[Bug target/81363] New: [8 regression] FAIL: gcc.dg/vect/pr51581-1.c (internal compiler error)

["schwab at linux-m68k dot org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81363

            Bug ID: 81363
           Summary: [8 regression] FAIL: gcc.dg/vect/pr51581-1.c (internal
                    compiler error)
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
                CC: cel at us dot ibm.com
  Target Milestone: ---
            Target: powerpc*-*-*

$ gcc/xgcc -B gcc/ -maltivec -ftree-vectorize -fno-vect-cost-model -O2
../gcc/testsuite/gcc.dg/vect/pr51581-1.c
In file included from ../gcc/testsuite/gcc.dg/vect/pr51581-1.c:6:0:
../gcc/testsuite/gcc.dg/vect/../../gcc.c-torture/execute/pr51581-1.c: In
function ‘f1’:
../gcc/testsuite/gcc.dg/vect/../../gcc.c-torture/execute/pr51581-1.c:17:1:
error: unable to generate reloads for:
 }
 ^
(insn 82 95 85 10 (set (reg:V2DI 206)
        (unspec:V2DI [
                (reg:V4SI 150 [ vect__1.39 ])
                (reg:V4SI 207)
            ] UNSPEC_VMULESW))
"../gcc/testsuite/gcc.dg/vect/../../gcc.c-torture/execute/pr51581-1.c":16 1618
{altivec_vmulesw}
     (nil))
during RTL pass: reload
../gcc/testsuite/gcc.dg/vect/../../gcc.c-torture/execute/pr51581-1.c:17:1:
internal compiler error: in curr_insn_transform, at lra-constraints.c:3878