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

Mon Dec 15 11:47:28 PST 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-nvptx-nvidia-ubuntu` running on `as-builder-7` while building `libc,llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/180/builds/29936

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
0.842 [2728/128/6] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/RustDemangle.cpp.o
0.843 [2727/128/7] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/DLangDemangle.cpp.o
0.845 [2726/128/8] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ABIBreak.cpp.o
0.846 [2725/128/9] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AutoConvert.cpp.o
0.901 [2724/128/10] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/COM.cpp.o
0.921 [2723/128/11] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ExtensibleRTTI.cpp.o
0.989 [2722/128/12] Linking CXX shared library lib/libLLVMDemangle.so.22.0git
1.026 [2721/128/13] Creating library symlink lib/libLLVMDemangle.so
1.096 [2720/128/14] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/MemAlloc.cpp.o
1.681 [2719/128/15] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o
FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes CCACHE_SLOPPINESS=pch_defines,time_macros /usr/bin/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/buildbot/worker/as-builder-7/llvm-nvptx-nvidia-ubuntu/build/lib/Support -I/home/buildbot/worker/as-builder-7/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/lib/Support -I/home/buildbot/worker/as-builder-7/llvm-nvptx-nvidia-ubuntu/build/include -I/home/buildbot/worker/as-builder-7/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include -I/home/buildbot/worker/as-builder-7/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/../third-party/siphash/include -I/home/buildbot/worker/as-builder-7/llvm-nvptx-nvidia-ubuntu/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-dangling-reference -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 -std=c++17 -fPIC -UNDEBUG -Wno-c99-extensions  -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/buildbot/worker/as-builder-7/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/lib/Support/APFloat.cpp
/home/buildbot/worker/as-builder-7/llvm-nvptx-nvidia-ubuntu/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.
1.787 [2719/127/16] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BuryPointer.cpp.o
1.998 [2719/126/17] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/MathExtras.cpp.o
2.207 [2719/125/18] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DivisionByConstantInfo.cpp.o
2.217 [2719/124/19] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o
2.377 [2719/123/20] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DXILABI.cpp.o
2.601 [2719/122/21] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Signposts.cpp.o
2.626 [2719/121/22] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CrashRecoveryContext.cpp.o
2.676 [2719/120/23] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AArch64BuildAttributes.cpp.o
2.712 [2719/119/24] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertUTF.cpp.o
2.884 [2719/118/25] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Locale.cpp.o
2.909 [2719/117/26] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/MSP430Attributes.cpp.o
2.934 [2719/116/27] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ModRef.cpp.o
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2.956 [2719/114/29] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/SuffixTreeNode.cpp.o
2.957 [2719/113/30] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertEBCDIC.cpp.o
2.960 [2719/112/31] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/SystemUtils.cpp.o
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2.975 [2719/110/33] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/LEB128.cpp.o
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2.986 [2719/108/35] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/HexagonAttributes.cpp.o
3.001 [2719/107/36] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/InstructionCost.cpp.o
3.007 [2719/106/37] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AllocToken.cpp.o
3.008 [2719/105/38] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/RISCVAttributes.cpp.o
3.009 [2719/104/39] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/circular_raw_ostream.cpp.o
3.010 [2719/103/40] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CRC.cpp.o
3.023 [2719/102/41] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CSKYAttributes.cpp.o
3.042 [2719/101/42] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ARMWinEH.cpp.o
3.049 [2719/100/43] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Allocator.cpp.o
3.061 [2719/99/44] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Hash.cpp.o
3.073 [2719/98/45] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DJB.cpp.o
3.074 [2719/97/46] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ARMBuildAttributes.cpp.o
3.092 [2719/96/47] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DynamicAPInt.cpp.o
3.120 [2719/95/48] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/KnownFPClass.cpp.o

```

</details>

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