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

Mon Dec 15 07:25:18 PST 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `mlir-rocm-mi200` running on `mi200-buildbot` while building `libc,llvm` at step 6 "build-check-mlir-build-only".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/177/builds/25925

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

```
Step 6 (build-check-mlir-build-only) failure: build (failure)
...
1.745 [5180/58/42] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BranchProbability.cpp.o
1.764 [5179/58/43] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Compression.cpp.o
1.766 [5178/58/44] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AArch64AttributeParser.cpp.o
1.770 [5177/58/45] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/MemAlloc.cpp.o
1.784 [5176/58/46] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BinaryStreamError.cpp.o
1.812 [5175/58/47] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Base64.cpp.o
1.845 [5174/58/48] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/FloatingPointMode.cpp.o
1.864 [5173/58/49] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/FoldingSet.cpp.o
1.891 [5172/58/50] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertUTFWrapper.cpp.o
1.913 [5171/58/51] 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/clang++ -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/vol/worker/mi200-buildbot/mlir-rocm-mi200/build/lib/Support -I/vol/worker/mi200-buildbot/mlir-rocm-mi200/llvm-project/llvm/lib/Support -I/vol/worker/mi200-buildbot/mlir-rocm-mi200/build/include -I/vol/worker/mi200-buildbot/mlir-rocm-mi200/llvm-project/llvm/include -I/vol/worker/mi200-buildbot/mlir-rocm-mi200/llvm-project/llvm/../third-party/siphash/include -I/vol/worker/mi200-buildbot/mlir-rocm-mi200/build/include/../../libc -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Werror=global-constructors -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 /vol/worker/mi200-buildbot/mlir-rocm-mi200/llvm-project/llvm/lib/Support/APFloat.cpp
/vol/worker/mi200-buildbot/mlir-rocm-mi200/llvm-project/llvm/lib/Support/APFloat.cpp:32:10: fatal error: 'shared/math.h' file not found
   32 | #include "shared/math.h"
      |          ^~~~~~~~~~~~~~~
1 error generated.
2.041 [5171/57/52] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Hash.cpp.o
2.069 [5171/56/53] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CSKYAttributeParser.cpp.o
2.122 [5171/55/54] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ExponentialBackoff.cpp.o
2.125 [5171/54/55] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/FormatVariadic.cpp.o
2.224 [5171/53/56] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DataExtractor.cpp.o
2.225 [5171/52/57] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BinaryStreamWriter.cpp.o
2.230 [5171/51/58] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BinaryStreamRef.cpp.o
2.231 [5171/50/59] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/MathExtras.cpp.o
2.262 [5171/49/60] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ErrorHandling.cpp.o
2.377 [5171/48/61] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/HexagonAttributes.cpp.o
2.398 [5171/47/62] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BinaryStreamReader.cpp.o
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2.487 [5171/45/64] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/IntEqClasses.cpp.o
2.515 [5171/44/65] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/InstructionCost.cpp.o
2.569 [5171/43/66] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Error.cpp.o
2.590 [5171/42/67] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/IntervalMap.cpp.o
2.606 [5171/41/68] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APFixedPoint.cpp.o
2.652 [5171/40/69] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/LEB128.cpp.o
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2.657 [5171/38/71] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/HexagonAttributeParser.cpp.o
2.699 [5171/37/72] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Locale.cpp.o
2.762 [5171/36/73] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/FileOutputBuffer.cpp.o
2.765 [5171/35/74] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/GraphWriter.cpp.o
2.793 [5171/34/75] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DAGDeltaAlgorithm.cpp.o
2.800 [5171/33/76] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CachePruning.cpp.o
2.860 [5171/32/77] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/InitLLVM.cpp.o
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2.892 [5171/30/79] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/LineIterator.cpp.o
2.901 [5171/29/80] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CodeGenCoverage.cpp.o
2.916 [5171/28/81] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ManagedStatic.cpp.o
2.947 [5171/27/82] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/MSP430Attributes.cpp.o
2.948 [5171/26/83] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DebugCounter.cpp.o
3.028 [5171/25/84] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/FileCollector.cpp.o

```

</details>

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