[Bug tree-optimization/46537] New: [4.6 Regression] ICE: SIGSEGV in simplify_replace_fn_rtx (simplify-rtx.c:362) with -g -O -fipa-cp -fipa-cp-clone -freorder-blocks

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46537

           Summary: [4.6 Regression] ICE: SIGSEGV in
                    simplify_replace_fn_rtx (simplify-rtx.c:362) with -g
                    -O -fipa-cp -fipa-cp-clone -freorder-blocks
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: zso...@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 22443
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22443
reduced testcase

Compiler output:
$ gcc -g -O -fipa-cp -fipa-cp-clone -freorder-blocks testcase.C
testcase.C: In function 'void test5()':
testcase.C:56:1: 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:
r166868 - crash
r165699 - OK
r163636 - OK
4.5 r166509 - OK