[Bug tree-optimization/59038] [4.9 Regression] r204398 causes 186.crafty init.c to be miscompiled

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59038

--- Comment #2 from Richard Biener rguenth at gcc dot gnu.org ---
Author: rguenth
Date: Fri Nov  8 08:44:02 2013
New Revision: 204561

URL: http://gcc.gnu.org/viewcvs?rev=204561root=gccview=rev
Log:
2013-11-08  Richard Biener  rguent...@suse.de

PR tree-optimization/59038
PR tree-optimization/58955
* tree-loop-distribution.c (pg_add_dependence_edges): Revert
previous change.  Handle known dependences correctly.

* gcc.dg/torture/pr59038.c: New testcase.

Added:
trunk/gcc/testsuite/gcc.dg/torture/pr59038.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-loop-distribution.c

[Bug tree-optimization/59038] [4.9 Regression] r204398 causes 186.crafty init.c to be miscompiled

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59038

Richard Biener rguenth at gcc dot gnu.org changed:

   What|Removed |Added

 Status|ASSIGNED|RESOLVED
 Resolution|--- |FIXED

--- Comment #3 from Richard Biener rguenth at gcc dot gnu.org ---
Fixed.

[Bug tree-optimization/59038] [4.9 Regression] r204398 causes 186.crafty init.c to be miscompiled

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59038

Richard Biener rguenth at gcc dot gnu.org changed:

   What|Removed |Added

 CC||su at cs dot ucdavis.edu

--- Comment #4 from Richard Biener rguenth at gcc dot gnu.org ---
*** Bug 59045 has been marked as a duplicate of this bug. ***

[Bug tree-optimization/59038] [4.9 Regression] r204398 causes 186.crafty init.c to be miscompiled

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59038

Richard Biener rguenth at gcc dot gnu.org changed:

   What|Removed |Added

 Status|UNCONFIRMED |ASSIGNED
   Last reconfirmed||2013-11-07
   Assignee|unassigned at gcc dot gnu.org  |rguenth at gcc dot 
gnu.org
   Target Milestone|--- |4.9.0
 Ever confirmed|0   |1

[Bug tree-optimization/59038] [4.9 Regression] r204398 causes 186.crafty init.c to be miscompiled

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59038

--- Comment #1 from Richard Biener rguenth at gcc dot gnu.org ---
extern void abort (void);

unsigned char first_ones_8bit[256];
unsigned char connected_passed[256];

int
main ()
{
  int i, j;
  for (i=0;i256;i++){
  connected_passed[i]=0;
  first_ones_8bit[i]=0;
  for (j=7;j0;j--){
  if ((i  (3(7-j))) == (3(7-j))){
  connected_passed[i]=j;
  break;
  }
  }
  }
  if (connected_passed[3] != 7)
abort ();
  return 0;
}