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* [Bug tree-optimization/45301]  New: [4.6 Regression] ICE: SIGSEGV in instantiate_scev_r (tree-scalar-evolution.c:3391) with -O2 -ftree-loop-distribution -fgraphite-identity
@ 2010-08-17  0:47 zsojka at seznam dot cz
  2010-08-17  0:48 ` [Bug tree-optimization/45301] " zsojka at seznam dot cz
                   ` (2 more replies)
  0 siblings, 3 replies; 6+ messages in thread
From: zsojka at seznam dot cz @ 2010-08-17  0:47 UTC (permalink / raw)
  To: gcc-bugs

Command line:
$ gcc -O1 -ftree-loop-distribution -fgraphite-identity -fstrict-aliasing
-ftree-pre testcase.c
or
$ gcc -O2 -ftree-loop-distribution -fgraphite-identity testcase.c

Valgrind output:
==28123== Invalid read of size 8
==28123==    at 0x9210E1: instantiate_scev_r (tree-scalar-evolution.c:3391)
==28123==    by 0x9213C1: instantiate_scev_r (tree-scalar-evolution.c:2296)
==28123==    by 0x92217A: resolve_mixers (tree-scalar-evolution.c:2692)
==28123==    by 0x922378: analyze_scalar_evolution_in_loop
(tree-scalar-evolution.c:2039)
==28123==    by 0x922D2F: simple_iv (tree-scalar-evolution.c:3132)
==28123==    by 0x8C9114: dr_analyze_innermost (tree-data-ref.c:767)
==28123==    by 0x8C95C9: create_data_ref (tree-data-ref.c:964)
==28123==    by 0x8D0EDE: graphite_find_data_references_in_stmt
(tree-data-ref.c:4262)
==28123==    by 0xF412F9: scopdet_basic_block_info
(graphite-scop-detection.c:285)
==28123==    by 0xF41D6B: build_scops_1 (graphite-scop-detection.c:750)
==28123==    by 0xF418DB: scopdet_basic_block_info
(graphite-scop-detection.c:636)
==28123==    by 0xF41D6B: build_scops_1 (graphite-scop-detection.c:750)
==28123==  Address 0x10 is not stack'd, malloc'd or (recently) free'd
==28123== 
testcase.c: In function 'foo':
testcase.c:8:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r163261 - crash
r162940 - OK


-- 
           Summary: [4.6 Regression] ICE: SIGSEGV in instantiate_scev_r
                    (tree-scalar-evolution.c:3391) with -O2 -ftree-loop-
                    distribution -fgraphite-identity
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: zsojka at seznam dot cz
  GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45301


^ permalink raw reply	[flat|nested] 6+ messages in thread
[parent not found: <bug-45301-4@http.gcc.gnu.org/bugzilla/>]
end of thread, other threads:[~2010-11-30 21:44 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2010-08-17  0:47 [Bug tree-optimization/45301] New: [4.6 Regression] ICE: SIGSEGV in instantiate_scev_r (tree-scalar-evolution.c:3391) with -O2 -ftree-loop-distribution -fgraphite-identity zsojka at seznam dot cz
2010-08-17  0:48 ` [Bug tree-optimization/45301] " zsojka at seznam dot cz
2010-08-17  9:58 ` rguenth at gcc dot gnu dot org
2010-09-02 11:18 ` rguenth at gcc dot gnu dot org
     [not found] <bug-45301-4@http.gcc.gnu.org/bugzilla/>
2010-11-18 16:18 ` zsojka at seznam dot cz
2010-11-30 22:15 ` spop at gcc dot gnu.org

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