[r12-5301 Regression] FAIL: gcc.dg/tree-ssa/if-to-switch-3.c scan-tree-dump iftoswitch "Condition chain with [^\n\r]* BBs transformed into a switch statement." on Linux/x86_64

[sunil.k.pandey via Gcc-patches]

On Linux/x86_64,

045206450386bcd774db3bde0c696828402361c6 is the first bad commit
commit 045206450386bcd774db3bde0c696828402361c6
Author: Richard Biener <rguent...@suse.de>
Date:   Fri Nov 12 10:21:22 2021 +0100

    tree-optimization/102880 - improve CD-DCE

caused

FAIL: gcc.dg/tree-ssa/if-to-switch-3.c scan-tree-dump iftoswitch "Condition 
chain with [^\n\r]* BBs transformed into a switch statement."

with GCC configured with

../../gcc/configure 
--prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r12-5301/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="tree-ssa.exp=gcc.dg/tree-ssa/if-to-switch-3.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="tree-ssa.exp=gcc.dg/tree-ssa/if-to-switch-3.c 
--target_board='unix{-m32\ -march=cascadelake}'"

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