[Bug middle-end/46461] New: [4.6 Regression] ICE: invalid argument to gimple call at -O with __builtin_memset()

[Bug middle-end/46461] New: [4.6 Regression] ICE: invalid argument to gimple call at -O with __builtin_memset()

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46461

           Summary: [4.6 Regression] ICE: invalid argument to gimple call
                    at -O with __builtin_memset()
           Product: gcc
           Version: 4.6.0
            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


----- testcase.c -----
void
foo (char *c)
{
  c[7] = 0xff;
  __builtin_memset (c + 8, 0xff, 8);
}
----------------------

Compiler output:
$ gcc -O testcase.c
testcase.c: In function 'foo':
testcase.c:6:1: error: invalid argument to gimple call
&MEM[(char *)c_1(D) + 7B]

Strangely, no regular ICE message i s given.

With -foptimize-sibling-calls, there is the message:
$ gcc -O -foptimize-sibling-calls testcase.c 
testcase.c: In function 'foo':
testcase.c:6:1: error: invalid argument to gimple call
&MEM[(char *)c_1(D) + 7B]
testcase.c:6:1: internal compiler error: in refs_may_alias_p_1, at
tree-ssa-alias.c:989
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugs.gentoo.org/> for instructions.

Tested revisions:
r166604 - crash
r166509 - crash
r163636 - OK
4.5 r166509 - OK

[Bug middle-end/46461] [4.6 Regression] ICE: invalid argument to gimple call at -O with __builtin_memset()

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46461

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2010.11.13 15:07:08
                 CC|                            |jakub at redhat dot com
   Target Milestone|---                         |4.6.0
     Ever Confirmed|0                           |1

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> 2010-11-13 15:07:08 UTC ---
This is caused by revision 165401:

http://gcc.gnu.org/ml/gcc-cvs/2010-10/msg00585.html

[Bug middle-end/46461] [4.6 Regression] ICE: invalid argument to gimple call at -O with __builtin_memset()

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46461

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1

[Bug middle-end/46461] [4.6 Regression] ICE: invalid argument to gimple call at -O with __builtin_memset()

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46461

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|jakub at redhat dot com     |jakub at gcc dot gnu.org
         AssignedTo|unassigned at gcc dot       |jakub at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-11-13 17:44:22 UTC ---
Mine then.

[Bug tree-optimization/46461] [4.6 Regression] ICE: invalid argument to gimple call at -O with __builtin_memset()

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46461

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-11-15 10:45:18 UTC ---
Created attachment 22396
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22396
gcc46-pr46461.patch

Untested patch.

[Bug tree-optimization/46461] [4.6 Regression] ICE: invalid argument to gimple call at -O with __builtin_memset()

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46461

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-11-15 22:30:24 UTC ---
Author: jakub
Date: Mon Nov 15 22:30:15 2010
New Revision: 166776

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=166776
Log:
    PR tree-optimization/46461
    * tree-ssa-forwprop.c (simplify_builtin_call): Ensure ptr1 is
    a gimple val.

    * gcc.c-torture/compile/pr46461.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr46461.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-forwprop.c

[Bug tree-optimization/46461] [4.6 Regression] ICE: invalid argument to gimple call at -O with __builtin_memset()

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46461

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-11-15 22:43:22 UTC ---
Fixed.