[Bug target/112103] New: [14 regression] gcc.target/powerpc/rlwinm-0.c fails after r14-4941-gd1bb9569d70304

["seurer at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112103

            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="powerpc.exp=gcc.target/powerpc/rlwinm-0.c"
FAIL: gcc.target/powerpc/rlwinm-0.c scan-assembler-times (?n)^\\s+rldicl 3081
FAIL: gcc.target/powerpc/rlwinm-0.c scan-assembler-times (?n)^\\s+rlwinm 3093
# 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 needs
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.