On Linux/x86_64,

040e64b09d4422c7d3c51bee098043782112b924 is the first bad commit
commit 040e64b09d4422c7d3c51bee098043782112b924
Author: Richard Biener <rguent...@suse.de>
Date:   Fri Apr 14 11:35:58 2023 +0200

    Fix vect-simd-clone testcase dump scanning

caused

FAIL: gcc.dg/vect/vect-simd-clone-16f.c scan-tree-dump-times vect "[\\n\\r] 
[^\\n]* = foo\\.simdclone" 4
FAIL: gcc.dg/vect/vect-simd-clone-17f.c scan-tree-dump-times vect "[\\n\\r] 
[^\\n]* = foo\\.simdclone" 4
FAIL: gcc.dg/vect/vect-simd-clone-18f.c scan-tree-dump-times vect "[\\n\\r] 
[^\\n]* = foo\\.simdclone" 4

with GCC configured with

../../gcc/configure 
--prefix=/export/users/haochenj/src/gcc-bisect/master/master/r13-7179/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="vect.exp=gcc.dg/vect/vect-simd-clone-16f.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="vect.exp=gcc.dg/vect/vect-simd-clone-17f.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="vect.exp=gcc.dg/vect/vect-simd-clone-18f.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)

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