[clang] [Clang] Rework LTO mode selection to be a Toolchain property (PR #201155)

LLVM Continuous Integration via cfe-commits Wed, 03 Jun 2026 06:49:16 -0700

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `amdgpu-offload-build-only` 
running on `AMD-bb-w-01` while building `clang` at step 4 "annotate".


Full details are available at: 
https://lab.llvm.org/buildbot/#/builders/226/builds/8423

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 4 (annotate) failure: 
'../llvm-zorg/zorg/buildbot/builders/annotated/amdgpu-offload-cmake.py 
--jobs=32' (failure)
...
[5355/8633] Linking CXX shared library lib/libMLIRXeVMTarget.so.23.0git
[5356/8633] Creating library symlink lib/libMLIRXeVMTarget.so
[5357/8633] Linking CXX shared library lib/libCUFAttrs.so.23.0git
[5358/8633] Creating library symlink lib/libCUFAttrs.so
[5359/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Fuchsia.cpp.o
[5360/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/HIPAMD.cpp.o
[5361/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/CreateInvocationFromArgs.cpp.o
[5362/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Managarm.cpp.o
[5363/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/MipsLinux.cpp.o
[5364/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Clang.cpp.o
FAILED: 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Clang.cpp.o 
ccache /opt/rh/gcc-toolset-13/root/usr/bin/c++ -DCLANG_EXPORTS -D_DEBUG 
-D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE 
-D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE 
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS 
-I/home/botworker/bbot/amdgpu-offload-build-only/build/tools/clang/lib/Driver 
-I/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/lib/Driver 
-I/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/include 
-I/home/botworker/bbot/amdgpu-offload-build-only/build/tools/clang/include 
-I/home/botworker/bbot/amdgpu-offload-build-only/build/include 
-I/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/llvm/include 
-fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time 
-Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual 
-Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough 
-Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-dangling-reference 
-Wno-redundant-move -Wno-pessimizing-move -Wno-array-bounds 
-Wno-stringop-overread -Wno-dangling-pointer -Wno-noexcept-type 
-Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment 
-Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color 
-ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -O3 
-DNDEBUG -std=c++17 -UNDEBUG -fno-exceptions -funwind-tables -fno-rtti -MD -MT 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Clang.cpp.o 
-MF 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Clang.cpp.o.d 
-o tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Clang.cpp.o 
-c 
/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/lib/Driver/ToolChains/Clang.cpp
/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/lib/Driver/ToolChains/Clang.cpp:
 In member function ‘virtual void 
clang::driver::tools::LinkerWrapper::ConstructJob(clang::driver::Compilation&, 
const clang::driver::JobAction&, const clang::driver::InputInfo&, const 
clang::driver::InputInfoList&, const llvm::opt::ArgList&, const char*) const’:
/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/lib/Driver/ToolChains/Clang.cpp:9832:23:
 error: ‘const class clang::driver::Driver’ has no member named 
‘getOffloadLTOMode’; did you mean ‘enum clang::driver::Driver::OffloadMode’? 
(not accessible from this context)
 9832 |     if (C.getDriver().getOffloadLTOMode() == LTOK_None && 
!UsesProfileGenerate)
      |                       ^~~~~~~~~~~~~~~~~
In file included from 
/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/include/clang/Driver/CudaInstallationDetector.h:13,
                 from 
/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/lib/Driver/ToolChains/MSVC.h:13,
                 from 
/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/lib/Driver/ToolChains/Clang.h:12,
                 from 
/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/lib/Driver/ToolChains/Clang.cpp:9:
/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/include/clang/Driver/Driver.h:120:8:
 note: declared private here
  120 |   enum OffloadMode {
      |        ^~~~~~~~~~~
[5365/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Hurd.cpp.o
[5366/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/HIPUtility.cpp.o
[5367/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Hexagon.cpp.o
[5368/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/SPIRVOpenMP.cpp.o
[5369/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/TCE.cpp.o
[5370/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/OpenBSD.cpp.o
[5371/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/NetBSD.cpp.o
[5372/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/SYCL.cpp.o
[5373/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Solaris.cpp.o
[5374/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Darwin.cpp.o
[5375/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Serenity.cpp.o
[5376/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/MinGW.cpp.o
[5377/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/SPIRV.cpp.o
[5378/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Linux.cpp.o
[5379/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Gnu.cpp.o
[5380/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/MSVC.cpp.o
[5381/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/UEFI.cpp.o
[5382/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/XCore.cpp.o
[5383/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/MSP430.cpp.o
[5384/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/VEToolchain.cpp.o
[5385/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/PS4CPU.cpp.o
[5386/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/HLSL.cpp.o
[5387/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/OHOS.cpp.o
[5388/8633] Building AMDGPUGenGlobalISel.inc...
