On Linux/x86_64,

55a3be2f5255d69e740d61b2c5aaba1ccbc643b8 is the first bad commit
commit 55a3be2f5255d69e740d61b2c5aaba1ccbc643b8
Author: Richard Biener <rguent...@suse.de>
Date:   Mon Oct 4 10:57:45 2021 +0200

    tree-optimization/102570 - teach VN about internal functions

caused

FAIL: gfortran.dg/predict-2.f90   -O   scan-tree-dump-times profile_estimate 
"Fortran loop preheader heuristics of edge" 2

with GCC configured with

../../gcc/configure 
--prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r12-4143/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="dg.exp=gfortran.dg/predict-2.f90 --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg.exp=gfortran.dg/predict-2.f90 --target_board='unix{-m32\ 
-march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg.exp=gfortran.dg/predict-2.f90 --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg.exp=gfortran.dg/predict-2.f90 --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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