On Linux/x86_64,
f6971e28e71eda7f8a1d1247f57ee7f16828864d is the first bad commit
commit f6971e28e71eda7f8a1d1247f57ee7f16828864d
Author: Roger Sayle <[email protected]>
Date: Thu May 28 20:50:11 2026 +0100
x86_64 SSE: Handle SUBREG conversions in TImode STV (for ptest).
caused
FAIL: decimal/make-decimal.cc -std=gnu++20 (test for excess errors)
with GCC configured with
../../gcc/configure
--prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r17-916/usr
--enable-clocale=gnu --with-system-zlib --with-demangler-in-ld
--with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet --without-isl
--enable-libmpx x86_64-linux --disable-bootstrap
To reproduce:
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check
RUNTESTFLAGS="conformance.exp=decimal/make-decimal.cc
--target_board='unix{-m32\ -march=cascadelake}'"
(Please directly reply to this email for question about this report.)
(If you met problems with cascadelake related, disabling AVX512F in command
line might save that.)
(However, please make sure that there is no potential problems with AVX512.)
