[clang] [flang] [llvm] Add IR Profile-Guided Optimization (IR PGO) support to the Flang compiler (PR #136098)

Fri May 30 07:20:12 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `amdgpu-offload-rhel-9-cmake-build-only` running on `rocm-docker-rhel-9` while building `clang,flang,llvm` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/205/builds/10879

<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)
...
[5073/7836] Creating library symlink lib/libLLVMAnalysis.so
[5074/7836] Linking CXX shared library lib/libMLIRTosaToArith.so.21.0git
[5075/7836] Linking CXX shared library lib/libMLIRTosaToSCF.so.21.0git
[5076/7836] Linking CXX shared library lib/libMLIRTosaToMLProgram.so.21.0git
[5077/7836] Linking CXX shared library lib/libMLIRLinalgDialect.so.21.0git
[5078/7836] Linking CXX shared library lib/libLLVMIRPrinter.so.21.0git
[5079/7836] Creating library symlink lib/libLLVMIRPrinter.so
[5080/7836] Linking CXX shared library lib/libLLVMFrontendAtomic.so.21.0git
[5081/7836] Creating library symlink lib/libLLVMFrontendAtomic.so
[5082/7836] Linking CXX shared library lib/libLLVMFrontendDriver.so.21.0git
FAILED: lib/libLLVMFrontendDriver.so.21.0git 
: && /usr/bin/c++ -fPIC -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-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG  -Wl,-z,defs -Wl,-z,nodelete   -Wl,-rpath-link,/home/botworker/bbot/amdgpu-offload-rhel-9-cmake-build-only/build/./lib  -Wl,--gc-sections -shared -Wl,-soname,libLLVMFrontendDriver.so.21.0git -o lib/libLLVMFrontendDriver.so.21.0git lib/Frontend/Driver/CMakeFiles/LLVMFrontendDriver.dir/CodeGenOptions.cpp.o  -Wl,-rpath,"\$ORIGIN/../lib:/home/botworker/bbot/amdgpu-offload-rhel-9-cmake-build-only/build/lib:"  lib/libLLVMAnalysis.so.21.0git  lib/libLLVMCore.so.21.0git  lib/libLLVMSupport.so.21.0git  -Wl,-rpath-link,/home/botworker/bbot/amdgpu-offload-rhel-9-cmake-build-only/build/lib && :
/usr/bin/ld: lib/Frontend/Driver/CMakeFiles/LLVMFrontendDriver.dir/CodeGenOptions.cpp.o: in function `llvm::driver::getDefaultProfileGenName[abi:cxx11]()':
CodeGenOptions.cpp:(.text._ZN4llvm6driver24getDefaultProfileGenNameB5cxx11Ev+0x3): undefined reference to `llvm::DebugInfoCorrelate'
/usr/bin/ld: CodeGenOptions.cpp:(.text._ZN4llvm6driver24getDefaultProfileGenNameB5cxx11Ev+0x21): undefined reference to `llvm::ProfileCorrelate'
collect2: error: ld returned 1 exit status
[5083/7836] Linking CXX shared library lib/libMLIRTosaToTensor.so.21.0git
[5084/7836] Linking CXX shared library lib/libMLIRMemRefTransforms.so.21.0git
[5085/7836] Linking CXX shared library lib/libLLVMBitWriter.so.21.0git
[5086/7836] Linking CXX shared library lib/libLLVMTarget.so.21.0git
[5087/7836] Linking CXX shared library lib/libLLVMSandboxIR.so.21.0git
[5088/7836] Building AMDGPUGenCallingConv.inc...
[5089/7836] Linking CXX shared library lib/libMLIRSPIRVDialect.so.21.0git
[5090/7836] Linking CXX shared library lib/libLLVMTransformUtils.so.21.0git
[5091/7836] Building AMDGPUGenSearchableTables.inc...
[5092/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/CodeGenOptions.cpp.o
[5093/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/Builtins.cpp.o
[5094/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/Targets/ARC.cpp.o
[5095/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/OpenCLOptions.cpp.o
[5096/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/ProfileList.cpp.o
/home/botworker/bbot/amdgpu-offload-rhel-9-cmake-build-only/llvm-project/clang/lib/Basic/ProfileList.cpp: In function ‘llvm::StringRef getSectionName(llvm::driver::ProfileInstrKind)’:
/home/botworker/bbot/amdgpu-offload-rhel-9-cmake-build-only/llvm-project/clang/lib/Basic/ProfileList.cpp:83:3: warning: case value ‘4’ not in enumerated type ‘llvm::driver::ProfileInstrKind’ [-Wswitch]
   83 |   case CodeGenOptions::ProfileIRSampleColdCov:
      |   ^~~~
[5097/7836] Building AMDGPUGenAsmWriter.inc...
[5098/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/TargetInfo.cpp.o
[5099/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/Targets/AMDGPU.cpp.o
[5100/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/Module.cpp.o
[5101/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/Targets/ARM.cpp.o
[5102/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/Targets/AArch64.cpp.o
[5103/7836] Building AMDGPUGenGlobalISel.inc...
[5104/7836] Building AMDGPUGenDAGISel.inc...
[5105/7836] Building AMDGPUGenAsmMatcher.inc...
[5106/7836] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/AsmPrinter.cpp.o
[5107/7836] Building CXX object tools/clang/lib/Frontend/Rewrite/CMakeFiles/obj.clangRewriteFrontend.dir/RewriteModernObjC.cpp.o
[5108/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/Attributes.cpp.o
[5109/7836] Building AMDGPUGenRegisterBank.inc...
[5110/7836] Building AMDGPUGenInstrInfo.inc...
