[Bug tree-optimization/46498] New: [4.5/4.6 Regression] ICE: in eliminate_unnecessary_stmts, at tree-ssa-dce.c:1112 with -O -funsafe-math-optimizations -fno-tree-dominator-opts -fno-tree-reassoc

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46498

           Summary: [4.5/4.6 Regression] ICE: in
                    eliminate_unnecessary_stmts, at tree-ssa-dce.c:1112
                    with -O -funsafe-math-optimizations
                    -fno-tree-dominator-opts -fno-tree-reassoc
           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


----- testcase.c -----
void foo (double d) {}
----------------------

Compiler output:
$ gcc -O -funsafe-math-optimizations -fno-tree-dominator-opts -fno-tree-reassoc
testcase.c
testcase.c: In function 'foo':
testcase.c:1:6: internal compiler error: in eliminate_unnecessary_stmts, at
tree-ssa-dce.c:1181
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r166795 - crash
r153685 - crash
4.5 r166509 - crash
4.4 r166509 - OK