[flang-commits] [flang] [flang] IEEE underflow control for Arm (PR #124170)

Mon Jan 27 06:24:39 PST 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `flang-aarch64-libcxx` running on `linaro-flang-aarch64-libcxx` while building `flang` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/89/builds/15262

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
115.462 [123/5/7217] Generating ../../../../include/flang/ieee_exceptions.mod
115.473 [123/4/7218] Generating ../../../../include/flang/cudadevice.mod
115.489 [123/3/7219] Generating ../../../../include/flang/ieee_arithmetic.mod
115.563 [123/2/7220] Generating ../../../../include/flang/iso_fortran_env.mod
116.024 [6/118/7221] Building C object tools/flang/runtime/CMakeFiles/FortranRuntime.dir/complex-reduction.c.o
116.025 [6/117/7222] Building CXX object tools/flang/runtime/CMakeFiles/FortranRuntime.dir/iostat.cpp.o
116.026 [6/116/7223] Building CXX object tools/flang/runtime/CMakeFiles/FortranRuntime.dir/terminator.cpp.o
116.028 [6/115/7224] Building C object tools/flang/runtime/CMakeFiles/FortranRuntime.dir/Float128Math/complex-math.c.o
116.145 [6/114/7225] Building CXX object tools/flang/runtime/CMakeFiles/FortranRuntime.dir/buffer.cpp.o
116.194 [6/113/7226] Building CXX object tools/flang/runtime/CMakeFiles/FortranRuntime.dir/exceptions.cpp.o
FAILED: tools/flang/runtime/CMakeFiles/FortranRuntime.dir/exceptions.cpp.o 
/usr/local/bin/c++ -DFLANG_INCLUDE_TESTS=1 -DFLANG_LITTLE_ENDIAN=1 -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/tcwg-buildbot/worker/flang-aarch64-libcxx/build/tools/flang/runtime -I/home/tcwg-buildbot/worker/flang-aarch64-libcxx/llvm-project/flang/runtime -I/home/tcwg-buildbot/worker/flang-aarch64-libcxx/llvm-project/flang/include -I/home/tcwg-buildbot/worker/flang-aarch64-libcxx/build/tools/flang/include -I/home/tcwg-buildbot/worker/flang-aarch64-libcxx/build/include -I/home/tcwg-buildbot/worker/flang-aarch64-libcxx/llvm-project/llvm/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-libcxx/llvm-project/llvm/../mlir/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-libcxx/build/tools/mlir/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-libcxx/build/tools/clang/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-libcxx/llvm-project/llvm/../clang/include -stdlib=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 -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Werror -Wno-deprecated-copy -Wno-string-conversion -Wno-ctad-maybe-unsupported -Wno-unused-command-line-argument -Wstring-conversion           -Wcovered-switch-default -Wno-nested-anon-types -fno-lto -O3 -DNDEBUG -std=c++17 -fPIC   -U_GLIBCXX_ASSERTIONS -U_LIBCPP_ENABLE_ASSERTIONS -UNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -MD -MT tools/flang/runtime/CMakeFiles/FortranRuntime.dir/exceptions.cpp.o -MF tools/flang/runtime/CMakeFiles/FortranRuntime.dir/exceptions.cpp.o.d -o tools/flang/runtime/CMakeFiles/FortranRuntime.dir/exceptions.cpp.o -c /home/tcwg-buildbot/worker/flang-aarch64-libcxx/llvm-project/flang/runtime/exceptions.cpp
../llvm-project/flang/runtime/exceptions.cpp:111:14: error: value size does not match register size specified by the constraint and modifier [-Werror,-Wasm-operand-widths]
  111 |   _FPU_GETCW(fpcr);
      |              ^
../llvm-project/flang/runtime/exceptions.cpp:111:3: note: use constraint modifier "w"
  111 |   _FPU_GETCW(fpcr);
      |   ^
/usr/include/aarch64-linux-gnu/fpu_control.h:33:30: note: expanded from macro '_FPU_GETCW'
   33 |   __asm__ __volatile__ ("mrs    %0, fpcr" : "=r" (fpcr))
      |                                 ^
../llvm-project/flang/runtime/exceptions.cpp:122:14: error: value size does not match register size specified by the constraint and modifier [-Werror,-Wasm-operand-widths]
  122 |   _FPU_GETCW(fpcr);
      |              ^
../llvm-project/flang/runtime/exceptions.cpp:122:3: note: use constraint modifier "w"
  122 |   _FPU_GETCW(fpcr);
      |   ^
/usr/include/aarch64-linux-gnu/fpu_control.h:33:30: note: expanded from macro '_FPU_GETCW'
   33 |   __asm__ __volatile__ ("mrs    %0, fpcr" : "=r" (fpcr))
      |                                 ^
../llvm-project/flang/runtime/exceptions.cpp:128:14: error: value size does not match register size specified by the constraint and modifier [-Werror,-Wasm-operand-widths]
  128 |   _FPU_SETCW(fpcr);
      |              ^
../llvm-project/flang/runtime/exceptions.cpp:128:3: note: use constraint modifier "w"
  128 |   _FPU_SETCW(fpcr);
      |   ^
/usr/include/aarch64-linux-gnu/fpu_control.h:36:36: note: expanded from macro '_FPU_SETCW'
   36 |   __asm__ __volatile__ ("msr    fpcr, %0" : : "r" (fpcr))
      |                                       ^
3 errors generated.
116.246 [6/112/7227] Building CXX object tools/flang/runtime/CMakeFiles/FortranRuntime.dir/main.cpp.o
116.265 [6/111/7228] Building CXX object tools/flang/runtime/CMakeFiles/FortranRuntime.dir/character.cpp.o
116.268 [6/110/7229] Building CXX object tools/flang/runtime/CMakeFiles/FortranRuntime.dir/extrema.cpp.o
116.297 [6/109/7230] Building CXX object tools/flang/runtime/CMakeFiles/FortranRuntime.dir/allocatable.cpp.o
116.360 [6/108/7231] Building CXX object tools/flang/runtime/CMakeFiles/FortranRuntime.dir/format.cpp.o
116.362 [6/107/7232] Building CXX object tools/flang/runtime/CMakeFiles/FortranRuntime.dir/edit-input.cpp.o
116.373 [6/106/7233] Building CXX object tools/flang/runtime/CMakeFiles/FortranRuntime.dir/descriptor.cpp.o
116.401 [6/105/7234] Building CXX object tools/flang/runtime/CMakeFiles/FortranRuntime.dir/edit-output.cpp.o
116.426 [6/104/7235] Building CXX object tools/flang/runtime/CMakeFiles/FortranRuntime.dir/file.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/124170