[llvm] [profcheck] Add unknown branch weights to expanded cmpxchg loop. (PR #165841)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `amdgpu-offload-ubuntu-22-cmake-build-only` running on `rocm-docker-ubu-22` while building `llvm` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/203/builds/28242

<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)
...
[3249/8174] Building FunctionInterfaces.h.inc...
[3250/8174] Building FunctionInterfaces.cpp.inc...
[3251/8174] Building BuiltinAttributeInterfaces.cpp.inc...
[3252/8174] Building BuiltinAttributeInterfaces.h.inc...
[3253/8174] Building IndexingMapOpInterface.cpp.inc...
[3254/8174] Building IndexingMapOpInterface.h.inc...
[3255/8174] Building InferIntRangeInterface.h.inc...
[3256/8174] Building InferIntRangeInterface.cpp.inc...
[3257/8174] Building InferTypeOpInterface.cpp.inc...
[3258/8174] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AtomicExpandPass.cpp.o
FAILED: lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AtomicExpandPass.cpp.o 
ccache /usr/bin/c++ -DGTEST_HAS_RTTI=0 -DLLVM_EXPORTS -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/build/lib/CodeGen -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/CodeGen -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/build/include -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-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-redundant-move -Wno-pessimizing-move -Wno-array-bounds -Wno-stringop-overread -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 -fPIC  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -MD -MT lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AtomicExpandPass.cpp.o -MF lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AtomicExpandPass.cpp.o.d -o lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AtomicExpandPass.cpp.o -c /home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/CodeGen/AtomicExpandPass.cpp
In file included from /home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/include/llvm/CodeGen/TargetLowering.h:32,
                 from /home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/CodeGen/AtomicExpandPass.cpp:24:
/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/include/llvm/CodeGen/LibcallLoweringInfo.h:15:46: warning: ‘visibility’ attribute ignored [-Wattributes]
   15 |   LLVM_ABI const RTLIB::RuntimeLibcallsInfo &RTLCI;
      |                                              ^~~~~
/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/include/llvm/CodeGen/LibcallLoweringInfo.h:18:25: warning: ‘visibility’ attribute ignored [-Wattributes]
   18 |       RTLIB::Unsupported};
      |                         ^
/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/CodeGen/AtomicExpandPass.cpp: In static member function ‘static llvm::Value* {anonymous}::AtomicExpandImpl::insertRMWCmpXchgLoop(llvm::IRBuilderBase&, llvm::Type*, llvm::Value*, llvm::Align, llvm::AtomicOrdering, llvm::SyncScope::ID, llvm::function_ref<llvm::Value*(llvm::IRBuilderBase&, llvm::Value*)>, llvm::CreateCmpXchgInstFun, llvm::Instruction*)’:
/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/CodeGen/AtomicExpandPass.cpp:1694:56: error: could not convert ‘* F’ from ‘llvm::Function’ to ‘llvm::StringRef’
 1694 |   setExplicitlyUnknownBranchWeightsIfProfiled(*CondBr, *F, DEBUG_TYPE);
      |                                                        ^~
      |                                                        |
      |                                                        llvm::Function
[3259/8174] Building LoopLikeInterface.cpp.inc...
[3260/8174] Building BuiltinDialect.cpp.inc...
[3261/8174] Building BuiltinDialect.h.inc...
[3262/8174] Building InferTypeOpInterface.h.inc...
[3263/8174] Building LoopLikeInterface.h.inc...
[3264/8174] Linking CXX shared library lib/libLLVMCore.so.22.0git
[3265/8174] Building MemOpInterfaces.cpp.inc...
[3266/8174] Building ParallelCombiningOpInterface.cpp.inc...
[3267/8174] Linking CXX shared library lib/libLLVMSPIRVInfo.so.22.0git
[3268/8174] Linking CXX shared library lib/libLLVMMCDisassembler.so.22.0git
[3269/8174] Linking CXX shared library lib/libLLVMDWARFCFIChecker.so.22.0git
[3270/8174] Building X86GenInstrInfo.inc...
[3271/8174] Linking CXX shared library lib/libLLVMMCA.so.22.0git
[3272/8174] Building CXX object lib/Object/CMakeFiles/LLVMObject.dir/IRSymtab.cpp.o
[3273/8174] Building CXX object lib/MC/MCParser/CMakeFiles/LLVMMCParser.dir/AsmParser.cpp.o
[3274/8174] Building AMDGPUGenRegBankGICombiner.inc...
[3275/8174] Building AMDGPUGenMCPseudoLowering.inc...
[3276/8174] Building AMDGPUGenPreLegalizeGICombiner.inc...
[3277/8174] Building AMDGPUGenPostLegalizeGICombiner.inc...
[3278/8174] Building AMDGPUGenDisassemblerTables.inc...
[3279/8174] Building AMDGPUGenSubtargetInfo.inc...
[3280/8174] Building AMDGPUGenMCCodeEmitter.inc...
