[r16-517 Regression] FAIL: gcc.target/i386/pr78794.c scan-assembler pandn on Linux/x86_64

"haochen.jiang via Gcc-regression" <[email protected]>
Newsgroups gmane.comp.gcc.regression,gmane.comp.gcc.patches
Message-ID <[email protected]>
On Linux/x86_64,

993aa0bd28722c7f01fb8310f1c79814aef217ed is the first bad commit
commit 993aa0bd28722c7f01fb8310f1c79814aef217ed
Author: Jan Hubicka <[email protected]>
Date:   Sat May 10 22:23:48 2025 +0200

    i386: Fix some problems in stv cost model

caused

FAIL: gcc.target/i386/avx512vl-stv-rotatedi-1.c scan-assembler-times vpro[lr]q 29
FAIL: gcc.target/i386/pr78794.c scan-assembler pandn

with GCC configured with

../../gcc/configure --prefix=/export/users/haochenj/src/gcc-bisect/master/master/r16-517/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}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/avx512vl-stv-rotatedi-1.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr78794.c --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr78794.c --target_board='unix{-m32\ -march=cascadelake}'"

(Please do not reply to this email, for question about this report, contact me at haochen dot jiang at intel.com.)
(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.)
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