips target is built in */
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#cmakedefine01 LLVM_HAS_MIPS_TARGET
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/* Define if the MSP430 target is built in */
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#cmakedefine01 LLVM_HAS_MSP430_TARGET
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/* Define if the NVPTX target is built in */
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#cmakedefine01 LLVM_HAS_NVPTX_TARGET
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/* Define if the PowerPC target is built in */
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#cmakedefine01 LLVM_HAS_POWERPC_TARGET
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/* Define if the RISCV target is built in */
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#cmakedefine01 LLVM_HAS_RISCV_TARGET
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/* Define if the Sparc target is built in */
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#cmakedefine01 LLVM_HAS_SPARC_TARGET
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/* Define if the SPIRV target is built in */
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#cmakedefine01 LLVM_HAS_SPIRV_TARGET
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/* Define if the SystemZ target is built in */
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#cmakedefine01 LLVM_HAS_SYSTEMZ_TARGET
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/* Define if the VE target is built in */
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#cmakedefine01 LLVM_HAS_VE_TARGET
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/* Define if the WebAssembly target is built in */
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#cmakedefine01 LLVM_HAS_WEBASSEMBLY_TARGET
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/* Define if the X86 target is built in */
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#cmakedefine01 LLVM_HAS_X86_TARGET
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/* Define if the XCore target is built in */
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#cmakedefine01 LLVM_HAS_XCORE_TARGET
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/* Define if the Xtensa target is built in */
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#cmakedefine01 LLVM_HAS_XTENSA_TARGET
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/* Define if this is Unixish platform */
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#cmakedefine LLVM_ON_UNIX ${LLVM_ON_UNIX}
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‎llvm/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn

Lines changed: 10 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -74,7 +74,10 @@ write_cmake_config("abi-breaking") {
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}
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write_cmake_config("config") {
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public_deps = [ ":llvm-config" ]
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public_deps = [
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":Targets",
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":llvm-config",
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]
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input = "config.h.cmake"
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output = "$target_gen_dir/config.h"
@@ -384,6 +387,12 @@ write_cmake_config("llvm-config") {
384387
} else {
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values += [ "LLVM_FORCE_ENABLE_STATS=" ]
386389
}
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}
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write_cmake_config("Targets") {
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input = "Targets.h.cmake"
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output = "$target_gen_dir/Targets.h"
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values = []
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388397
if (llvm_build_AArch64) {
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values += [ "LLVM_HAS_AARCH64_TARGET=1" ]

‎mlir/lib/Target/LLVM/NVVM/Target.cpp

Lines changed: 1 addition & 1 deletion
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@@ -27,7 +27,7 @@
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#include "mlir/Target/LLVMIR/Export.h"
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#include "llvm/ADT/ScopeExit.h"
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#include "llvm/Config/llvm-config.h"
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#include "llvm/Config/Targets.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/FileUtilities.h"
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#include "llvm/Support/FormatVariadic.h"

‎mlir/unittests/Target/LLVM/SerializeNVVMTarget.cpp

Lines changed: 1 addition & 1 deletion
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@@ -19,7 +19,7 @@
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#include "mlir/Target/LLVMIR/Dialect/NVVM/NVVMToLLVMIRTranslation.h"
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#include "llvm/Bitcode/BitcodeWriter.h"
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#include "llvm/Config/llvm-config.h" // for LLVM_HAS_NVPTX_TARGET
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#include "llvm/Config/Targets.h" // for LLVM_HAS_NVPTX_TARGET
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#include "llvm/IRReader/IRReader.h"
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#include "llvm/Support/MemoryBufferRef.h"
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#include "llvm/Support/Process.h"

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