[5111/7836] Building AMDGPUGenRegisterInfo.inc...
Step 7 (build cmake config) failure: build cmake config (failure)
...
[5073/7836] Creating library symlink lib/libLLVMAnalysis.so
[5074/7836] Linking CXX shared library lib/libMLIRTosaToArith.so.21.0git
[5075/7836] Linking CXX shared library lib/libMLIRTosaToSCF.so.21.0git
[5076/7836] Linking CXX shared library lib/libMLIRTosaToMLProgram.so.21.0git
[5077/7836] Linking CXX shared library lib/libMLIRLinalgDialect.so.21.0git
[5078/7836] Linking CXX shared library lib/libLLVMIRPrinter.so.21.0git
[5079/7836] Creating library symlink lib/libLLVMIRPrinter.so
[5080/7836] Linking CXX shared library lib/libLLVMFrontendAtomic.so.21.0git
[5081/7836] Creating library symlink lib/libLLVMFrontendAtomic.so
[5082/7836] Linking CXX shared library lib/libLLVMFrontendDriver.so.21.0git
FAILED: lib/libLLVMFrontendDriver.so.21.0git 
: && /usr/bin/c++ -fPIC -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-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG  -Wl,-z,defs -Wl,-z,nodelete   -Wl,-rpath-link,/home/botworker/bbot/amdgpu-offload-rhel-9-cmake-build-only/build/./lib  -Wl,--gc-sections -shared -Wl,-soname,libLLVMFrontendDriver.so.21.0git -o lib/libLLVMFrontendDriver.so.21.0git lib/Frontend/Driver/CMakeFiles/LLVMFrontendDriver.dir/CodeGenOptions.cpp.o  -Wl,-rpath,"\$ORIGIN/../lib:/home/botworker/bbot/amdgpu-offload-rhel-9-cmake-build-only/build/lib:"  lib/libLLVMAnalysis.so.21.0git  lib/libLLVMCore.so.21.0git  lib/libLLVMSupport.so.21.0git  -Wl,-rpath-link,/home/botworker/bbot/amdgpu-offload-rhel-9-cmake-build-only/build/lib && :
/usr/bin/ld: lib/Frontend/Driver/CMakeFiles/LLVMFrontendDriver.dir/CodeGenOptions.cpp.o: in function `llvm::driver::getDefaultProfileGenName[abi:cxx11]()':
CodeGenOptions.cpp:(.text._ZN4llvm6driver24getDefaultProfileGenNameB5cxx11Ev+0x3): undefined reference to `llvm::DebugInfoCorrelate'
/usr/bin/ld: CodeGenOptions.cpp:(.text._ZN4llvm6driver24getDefaultProfileGenNameB5cxx11Ev+0x21): undefined reference to `llvm::ProfileCorrelate'
collect2: error: ld returned 1 exit status
[5083/7836] Linking CXX shared library lib/libMLIRTosaToTensor.so.21.0git
[5084/7836] Linking CXX shared library lib/libMLIRMemRefTransforms.so.21.0git
[5085/7836] Linking CXX shared library lib/libLLVMBitWriter.so.21.0git
[5086/7836] Linking CXX shared library lib/libLLVMTarget.so.21.0git
[5087/7836] Linking CXX shared library lib/libLLVMSandboxIR.so.21.0git
[5088/7836] Building AMDGPUGenCallingConv.inc...
[5089/7836] Linking CXX shared library lib/libMLIRSPIRVDialect.so.21.0git
[5090/7836] Linking CXX shared library lib/libLLVMTransformUtils.so.21.0git
[5091/7836] Building AMDGPUGenSearchableTables.inc...
[5092/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/CodeGenOptions.cpp.o
[5093/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/Builtins.cpp.o
[5094/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/Targets/ARC.cpp.o
[5095/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/OpenCLOptions.cpp.o
[5096/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/ProfileList.cpp.o
/home/botworker/bbot/amdgpu-offload-rhel-9-cmake-build-only/llvm-project/clang/lib/Basic/ProfileList.cpp: In function ‘llvm::StringRef getSectionName(llvm::driver::ProfileInstrKind)’:
/home/botworker/bbot/amdgpu-offload-rhel-9-cmake-build-only/llvm-project/clang/lib/Basic/ProfileList.cpp:83:3: warning: case value ‘4’ not in enumerated type ‘llvm::driver::ProfileInstrKind’ [-Wswitch]
   83 |   case CodeGenOptions::ProfileIRSampleColdCov:
      |   ^~~~
[5097/7836] Building AMDGPUGenAsmWriter.inc...
[5098/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/TargetInfo.cpp.o
[5099/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/Targets/AMDGPU.cpp.o
[5100/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/Module.cpp.o
[5101/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/Targets/ARM.cpp.o
[5102/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/Targets/AArch64.cpp.o
[5103/7836] Building AMDGPUGenGlobalISel.inc...
[5104/7836] Building AMDGPUGenDAGISel.inc...
[5105/7836] Building AMDGPUGenAsmMatcher.inc...
[5106/7836] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/AsmPrinter.cpp.o
[5107/7836] Building CXX object tools/clang/lib/Frontend/Rewrite/CMakeFiles/obj.clangRewriteFrontend.dir/RewriteModernObjC.cpp.o
[5108/7836] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/Attributes.cpp.o
[5109/7836] Building AMDGPUGenRegisterBank.inc...
[5110/7836] Building AMDGPUGenInstrInfo.inc...
[5111/7836] Building AMDGPUGenRegisterInfo.inc...

```

</details>

https://github.com/llvm/llvm-project/pull/136098