[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

[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: unassigned@gcc.gnu.org
        ReportedBy: zsojka@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

[Bug tree-optimization/46498] [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

[rguenth at gcc dot gnu.org]

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

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2010.11.16 15:59:26
         AssignedTo|unassigned at gcc dot       |rguenth at gcc dot gnu.org
                   |gnu.org                     |
   Target Milestone|---                         |4.5.2
     Ever Confirmed|0                           |1

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-11-16 15:59:26 UTC ---
Mine.

[Bug tree-optimization/46498] [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

[rguenth at gcc dot gnu.org]

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

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-11-17 10:43:25 UTC ---
Author: rguenth
Date: Wed Nov 17 10:43:21 2010
New Revision: 166861

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=166861
Log:
2010-11-16  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/46498
    * tree-ssa-dce.c (perform_tree_ssa_dce): Compute dominator info.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-dce.c

[Bug tree-optimization/46498] [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

[rguenth at gcc dot gnu.org]

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

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-11-17 10:46:40 UTC ---
Author: rguenth
Date: Wed Nov 17 10:46:36 2010
New Revision: 166862

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=166862
Log:
2010-11-17  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/46498
    * tree-ssa-dce.c (perform_tree_ssa_dce): Compute dominator info.

Modified:
    branches/gcc-4_5-branch/gcc/ChangeLog
    branches/gcc-4_5-branch/gcc/tree-ssa-dce.c

[Bug tree-optimization/46498] [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

[rguenth at gcc dot gnu.org]

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

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-11-17 11:18:37 UTC ---
Fixed.