[libc-commits] [libc] [llvm] [APFloat] Add exp function for APFloat::IEEESsingle using expf implementation from LLVM libc. (PR #143959)

Mon Dec 15 08:25:33 PST 2025

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 `libc,llvm` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/203/builds/31866

<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)
...
[2/8241] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/MicrosoftDemangle.cpp.o
[3/8241] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/Demangle.cpp.o
[4/8241] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/RustDemangle.cpp.o
[5/8241] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/MicrosoftDemangleNodes.cpp.o
[6/8241] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/DLangDemangle.cpp.o
[7/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ABIBreak.cpp.o
[8/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/COM.cpp.o
[9/8241] Linking CXX shared library lib/libLLVMDemangle.so.22.0git
[10/8241] Creating library symlink lib/libLLVMDemangle.so
[11/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o
FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.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/Support -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/Support -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 -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/../third-party/siphash/include -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/build/include/../../libc -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 -UNDEBUG -Wno-c99-extensions -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o -MF lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o.d -o lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o -c /home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/Support/APFloat.cpp
/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/Support/APFloat.cpp:32:10: fatal error: shared/math.h: No such file or directory
   32 | #include "shared/math.h"
      |          ^~~~~~~~~~~~~~~
compilation terminated.
[12/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DivisionByConstantInfo.cpp.o
[13/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o
[14/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertUTF.cpp.o
[15/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DXILABI.cpp.o
[16/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/circular_raw_ostream.cpp.o
[17/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DJB.cpp.o
[18/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ARMBuildAttributes.cpp.o
[19/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DynamicAPInt.cpp.o
[20/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ELFAttributes.cpp.o
[21/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CRC.cpp.o
[22/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APSInt.cpp.o
[23/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertEBCDIC.cpp.o
[24/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DeltaAlgorithm.cpp.o
[25/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Chrono.cpp.o
[26/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AArch64AttributeParser.cpp.o
[27/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Compression.cpp.o
[28/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ExponentialBackoff.cpp.o
[29/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ErrorHandling.cpp.o
[30/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertUTFWrapper.cpp.o
[31/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DataExtractor.cpp.o
[32/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Debug.cpp.o
[33/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Error.cpp.o
[34/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APFixedPoint.cpp.o
[35/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DebugCounter.cpp.o
[36/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DAGDeltaAlgorithm.cpp.o
[37/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CachePruning.cpp.o
[38/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o
[39/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CodeGenCoverage.cpp.o
[40/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AMDGPUMetadata.cpp.o
[41/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ELFAttrParserExtended.cpp.o
[42/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ELFAttrParserCompact.cpp.o
[43/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APInt.cpp.o
[44/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CommandLine.cpp.o
Step 7 (build cmake config) failure: build cmake config (failure)
...
[2/8241] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/MicrosoftDemangle.cpp.o
[3/8241] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/Demangle.cpp.o
[4/8241] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/RustDemangle.cpp.o
[5/8241] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/MicrosoftDemangleNodes.cpp.o
[6/8241] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/DLangDemangle.cpp.o
[7/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ABIBreak.cpp.o
[8/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/COM.cpp.o
[9/8241] Linking CXX shared library lib/libLLVMDemangle.so.22.0git
[10/8241] Creating library symlink lib/libLLVMDemangle.so
[11/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o
FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.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/Support -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/Support -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 -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/../third-party/siphash/include -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/build/include/../../libc -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 -UNDEBUG -Wno-c99-extensions -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o -MF lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o.d -o lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o -c /home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/Support/APFloat.cpp
/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/Support/APFloat.cpp:32:10: fatal error: shared/math.h: No such file or directory
   32 | #include "shared/math.h"
      |          ^~~~~~~~~~~~~~~
compilation terminated.
[12/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DivisionByConstantInfo.cpp.o
[13/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o
[14/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertUTF.cpp.o
[15/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DXILABI.cpp.o
[16/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/circular_raw_ostream.cpp.o
[17/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DJB.cpp.o
[18/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ARMBuildAttributes.cpp.o
[19/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DynamicAPInt.cpp.o
[20/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ELFAttributes.cpp.o
[21/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CRC.cpp.o
[22/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APSInt.cpp.o
[23/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertEBCDIC.cpp.o
[24/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DeltaAlgorithm.cpp.o
[25/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Chrono.cpp.o
[26/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AArch64AttributeParser.cpp.o
[27/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Compression.cpp.o
[28/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ExponentialBackoff.cpp.o
[29/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ErrorHandling.cpp.o
[30/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertUTFWrapper.cpp.o
[31/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DataExtractor.cpp.o
[32/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Debug.cpp.o
[33/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Error.cpp.o
[34/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APFixedPoint.cpp.o
[35/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DebugCounter.cpp.o
[36/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DAGDeltaAlgorithm.cpp.o
[37/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CachePruning.cpp.o
[38/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o
[39/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CodeGenCoverage.cpp.o
[40/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AMDGPUMetadata.cpp.o
[41/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ELFAttrParserExtended.cpp.o
[42/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ELFAttrParserCompact.cpp.o
[43/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APInt.cpp.o
[44/8241] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CommandLine.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/143959