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

Mon Dec 15 07:40:34 PST 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-hip-vega20` running on `hip-vega20-0` while building `libc,llvm` at step 3 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/123/builds/32241

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

```
Step 3 (annotate) failure: '../llvm-zorg/zorg/buildbot/builders/annotated/hip-build.sh --jobs=' (failure)
...
[6/5326] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/MicrosoftDemangleNodes.cpp.o
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[8/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AutoConvert.cpp.o
[9/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/COM.cpp.o
[10/5326] Linking CXX static library lib/libLLVMDemangle.a
[11/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ExtensibleRTTI.cpp.o
[12/5326] Building ASM object lib/Support/BLAKE3/CMakeFiles/LLVMSupportBlake3.dir/blake3_sse2_x86-64_unix.S.o
[13/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BuryPointer.cpp.o
[14/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DivisionByConstantInfo.cpp.o
[15/5326] 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 -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/clang-hip-vega20/botworker/clang-hip-vega20/llvm/lib/Support -I/home/botworker/bbot/clang-hip-vega20/llvm-project/llvm/lib/Support -I/home/botworker/bbot/clang-hip-vega20/botworker/clang-hip-vega20/llvm/include -I/home/botworker/bbot/clang-hip-vega20/llvm-project/llvm/include -I/home/botworker/bbot/clang-hip-vega20/llvm-project/llvm/../third-party/siphash/include -I/home/botworker/bbot/clang-hip-vega20/botworker/clang-hip-vega20/llvm/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 -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/clang-hip-vega20/llvm-project/llvm/lib/Support/APFloat.cpp
/home/botworker/bbot/clang-hip-vega20/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.
[16/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o
[17/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertUTF.cpp.o
[18/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DXILABI.cpp.o
[19/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CrashRecoveryContext.cpp.o
[20/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AArch64BuildAttributes.cpp.o
[21/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/circular_raw_ostream.cpp.o
[22/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertEBCDIC.cpp.o
[23/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ARMBuildAttributes.cpp.o
[24/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DJB.cpp.o
[25/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AllocToken.cpp.o
[26/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Allocator.cpp.o
[27/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CSKYAttributes.cpp.o
[28/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Hash.cpp.o
[29/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/HexagonAttributes.cpp.o
[30/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CRC.cpp.o
[31/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ARMWinEH.cpp.o
[32/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/IntEqClasses.cpp.o
[33/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ELFAttributes.cpp.o
[34/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DynamicAPInt.cpp.o
[35/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/FormattedStream.cpp.o
[36/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BlockFrequency.cpp.o
[37/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APSInt.cpp.o
[38/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/InstructionCost.cpp.o
[39/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AArch64AttributeParser.cpp.o
[40/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BranchProbability.cpp.o
[41/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BinaryStreamError.cpp.o
[42/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/FloatingPointMode.cpp.o
[43/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Chrono.cpp.o
[44/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertUTFWrapper.cpp.o
[45/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/InitLLVM.cpp.o
[46/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Base64.cpp.o
[47/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/FoldingSet.cpp.o
[48/5326] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Compression.cpp.o
Step 6 (Configure LLVM Build) failure: Configure LLVM Build (failure)
...
-- Failed to find LLVM FileCheck
-- Google Benchmark version: v0.0.0, normalized to 0.0.0
-- Looking for shm_open in rt
-- Looking for shm_open in rt - found
-- Performing Test HAVE_CXX_FLAG_WALL
-- Performing Test HAVE_CXX_FLAG_WALL - Success
-- Performing Test HAVE_CXX_FLAG_WEXTRA
-- Performing Test HAVE_CXX_FLAG_WEXTRA - Success
-- Performing Test HAVE_CXX_FLAG_WSHADOW
-- Performing Test HAVE_CXX_FLAG_WSHADOW - Success
-- Performing Test HAVE_CXX_FLAG_WFLOAT_EQUAL
-- Performing Test HAVE_CXX_FLAG_WFLOAT_EQUAL - Success
-- Performing Test HAVE_CXX_FLAG_WOLD_STYLE_CAST
-- Performing Test HAVE_CXX_FLAG_WOLD_STYLE_CAST - Success
-- Performing Test HAVE_CXX_FLAG_WSUGGEST_OVERRIDE
-- Performing Test HAVE_CXX_FLAG_WSUGGEST_OVERRIDE - Success
-- Performing Test HAVE_CXX_FLAG_PEDANTIC
-- Performing Test HAVE_CXX_FLAG_PEDANTIC - Success
-- Performing Test HAVE_CXX_FLAG_PEDANTIC_ERRORS
-- Performing Test HAVE_CXX_FLAG_PEDANTIC_ERRORS - Success
-- Performing Test HAVE_CXX_FLAG_WSHORTEN_64_TO_32
-- Performing Test HAVE_CXX_FLAG_WSHORTEN_64_TO_32 - Failed
-- Performing Test HAVE_CXX_FLAG_FSTRICT_ALIASING
-- Performing Test HAVE_CXX_FLAG_FSTRICT_ALIASING - Success
-- Performing Test HAVE_CXX_FLAG_WNO_DEPRECATED_DECLARATIONS
-- Performing Test HAVE_CXX_FLAG_WNO_DEPRECATED_DECLARATIONS - Success
-- Performing Test HAVE_CXX_FLAG_FNO_EXCEPTIONS
-- Performing Test HAVE_CXX_FLAG_FNO_EXCEPTIONS - Success
-- Performing Test HAVE_CXX_FLAG_WSTRICT_ALIASING
-- Performing Test HAVE_CXX_FLAG_WSTRICT_ALIASING - Success
-- Performing Test HAVE_CXX_FLAG_WD654
-- Performing Test HAVE_CXX_FLAG_WD654 - Failed
-- Performing Test HAVE_CXX_FLAG_WTHREAD_SAFETY
-- Performing Test HAVE_CXX_FLAG_WTHREAD_SAFETY - Failed
-- Performing Test HAVE_CXX_FLAG_COVERAGE
-- Performing Test HAVE_CXX_FLAG_COVERAGE - Success
-- Compiling and running to test HAVE_GNU_POSIX_REGEX
-- Performing Test HAVE_GNU_POSIX_REGEX -- failed to compile
-- Compiling and running to test HAVE_POSIX_REGEX
-- Performing Test HAVE_POSIX_REGEX -- success
-- Compiling and running to test HAVE_STEADY_CLOCK
-- Performing Test HAVE_STEADY_CLOCK -- success
-- Compiling and running to test HAVE_PTHREAD_AFFINITY
-- Performing Test HAVE_PTHREAD_AFFINITY -- success
-- Configuring done
-- Generating done
-- Build files have been written to: /home/botworker/bbot/clang-hip-vega20/botworker/clang-hip-vega20/llvm
+ build_step 'Building LLVM'
+ echo '@@@BUILD_STEP Building LLVM@@@'
+ ninja

```

</details>

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