[3281/8174] Building AMDGPUGenSearchableTables.inc...
Step 7 (build cmake config) failure: build cmake config (failure)
...
[3249/8174] Building FunctionInterfaces.h.inc...
[3250/8174] Building FunctionInterfaces.cpp.inc...
[3251/8174] Building BuiltinAttributeInterfaces.cpp.inc...
[3252/8174] Building BuiltinAttributeInterfaces.h.inc...
[3253/8174] Building IndexingMapOpInterface.cpp.inc...
[3254/8174] Building IndexingMapOpInterface.h.inc...
[3255/8174] Building InferIntRangeInterface.h.inc...
[3256/8174] Building InferIntRangeInterface.cpp.inc...
[3257/8174] Building InferTypeOpInterface.cpp.inc...
[3258/8174] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AtomicExpandPass.cpp.o
FAILED: lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AtomicExpandPass.cpp.o 
ccache /usr/bin/c++ -DGTEST_HAS_RTTI=0 -DLLVM_EXPORTS -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/build/lib/CodeGen -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/CodeGen -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/build/include -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-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-redundant-move -Wno-pessimizing-move -Wno-array-bounds -Wno-stringop-overread -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 -fPIC  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -MD -MT lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AtomicExpandPass.cpp.o -MF lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AtomicExpandPass.cpp.o.d -o lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AtomicExpandPass.cpp.o -c /home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/CodeGen/AtomicExpandPass.cpp
In file included from /home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/include/llvm/CodeGen/TargetLowering.h:32,
                 from /home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/CodeGen/AtomicExpandPass.cpp:24:
/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/include/llvm/CodeGen/LibcallLoweringInfo.h:15:46: warning: ‘visibility’ attribute ignored [-Wattributes]
   15 |   LLVM_ABI const RTLIB::RuntimeLibcallsInfo &RTLCI;
      |                                              ^~~~~
/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/include/llvm/CodeGen/LibcallLoweringInfo.h:18:25: warning: ‘visibility’ attribute ignored [-Wattributes]
   18 |       RTLIB::Unsupported};
      |                         ^
/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/CodeGen/AtomicExpandPass.cpp: In static member function ‘static llvm::Value* {anonymous}::AtomicExpandImpl::insertRMWCmpXchgLoop(llvm::IRBuilderBase&, llvm::Type*, llvm::Value*, llvm::Align, llvm::AtomicOrdering, llvm::SyncScope::ID, llvm::function_ref<llvm::Value*(llvm::IRBuilderBase&, llvm::Value*)>, llvm::CreateCmpXchgInstFun, llvm::Instruction*)’:
/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/CodeGen/AtomicExpandPass.cpp:1694:56: error: could not convert ‘* F’ from ‘llvm::Function’ to ‘llvm::StringRef’
 1694 |   setExplicitlyUnknownBranchWeightsIfProfiled(*CondBr, *F, DEBUG_TYPE);
      |                                                        ^~
      |                                                        |
      |                                                        llvm::Function
[3259/8174] Building LoopLikeInterface.cpp.inc...
[3260/8174] Building BuiltinDialect.cpp.inc...
[3261/8174] Building BuiltinDialect.h.inc...
[3262/8174] Building InferTypeOpInterface.h.inc...
[3263/8174] Building LoopLikeInterface.h.inc...
[3264/8174] Linking CXX shared library lib/libLLVMCore.so.22.0git
[3265/8174] Building MemOpInterfaces.cpp.inc...
[3266/8174] Building ParallelCombiningOpInterface.cpp.inc...
[3267/8174] Linking CXX shared library lib/libLLVMSPIRVInfo.so.22.0git
[3268/8174] Linking CXX shared library lib/libLLVMMCDisassembler.so.22.0git
[3269/8174] Linking CXX shared library lib/libLLVMDWARFCFIChecker.so.22.0git
[3270/8174] Building X86GenInstrInfo.inc...
[3271/8174] Linking CXX shared library lib/libLLVMMCA.so.22.0git
[3272/8174] Building CXX object lib/Object/CMakeFiles/LLVMObject.dir/IRSymtab.cpp.o
[3273/8174] Building CXX object lib/MC/MCParser/CMakeFiles/LLVMMCParser.dir/AsmParser.cpp.o
[3274/8174] Building AMDGPUGenRegBankGICombiner.inc...
[3275/8174] Building AMDGPUGenMCPseudoLowering.inc...
[3276/8174] Building AMDGPUGenPreLegalizeGICombiner.inc...
[3277/8174] Building AMDGPUGenPostLegalizeGICombiner.inc...
[3278/8174] Building AMDGPUGenDisassemblerTables.inc...
[3279/8174] Building AMDGPUGenSubtargetInfo.inc...
[3280/8174] Building AMDGPUGenMCCodeEmitter.inc...
[3281/8174] Building AMDGPUGenSearchableTables.inc...

```

</details>

https://github.com/llvm/llvm-project/pull/165841