[Bug target/9663] [arm] gcc-20030127 misses an optimization opportunity

[fredrik.hederstierna@securitas-direct.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=9663

Fredrik Hederstierna <fredrik.hederstierna@securitas-direct.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |fredrik.hederstierna@securi
                   |                            |tas-direct.com

--- Comment #10 from Fredrik Hederstierna <fredrik.hederstierna@securitas-direct.com> ---
Created attachment 46457
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46457&action=edit
Testcase from CSiBE teem sources

Testcase from CSiBE teem sources
Tested with gcc-9.1.0 for ARM 32bit targets.

Without peephole2

00000000 <nrrdRangeSet>:
   0:   e92d407f        push    {r0, r1, r2, r3, r4, r5, r6, lr}
   4:   e2504000        subs    r4, r0, #0
   8:   0a00003f        beq     10c <nrrdRangeSet+0x10c>
   c:   e3510000        cmp     r1, #0
  10:   e1a05001        mov     r5, r1

With peephole2

00000000 <nrrdRangeSet>:
   0:   e92d407f        push    {r0, r1, r2, r3, r4, r5, r6, lr}
   4:   e2504000        subs    r4, r0, #0
   8:   0a00003e        beq     108 <nrrdRangeSet+0x108>
   c:   e2515000        subs    r5, r1, #0

/Fredrik