[Bug target/85126] New: [8 regression] gcc.target/powerpc/pr69946.c fails on powerpc64 BE starting with r254213

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85126

            Bug ID: 85126
           Summary: [8 regression] gcc.target/powerpc/pr69946.c fails on
                    powerpc64 BE starting with r254213
           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: ---

The rlwinm the test case is expecting is no longer generated.

spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test2/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test2/gcc/
/home/seurer/gcc/gcc-test2/gcc/testsuite/gcc.target/powerpc/pr69946.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O2 -ffat-lto-objects -S
-o pr69946.s
PASS: gcc.target/powerpc/pr69946.c (test for excess errors)
PASS: gcc.target/powerpc/pr69946.c scan-assembler-not (?n)rlwinm.*,44,20,23
FAIL: gcc.target/powerpc/pr69946.c scan-assembler-times (?n)rlwinm.*,12,20,23 1
(found 0 times)
                === gcc Summary ===

# of expected passes            2
# of unexpected failures        1

<       .ident  "GCC: (GNU) 8.0.0 20171030 (experimental) [trunk revision
254212]"
---
> 	.ident	"GCC: (GNU) 8.0.0 20171030 (experimental) [trunk revision 254213]"

18,19c18,20
<       addis 9,2,.LC0@toc@ha           # gpr load fusion, type long
<       ld 9,.LC0@toc@l(9)
---
> 	addis 10,2,.LC0@toc@ha		# gpr load fusion, type long
> 	ld 10,.LC0@toc@l(10)
> 	li 9,-1
22,26c23,28
<       ld 9,0(9)
<       lwz 3,0(9)
<       rlwinm 3,3,12,20,23
<       ori 3,3,0x11
<       rotldi 3,3,52
---
> 	ld 10,0(10)
> 	lwz 3,0(10)
> 	rldicr 3,3,32,3
> 	rldicl 3,3,1,2
> 	rldicr 3,3,63,3
> 	rldimi 3,9,52,11