[Bug target/51237] New: [4.7 Regression] FAIL: gcc.dg/tree-ssa/prefetch-[89].c (internal compiler error) caused by revision 181491

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51237

             Bug #: 51237
           Summary: [4.7 Regression] FAIL: gcc.dg/tree-ssa/prefetch-[89].c
                    (internal compiler error) caused by revision 181491
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: domi...@lps.ens.fr
                CC: hjl.to...@gmail.com
              Host: i?86-*-* x86_64-*-*
            Target: i?86-*-* x86_64-*-*
             Build: i?86-*-* x86_64-*-*


Since revision 181491 the tests gcc.dg/tree-ssa/prefetch-[89].c fail with

[macbook] f90/bug% gcc47 -m32 -O2 -fprefetch-loop-arrays -msse2 -mfpmath=sse
--param simultaneous-prefetches=100
/opt/gcc/work/gcc/testsuite/gcc.dg/tree-ssa/prefetch-8.c
/opt/gcc/work/gcc/testsuite/gcc.dg/tree-ssa/prefetch-8.c: In function 'test':
/opt/gcc/work/gcc/testsuite/gcc.dg/tree-ssa/prefetch-8.c:16:1: error:
unrecognizable insn:
(insn 45 44 46 4 (set (mem:SI (reg:SI 95 [ ivtmp.10 ]) [2 MEM[base: D.2930_13,
offset: 0B]+0 S4 A32])
        (unspec:SI [
                (reg:SI 100)
            ] UNSPEC_MOVNT))
/opt/gcc/work/gcc/testsuite/gcc.dg/tree-ssa/prefetch-8.c:15 -1
     (nil))
/opt/gcc/work/gcc/testsuite/gcc.dg/tree-ssa/prefetch-8.c:16:1: internal
compiler error: in extract_insn, at recog.c:2137
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[macbook] f90/bug% gcc47 -m32 -O2 -fprefetch-loop-arrays -march=athlon -msse2
-mfpmath=sse --param simultaneous-prefetches=100
/opt/gcc/work/gcc/testsuite/gcc.dg/tree-ssa/prefetch-8.c
/opt/gcc/work/gcc/testsuite/gcc.dg/tree-ssa/prefetch-8.c: In function 'test':
/opt/gcc/work/gcc/testsuite/gcc.dg/tree-ssa/prefetch-8.c:16:1: error:
unrecognizable insn:
(insn 45 44 46 4 (set (mem:SI (reg:SI 95 [ ivtmp.10 ]) [2 MEM[base: D.2960_13,
offset: 0B]+0 S4 A32])
        (unspec:SI [
                (reg:SI 100)
            ] UNSPEC_MOVNT))
/opt/gcc/work/gcc/testsuite/gcc.dg/tree-ssa/prefetch-8.c:15 -1
     (nil))
/opt/gcc/work/gcc/testsuite/gcc.dg/tree-ssa/prefetch-8.c:16:1: internal
compiler error: in extract_insn, at recog.c:2137
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.