[5389/8633] Building AMDGPUGenDAGISel.inc...
[5390/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/WebAssembly.cpp.o
Step 7 (build cmake config) failure: build cmake config (failure)
...
[5355/8633] Linking CXX shared library lib/libMLIRXeVMTarget.so.23.0git
[5356/8633] Creating library symlink lib/libMLIRXeVMTarget.so
[5357/8633] Linking CXX shared library lib/libCUFAttrs.so.23.0git
[5358/8633] Creating library symlink lib/libCUFAttrs.so
[5359/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Fuchsia.cpp.o
[5360/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/HIPAMD.cpp.o
[5361/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/CreateInvocationFromArgs.cpp.o
[5362/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Managarm.cpp.o
[5363/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/MipsLinux.cpp.o
[5364/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Clang.cpp.o
FAILED: 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Clang.cpp.o 
ccache /opt/rh/gcc-toolset-13/root/usr/bin/c++ -DCLANG_EXPORTS -D_DEBUG 
-D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE 
-D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE 
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS 
-I/home/botworker/bbot/amdgpu-offload-build-only/build/tools/clang/lib/Driver 
-I/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/lib/Driver 
-I/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/include 
-I/home/botworker/bbot/amdgpu-offload-build-only/build/tools/clang/include 
-I/home/botworker/bbot/amdgpu-offload-build-only/build/include 
-I/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/llvm/include 
-fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time 
-Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual 
-Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough 
-Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-dangling-reference 
-Wno-redundant-move -Wno-pessimizing-move -Wno-array-bounds 
-Wno-stringop-overread -Wno-dangling-pointer -Wno-noexcept-type 
-Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment 
-Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color 
-ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -O3 
-DNDEBUG -std=c++17 -UNDEBUG -fno-exceptions -funwind-tables -fno-rtti -MD -MT 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Clang.cpp.o 
-MF 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Clang.cpp.o.d 
-o tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Clang.cpp.o 
-c 
/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/lib/Driver/ToolChains/Clang.cpp
/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/lib/Driver/ToolChains/Clang.cpp:
 In member function ‘virtual void 
clang::driver::tools::LinkerWrapper::ConstructJob(clang::driver::Compilation&, 
const clang::driver::JobAction&, const clang::driver::InputInfo&, const 
clang::driver::InputInfoList&, const llvm::opt::ArgList&, const char*) const’:
/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/lib/Driver/ToolChains/Clang.cpp:9832:23:
 error: ‘const class clang::driver::Driver’ has no member named 
‘getOffloadLTOMode’; did you mean ‘enum clang::driver::Driver::OffloadMode’? 
(not accessible from this context)
 9832 |     if (C.getDriver().getOffloadLTOMode() == LTOK_None && 
!UsesProfileGenerate)
      |                       ^~~~~~~~~~~~~~~~~
In file included from 
/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/include/clang/Driver/CudaInstallationDetector.h:13,
                 from 
/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/lib/Driver/ToolChains/MSVC.h:13,
                 from 
/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/lib/Driver/ToolChains/Clang.h:12,
                 from 
/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/lib/Driver/ToolChains/Clang.cpp:9:
/home/botworker/bbot/amdgpu-offload-build-only/llvm-project/clang/include/clang/Driver/Driver.h:120:8:
 note: declared private here
  120 |   enum OffloadMode {
      |        ^~~~~~~~~~~
[5365/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Hurd.cpp.o
[5366/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/HIPUtility.cpp.o
[5367/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Hexagon.cpp.o
[5368/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/SPIRVOpenMP.cpp.o
[5369/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/TCE.cpp.o
[5370/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/OpenBSD.cpp.o
[5371/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/NetBSD.cpp.o
[5372/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/SYCL.cpp.o
[5373/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Solaris.cpp.o
[5374/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Darwin.cpp.o
[5375/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Serenity.cpp.o
[5376/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/MinGW.cpp.o
[5377/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/SPIRV.cpp.o
[5378/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Linux.cpp.o
[5379/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/Gnu.cpp.o
[5380/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/MSVC.cpp.o
[5381/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/UEFI.cpp.o
[5382/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/XCore.cpp.o
[5383/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/MSP430.cpp.o
[5384/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/VEToolchain.cpp.o
[5385/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/PS4CPU.cpp.o
[5386/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/HLSL.cpp.o
[5387/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/OHOS.cpp.o
[5388/8633] Building AMDGPUGenGlobalISel.inc...
[5389/8633] Building AMDGPUGenDAGISel.inc...
[5390/8633] Building CXX object 
tools/clang/lib/Driver/CMakeFiles/obj.clangDriver.dir/ToolChains/WebAssembly.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/201155
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[clang] [Clang] Rework LTO mode selection to be a Toolchain property (PR #201155)

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