[r15-3464 Regression] FAIL: gcc.target/i386/avx10_2-partial-bf-vector-fma-1.c scan-assembler-times vfnmsub132nepbf16[ \\t]+[^{\n]*%xmm[0-9]+[^\n\r]*%xmm[0-9]+[^\n\r]*%xmm[0-9]+(?:\n|[ \\t]+#) 2 on Linux/x86_64

[haochen.jiang]

On Linux/x86_64,

f9ca3fd1fe30f3ee6725bfe4a612e9a1234c11ac is the first bad commit
commit f9ca3fd1fe30f3ee6725bfe4a612e9a1234c11ac
Author: Levy Hsu <admin@levyhsu.com>
Date:   Mon Sep 2 13:52:38 2024 +0800

    i386: Support partial vectorized FMA for V2BF/V4BF

caused

FAIL: gcc.target/i386/avx10_2-partial-bf-vector-fma-1.c scan-assembler-times vfmadd132nepbf16[ \\t]+[^{\n]*%xmm[0-9]+[^\n\r]*%xmm[0-9]+[^\n\r]*%xmm[0-9]+(?:\n|[ \\t]+#) 2
FAIL: gcc.target/i386/avx10_2-partial-bf-vector-fma-1.c scan-assembler-times vfmsub132nepbf16[ \\t]+[^{\n]*%xmm[0-9]+[^\n\r]*%xmm[0-9]+[^\n\r]*%xmm[0-9]+(?:\n|[ \\t]+#) 2
FAIL: gcc.target/i386/avx10_2-partial-bf-vector-fma-1.c scan-assembler-times vfnmadd132nepbf16[ \\t]+[^{\n]*%xmm[0-9]+[^\n\r]*%xmm[0-9]+[^\n\r]*%xmm[0-9]+(?:\n|[ \\t]+#) 2
FAIL: gcc.target/i386/avx10_2-partial-bf-vector-fma-1.c scan-assembler-times vfnmsub132nepbf16[ \\t]+[^{\n]*%xmm[0-9]+[^\n\r]*%xmm[0-9]+[^\n\r]*%xmm[0-9]+(?:\n|[ \\t]+#) 2
FAIL: gcc.target/i386/avx10_2-partial-bf-vector-fma-1.c (test for excess errors)

with GCC configured with

../../gcc/configure --prefix=/export/users/haochenj/src/gcc-bisect/master/master/r15-3464/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/avx10_2-partial-bf-vector-fma-1.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.)