On Linux/x86_64,

2f0b6a971a051f6e687a15dd2fa4bf431381e551 is the first bad commit
commit 2f0b6a971a051f6e687a15dd2fa4bf431381e551
Author: Aldy Hernandez <al...@redhat.com>
Date:   Wed Oct 27 18:22:29 2021 +0200

    Reorder relation calculating code in the path solver.

caused

FAIL: gcc.dg/guality/pr41616-1.c   -O2  -DPREVENT_OPTIMIZATION  execution test
FAIL: gcc.dg/guality/pr41616-1.c   -O2 -flto -fno-use-linker-plugin 
-flto-partition=none  -DPREVENT_OPTIMIZATION execution test
FAIL: gcc.dg/guality/pr41616-1.c   -O2 -flto -fuse-linker-plugin 
-fno-fat-lto-objects  -DPREVENT_OPTIMIZATION execution test
FAIL: gcc.dg/guality/pr41616-1.c   -O3 -g  -DPREVENT_OPTIMIZATION  execution 
test

with GCC configured with

../../gcc/configure 
--prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r12-4744/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="guality.exp=gcc.dg/guality/pr41616-1.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="guality.exp=gcc.dg/guality/pr41616-1.c --target_board='unix{-m32\ 
-march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="guality.exp=gcc.dg/guality/pr41616-1.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="guality.exp=gcc.dg/guality/pr41616-1.c --target_board='unix{-m64\ 
-march=cascadelake}'"

(Please do not reply to this email, for question about this report, contact me 
at skpgkp2 at gmail dot com)

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