[libcxx-commits] [libcxx] [libc++] <experimental/simd> Add unary operators for class simd (PR #104764)

[via libcxx-commits]

joy2myself wrote:

> @joy2myself ,
> 
> The `simd_unary.pass` test gets failed for Armv7/Ubuntu target because of Clang crash.
> 
> ```
> # .---command stderr------------
> # | Assertion failed: N->getValueType(0) == MVT::v1i1 && "Expected v1i1 type", file C:\buildbot\as-builder-1\x-armv7l\llvm-project\llvm\lib\CodeGen\SelectionDAG\LegalizeVectorTypes.cpp, line 947
> # | PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
> # | Stack dump:
> # | 0.	Program arguments: C:\\buildbot\\as-builder-1\\x-armv7l\\build\\bin\\clang++.exe -cc1 -triple armv7-unknown-linux-gnueabihf -emit-obj -dumpdir C:\\buildbot\\as-builder-1\\x-armv7l\\build\\runtimes\\runtimes-armv7-unknown-linux-gnueabihf-bins\\libcxx\\test\\std\\experimental\\simd\\simd.class\\Output\\simd_unary.pass.cpp.dir\\t.tmp.exe- -disable-free -clear-ast-before-backend -main-file-name simd_unary.pass.cpp -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -target-cpu generic -target-feature +vfp2 -target-feature +vfp2sp -target-feature +vfp3 -target-feature +vfp3d16 -target-feature +vfp3d16sp -target-feature +vfp3sp -target-feature -fp16 -target-feature -vfp4 -target-feature -vfp4d16 -target-feature -vfp4d16sp -target-feature -vfp4sp -target-feature -fp-armv8 -target-feature -fp-armv8d16 -target-feature -fp-armv8d16sp -target-feature -fp-armv8sp -target-feature -fullfp16 -target-feature +fp64 -target-feature +d32 -target-feature +neon -target-feature -sha2 -target-feature -aes -target-feature -fp16fml -target-abi aapcs-linux -mfloat-abi hard -debugger-tuning=gdb -fdebug-compilation-dir=C:\\buildbot\\as-builder-1\\x-armv7l\\build\\runtimes\\runtimes-armv7-unknown-linux-gnueabihf-bins\\libcxx\\test\\std\\experimental\\simd\\simd.class -fcoverage-compilation-dir=C:\\buildbot\\as-builder-1\\x-armv7l\\build\\runtimes\\runtimes-armv7-unknown-linux-gnueabihf-bins\\libcxx\\test\\std\\experimental\\simd\\simd.class -nostdinc++ -resource-dir C:\\buildbot\\as-builder-1\\x-armv7l\\build\\lib\\clang\\20 -I C:/buildbot/as-builder-1/x-armv7l/build/runtimes/runtimes-armv7-unknown-linux-gnueabihf-bins/libcxx/test-suite-install/include/c++/v1 -I C:/buildbot/as-builder-1/x-armv7l/build/runtimes/runtimes-armv7-unknown-linux-gnueabihf-bins/libcxx/test-suite-install/include/armv7-unknown-linux-gnueabihf/c++/v1 -I C:/buildbot/as-builder-1/x-armv7l/llvm-project/libcxx/test/support -D _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D _LIBCPP_ENABLE_EXPERIMENTAL -D _LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_NONE -isysroot c:/buildbot/fs/jetson-tk1-arm-ubuntu -internal-isystem C:\\buildbot\\as-builder-1\\x-armv7l\\build\\lib\\clang\\20\\include -internal-isystem c:/buildbot/fs/jetson-tk1-arm-ubuntu/usr/local/include -internal-isystem c:/buildbot/fs/jetson-tk1-arm-ubuntu/usr/lib/gcc/arm-linux-gnueabihf/7/../../../../arm-linux-gnueabihf/include -internal-externc-isystem c:/buildbot/fs/jetson-tk1-arm-ubuntu/usr/include/arm-linux-gnueabihf -internal-externc-isystem c:/buildbot/fs/jetson-tk1-arm-ubuntu/include -internal-externc-isystem c:/buildbot/fs/jetson-tk1-arm-ubuntu/usr/include -Werror -Wall -Wctad-maybe-unsupported -Wextra -Wshadow -Wundef -Wunused-template -Wno-unused-command-line-argument -Wno-attributes -Wno-pessimizing-move -Wno-noexcept-type -Wno-atomic-alignment -Wno-reserved-module-identifier -Wdeprecated-copy -Wdeprecated-copy-dtor -Wno-user-defined-literals -Wno-tautological-compare -Wsign-compare -Wunused-variable -Wunused-parameter -Wunreachable-code -Wno-unused-local-typedef -Wno-local-type-template-args -Wno-c++11-extensions -Wno-unknown-pragmas -Wno-pass-failed -Wno-mismatched-new-delete -Wno-redundant-move -Wno-self-move -Werror=thread-safety -Wuser-defined-warnings -std=c++26 -fdeprecated-macro -ferror-limit 19 -pthread -fno-signed-char -fgnuc-version=4.2.1 -fno-implicit-modules -fskip-odr-check-in-gmf -fcxx-exceptions -fexceptions -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o C:\\buildbot\\as-builder-1\\x-armv7l\\build\\lit-tmp-9a6ljw1o\\simd_unary-64154a.o -x c++ C:\\buildbot\\as-builder-1\\x-armv7l\\llvm-project\\libcxx\\test\\std\\experimental\\simd\\simd.class\\simd_unary.pass.cpp
> # | 1.	<eof> parser at end of file
> # | 2.	Code generation
> # | 3.	Running pass 'Function Pass Manager' on module 'C:\buildbot\as-builder-1\x-armv7l\llvm-project\libcxx\test\std\experimental\simd\simd.class\simd_unary.pass.cpp'.
> # | 4.	Running pass 'ARM Instruction Selection' on function '@_ZNSt12experimental14parallelism_v217__simd_operationsIdNS0_8simd_abi9__vec_extILi1EEEE8__negateB8ne200000ENS0_14__simd_storageIdS4_EE'
> # | Exception Code: 0x80000003
> # |  #0 0x00007ff66a407965 (C:\buildbot\as-builder-1\x-armv7l\build\bin\clang++.exe+0xf37965)
> ...
> ```
> 
> https://lab.llvm.org/buildbot/#/builders/38/builds/460

@vvereschaka Thank you for bringing this to my attention. I am currently investigating the issue. Are there any guidelines or resources that could assist me in setting up and reproducing the problem on my end? Any additional insights would be appreciated.

https://github.com/llvm/llvm-project/pull/104764