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

[LLVM Continuous Integration via libc-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `mlir-nvidia-gcc7` running on `mlir-nvidia` while building `libc,llvm` at step 6 "build-check-mlir-build-only".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/116/builds/22271

<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)
0.380 [5073/16/1] 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/g++-7 -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/mlir-nvidia/mlir-nvidia-gcc7/llvm.obj/lib/Support -I/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/lib/Support -I/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.obj/include -I/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include -I/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/../third-party/siphash/include -I/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.obj/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-array-bounds -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -UNDEBUG -Wno-c99-extensions -std=c++1z  -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/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/lib/Support/APFloat.cpp
/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/lib/Support/APFloat.cpp:32:10: fatal error: shared/math.h: No such file or directory
 #include "shared/math.h"
          ^~~~~~~~~~~~~~~
compilation terminated.
0.559 [5073/15/2] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertUTF.cpp.o
0.818 [5073/14/3] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o
0.913 [5073/13/4] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CrashRecoveryContext.cpp.o
0.984 [5073/12/5] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CRC.cpp.o
1.030 [5073/11/6] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertEBCDIC.cpp.o
1.081 [5073/10/7] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CSKYAttributes.cpp.o
1.209 [5073/9/8] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APSInt.cpp.o
1.323 [5073/8/9] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertUTFWrapper.cpp.o
1.349 [5073/7/10] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Compression.cpp.o
1.642 [5073/6/11] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CSKYAttributeParser.cpp.o
1.652 [5073/5/12] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DeltaAlgorithm.cpp.o
1.749 [5073/4/13] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DataExtractor.cpp.o
1.800 [5073/3/14] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Debug.cpp.o
1.903 [5073/2/15] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DebugCounter.cpp.o
In file included from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/lib/Support/DebugCounter.cpp:1:0:
/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/Support/DebugCounter.h: In member function ‘void llvm::DebugCounter::activateAllCounters()’:
/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/Support/DebugCounter.h:168:27: warning: unused variable ‘_’ [-Wunused-variable]
     for (auto &[_, Counter] : Counters)
                           ^
At global scope:
cc1plus: warning: unrecognized command line option ‘-Wno-c99-extensions’
2.982 [5073/1/16] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APInt.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

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