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From: "luoxhu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/103802] New: [12 regression] recip-3.c fails after 
 r12-6087 on Power m32
Date: Wed, 22 Dec 2021 08:56:44 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103802

            Bug ID: 103802
           Summary: [12 regression] recip-3.c fails after  r12-6087 on
                    Power m32
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: luoxhu at gcc dot gnu.org
  Target Milestone: ---

Invoking the compiler as /home/luoxhu/workspace/gcc-master_build/gcc/xgcc
-B/home/luoxhu/workspace/gcc-master_build/gcc/
/home/luoxhu/workspace/gcc-master/gcc/testsuite/gcc.dg/tree-ssa/recip-3.c=20
-fdiagnostics-plain-output   -O1 -fno-trapping-math -funsafe-math-optimizat=
ions
-fdump-tree-recip -S  -m32  -o recip-3.s
Executing on host: /home/luoxhu/workspace/gcc-master_build/gcc/xgcc
-B/home/luoxhu/workspace/gcc-master_build/gcc/
/home/luoxhu/workspace/gcc-master/gcc/testsuite/gcc.dg/tree-ssa/recip-3.c=20
-fdiagnostics-plain-output   -O1 -fno-trapping-math -funsafe-math-optimizat=
ions
-fdump-tree-recip -S  -m32  -o recip-3.s    (timeout =3D 300)
gcc.dg/tree-ssa/recip-3.c: pattern found 3 times
FAIL: gcc.dg/tree-ssa/recip-3.c scan-tree-dump-times recip " / " 5


Reson is m32 fail to cunroll due to
 recip-3.m32.c.172t.cunroll:   Not unrolling loop 1: size would grow.=