[Bug middle-end/44185] New: [4.6 regression] New prefetch test failures

[hjl dot tools at gmail dot com]

On Linux/ia32, revision 159516 gave:

FAIL: gcc.dg/tree-ssa/prefetch-6.c scan-assembler-times prefetcht 5
FAIL: gcc.dg/tree-ssa/prefetch-6.c scan-tree-dump-times aprefetch "Issued
prefetch" 5
FAIL: gcc.dg/tree-ssa/prefetch-7.c scan-assembler-times mfence 2
FAIL: gcc.dg/tree-ssa/prefetch-7.c scan-assembler-times movnti 2
FAIL: gcc.dg/tree-ssa/prefetch-7.c scan-assembler-times prefetchnta 2
FAIL: gcc.dg/tree-ssa/prefetch-7.c scan-assembler-times prefetcht 1
FAIL: gcc.dg/tree-ssa/prefetch-7.c scan-assembler-times prefetchw 5
FAIL: gcc.dg/tree-ssa/prefetch-7.c scan-tree-dump-times aprefetch "Issued
nontemporal prefetch" 3
FAIL: gcc.dg/tree-ssa/prefetch-7.c scan-tree-dump-times aprefetch "Issued
prefetch" 5
FAIL: gcc.dg/tree-ssa/prefetch-7.c scan-tree-dump-times aprefetch "a
nontemporal store" 2
FAIL: gcc.dg/tree-ssa/prefetch-7.c scan-tree-dump-times optimized "={nt}" 2
FAIL: gcc.dg/tree-ssa/prefetch-7.c scan-tree-dump-times optimized
"__builtin_ia32_mfence" 2
FAIL: gcc.dg/tree-ssa/prefetch-7.c scan-tree-dump-times optimized
"builtin_prefetch" 8


Revision 159511 is OK.  Revisions 159514/159515:

http://gcc.gnu.org/ml/gcc-cvs/2010-05/msg00566.html
http://gcc.gnu.org/ml/gcc-cvs/2010-05/msg00567.html

may be the cause.


-- 
           Summary: [4.6 regression] New prefetch test failures
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl dot tools at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44185