[Bug middle-end/52047] New: [trans-mem] ICE: SIGSEGV in execute_tm_mark (trans-mem.c:2270) with -O -fgnu-tm -fprefetch-loop-arrays

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52047

             Bug #: 52047
           Summary: [trans-mem] ICE: SIGSEGV in execute_tm_mark
                    (trans-mem.c:2270) with -O -fgnu-tm
                    -fprefetch-loop-arrays
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 26509
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26509
reduced testcase (from libitm.c/stackundo.c)

Compiler output:
$ gcc -O -fgnu-tm -fprefetch-loop-arrays testcase.c
==24821== Invalid read of size 1
==24821==    at 0x9FC6E6: execute_tm_mark() (trans-mem.c:2270)
==24821==    by 0x8FB8E4: execute_one_pass(opt_pass*) (passes.c:2081)
==24821==    by 0x8FBCA4: execute_pass_list(opt_pass*) (passes.c:2136)
==24821==    by 0x8FBCB6: execute_pass_list(opt_pass*) (passes.c:2137)
==24821==    by 0xA5DFFD: tree_rest_of_compilation(tree_node*)
(tree-optimize.c:420)
==24821==    by 0x6AFE39: cgraph_expand_function(cgraph_node*)
(cgraphunit.c:1819)
==24821==    by 0x6B1D0B: cgraph_optimize() (cgraphunit.c:1886)
==24821==    by 0x6B2369: cgraph_finalize_compilation_unit()
(cgraphunit.c:1328)
==24821==    by 0x58EC1F: c_write_global_declarations() (c-decl.c:10030)
==24821==    by 0x9F081B: toplev_main(int, char**) (toplev.c:573)
==24821==    by 0x66E009C: (below main) (in /lib64/libc-2.13.so)
==24821==  Address 0xb0 is not stack'd, malloc'd or (recently) free'd
==24821== 
testcase.c: In function 'test1':
testcase.c:6:5: 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:
r183676 - crash