On Linux/x86_64,

b3cc5a1efead520bc977b4ba51f1328d01b3e516 is the first bad commit
commit b3cc5a1efead520bc977b4ba51f1328d01b3e516
Author: Richard Biener <rguent...@suse.de>
Date:   Fri Dec 15 10:32:29 2023 +0100

    tree-optimization/113026 - avoid vector epilog in more cases

caused

FAIL: gcc.c-torture/execute/950612-1.c   -O3 -fomit-frame-pointer 
-funroll-loops -fpeel-loops -ftracer -finline-functions  execution test
FAIL: gcc.c-torture/execute/950612-1.c   -O3 -g  execution test
FAIL: gcc.c-torture/execute/builtin-bitops-1.c   -O3 -fomit-frame-pointer 
-funroll-loops -fpeel-loops -ftracer -finline-functions  execution test
FAIL: gcc.c-torture/execute/builtin-bitops-1.c   -O3 -g  execution test
FAIL: gcc.dg/vect/vect-early-break_74.c execution test
FAIL: gcc.dg/vect/vect-early-break_74.c -flto -ffat-lto-objects execution test
FAIL: gcc.dg/vect/vect-early-break_78.c execution test
FAIL: gcc.dg/vect/vect-early-break_78.c -flto -ffat-lto-objects execution test
FAIL: gfortran.dg/power_8.f90   -O3 -fomit-frame-pointer -funroll-loops 
-fpeel-loops -ftracer -finline-functions  execution test
FAIL: gfortran.dg/power_8.f90   -O3 -g  execution test

with GCC configured with

../../gcc/configure 
--prefix=/export/users/haochenj/src/gcc-bisect/master/master/r14-7003/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="execute.exp=gcc.c-torture/execute/950612-1.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/950612-1.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/builtin-bitops-1.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/builtin-bitops-1.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="vect.exp=gcc.dg/vect/vect-early-break_74.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="vect.exp=gcc.dg/vect/vect-early-break_74.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="vect.exp=gcc.dg/vect/vect-early-break_78.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="vect.exp=gcc.dg/vect/vect-early-break_78.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gfortran.dg/power_8.f90 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gfortran.dg/power_8.f90 
--target_board='unix{-m64\ -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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