[Bug target/81535] New: [8 regression] gcc.target/powerpc/pr79439.c fails starting with r250442

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81535

            Bug ID: 81535
           Summary: [8 regression] gcc.target/powerpc/pr79439.c fails
                    starting with r250442
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: seurer at gcc dot gnu.org
  Target Milestone: ---

I noticed this on a powerpc64le power8 system:

spawn /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/pr79439.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O2 -fpic
-ffat-lto-objects -S -o pr79439.s
PASS: gcc.target/powerpc/pr79439.c (test for excess errors)
PASS: gcc.target/powerpc/pr79439.c scan-assembler-times \\mbl f\\M 1
PASS: gcc.target/powerpc/pr79439.c scan-assembler-times \\mbl g\\M 1
PASS: gcc.target/powerpc/pr79439.c scan-assembler-times \\mbl rec\\M 1
FAIL: gcc.target/powerpc/pr79439.c scan-assembler-times \\mnop\\M 3

seurer@genoa:~/gcc/build/gcc-test$ diff pr79439.s.r250441 pr79439.s.r250442
46,47c46
<       bl rec
<       nop
---
> 	bl rec.localalias.0
54c53,54
<       .ident  "GCC: (GNU) 8.0.0 20170721 (experimental) [trunk revision
250441]"
---
> 	.set	rec.localalias.0,rec
> 	.ident	"GCC: (GNU) 8.0.0 20170721 (experimental) [trunk revision 250442]"