[Bug c++/106322] i386: Wrong code at O2 level (O0 / O1 are working)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106322 --- Comment #7 from Mathieu Malaterre --- I can make it fails with sanitize=address: /usr/bin/g++-12 -DHWY_STATIC_DEFINE -I"/home/malat/highway-0.17.1~git20220711.f0a396a" -O2 -fsanitize=address -fPIE -fvisibility=hidden -fvisibility-inlines-hidden -Wno-builtin-macro-redefined -D__DATE__=\"redacted\" -D__TIMESTAMP__=\"redacted\" -D__TIME__=\"redacted\" -fmerge-all-constants -Wall -Wextra -Wconversion -Wsign-conversion -Wvla -Wnon-virtual-dtor -fmath-errno -fno-exceptions -DHWY_IS_TEST=1 -DGTEST_HAS_PTHREAD=1 -MD -MT CMakeFiles/mul_test.dir/hwy/tests/mul_test.cc.o -MF CMakeFiles/mul_test.dir/hwy/tests/mul_test.cc.o.d -o CMakeFiles/mul_test.dir/hwy/tests/mul_test.cc.o -c "/home/malat/highway-0.17.1~git20220711.f0a396a/hwy/tests/mul_test.cc" [...] Running main() from ./googletest/src/gtest_main.cc Note: Google Test filter = HwyMulTestGroup/HwyMulTest.TestAllMulHigh/Emu128 [==] Running 1 test from 1 test suite. [--] Global test environment set-up. [--] 1 test from HwyMulTestGroup/HwyMulTest [ RUN ] HwyMulTestGroup/HwyMulTest.TestAllMulHigh/Emu128 i16x2 expect [0+ ->]: 0x3FFF,0x0FFF, i16x2 actual [0+ ->]: 0xBFFF,0x0FFF, Abort at /home/malat/highway-0.17.1~git20220711.f0a396a/hwy/tests/mul_test.cc:131: Emu128, i16x2 lane 0 mismatch: expected '0x3FFF', got '0xBFFF'.
[Bug c++/106322] i386: Wrong code at O2 level (O0 / O1 are working)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106322 --- Comment #6 from Mathieu Malaterre --- Using `-fno-strict-aliasing` causes the same symptoms: /usr/bin/g++-12 -DHWY_STATIC_DEFINE -I"/home/malat/highway-0.17.1~git20220711.f0a396a" -O2 -fno-strict-aliasing -fPIE -fvisibility=hidden -fvisibility-inlines-hidden -Wno-builtin-macro-redefined -D__DATE__=\"redacted\" -D__TIMESTAMP__=\"redacted\" -D__TIME__=\"redacted\" -fmerge-all-constants -Wall -Wextra -Wconversion -Wsign-conversion -Wvla -Wnon-virtual-dtor -fmath-errno -fno-exceptions -DHWY_IS_TEST=1 -DGTEST_HAS_PTHREAD=1 -MD -MT CMakeFiles/mul_test.dir/hwy/tests/mul_test.cc.o -MF CMakeFiles/mul_test.dir/hwy/tests/mul_test.cc.o.d -o CMakeFiles/mul_test.dir/hwy/tests/mul_test.cc.o -c "/home/malat/highway-0.17.1~git20220711.f0a396a/hwy/tests/mul_test.cc" [...] Running main() from ./googletest/src/gtest_main.cc Note: Google Test filter = HwyMulTestGroup/HwyMulTest.TestAllMulHigh/Emu128 [==] Running 1 test from 1 test suite. [--] Global test environment set-up. [--] 1 test from HwyMulTestGroup/HwyMulTest [ RUN ] HwyMulTestGroup/HwyMulTest.TestAllMulHigh/Emu128 i16x8 expect [0+ ->]: 0x3FFF,0x0FFF,0x03FF,0x00FF,0x003F,0x000F,0x0003, i16x8 actual [0+ ->]: 0xBFFF,0x0FFF,0xE400,0x00FF,0xF840,0x000F,0xFE04, Abort at /home/malat/highway-0.17.1~git20220711.f0a396a/hwy/tests/mul_test.cc:131: Emu128, i16x8 lane 0 mismatch: expected '0x3FFF', got '0xBFFF'.
[Bug c++/106322] i386: Wrong code at O2 level (O0 / O1 are working)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106322 --- Comment #5 from Mathieu Malaterre --- Compilation line for -save-temps is: % /usr/bin/g++-12 -DHWY_STATIC_DEFINE -I"/home/malat/highway-0.17.1~git20220711.f0a396a" -O2 -fPIE -fvisibility=hidden -fvisibility-inlines-hidden -Wno-builtin-macro-redefined -D__DATE__=\"redacted\" -D__TIMESTAMP__=\"redacted\" -D__TIME__=\"redacted\" -fmerge-all-constants -Wall -Wextra -Wconversion -Wsign-conversion -Wvla -Wnon-virtual-dtor -fmath-errno -fno-exceptions -DHWY_IS_TEST=1 -DGTEST_HAS_PTHREAD=1 -MD -MT CMakeFiles/mul_test.dir/hwy/tests/mul_test.cc.o -MF CMakeFiles/mul_test.dir/hwy/tests/mul_test.cc.o.d -o CMakeFiles/mul_test.dir/hwy/tests/mul_test.cc.o -c "/home/malat/highway-0.17.1~git20220711.f0a396a/hwy/tests/mul_test.cc" -save-temps
[Bug c++/106322] i386: Wrong code at O2 level (O0 / O1 are working)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106322 --- Comment #4 from Mathieu Malaterre --- gcc-11 version on my side is: % gcc-11 --version gcc-11 (Debian 11.3.0-4) 11.3.0 Copyright (C) 2021 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. gcc-12 version is: % gcc-12 --version gcc-12 (Debian 12.1.0-5) 12.1.0 Copyright (C) 2022 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Everything was executed from public porterbox barriere.debian.org (Debian sid chroot).
[Bug c++/106322] i386: Wrong code at O2 level (O0 / O1 are working)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106322 --- Comment #3 from Mathieu Malaterre --- Created attachment 53306 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53306&action=edit gcc-12 -O2 -save-temps
[Bug c++/106322] i386: Wrong code at O2 level (O0 / O1 are working)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106322 Mathieu Malaterre changed: What|Removed |Added CC||malat at debian dot org --- Comment #2 from Mathieu Malaterre --- Created attachment 53305 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53305&action=edit gcc-11 -O2 -save-temps
[Bug c++/106322] i386: Wrong code at O2 level (O0 / O1 are working)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106322
--- Comment #1 from Mathieu Malaterre ---
I can reduce the gtest code to simply:
```
HWY_NOINLINE void TestAllMulHigh() {
ForPartialVectors test;
test(int16_t());
// test(uint16_t());
}
```
