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From: "seurer at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/112103] New: [14 regression]
 gcc.target/powerpc/rlwinm-0.c fails after r14-4941-gd1bb9569d70304
Date: Thu, 26 Oct 2023 16:44:50 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112103

            Bug ID: 112103
           Summary: [14 regression] gcc.target/powerpc/rlwinm-0.c fails
                    after r14-4941-gd1bb9569d70304
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: seurer at gcc dot gnu.org
  Target Milestone: ---

g:d1bb9569d7030490fe7bb35af432f934560d689d, r14-4941-gd1bb9569d70304
make  -k check-gcc RUNTESTFLAGS=3D"powerpc.exp=3Dgcc.target/powerpc/rlwinm-=
0.c"
FAIL: gcc.target/powerpc/rlwinm-0.c scan-assembler-times (?n)^\\s+rldicl 30=
81
FAIL: gcc.target/powerpc/rlwinm-0.c scan-assembler-times (?n)^\\s+rlwinm 30=
93
# of expected passes            5
# of unexpected failures        2

These changes in code output are OK as neither the original rlwinm nor the
rldicl actually have any effect.  So in the short term the test case just n=
eeds
to update its instruction counts.  We are tracking something to get rid of =
the
extraneous ops later.

seurer@ltcden2-lp1:~/gcc/git/build/gcc-test$ diff rlwinm-0.s.r14-4940
rlwinm-0.s.r14-4941
5371c5371
<       rlwinm 3,3,0,0xffff
---
> 	rldicl 3,3,0,32
6089c6089
<       rlwinm 3,3,0,0xff
---
> 	rldicl 3,3,0,32
8959c8959
<       rlwinm 3,3,0,0xffff
---
> 	rldicl 3,3,0,32
9677c9677
<       rlwinm 3,3,0,0xff
---
> 	rldicl 3,3,0,32
12546c12546
<       rlwinm 3,3,0,0xffff
---
> 	rldicl 3,3,0,32
13264c13264
<       rlwinm 3,3,0,0xff
---
> 	rldicl 3,3,0,32
16131c16131
<       rlwinm 3,3,0,0xffff
---
> 	rldicl 3,3,0,32
19715c19715
<       rlwinm 3,3,0,0xffff
---
> 	rldicl 3,3,0,32
23298c23298
<       rlwinm 3,3,0,0xffff
---
> 	rldicl 3,3,0,32


commit d1bb9569d7030490fe7bb35af432f934560d689d (HEAD)
Author: Roger Sayle <roger@nextmovesoftware.com>
Date:   Thu Oct 26 10:06:59 2023 +0100

    PR 91865: Avoid ZERO_EXTEND of ZERO_EXTEND in make_compound_operation.=