[Bug tree-optimization/56407] [4.7 Regression] Optimizations (-O2 -O3) make comparison of arrays of ints to fail

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56407

Richard Biener rguenth at gcc dot gnu.org changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution|--- |FIXED
   Target Milestone|4.7.4   |4.8.0
  Known to fail||4.7.4

--- Comment #5 from Richard Biener rguenth at gcc dot gnu.org ---
Fixed in 4.8.0.

[Bug tree-optimization/56407] [4.7 Regression] Optimizations (-O2 -O3) make comparison of arrays of ints to fail

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56407



Richard Biener rguenth at gcc dot gnu.org changed:



   What|Removed |Added



   Target Milestone|4.7.3   |4.7.4



--- Comment #4 from Richard Biener rguenth at gcc dot gnu.org 2013-04-11 
07:59:32 UTC ---

GCC 4.7.3 is being released, adjusting target milestone.

[Bug tree-optimization/56407] [4.7 Regression] Optimizations (-O2 -O3) make comparison of arrays of ints to fail

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56407



Richard Biener rguenth at gcc dot gnu.org changed:



   What|Removed |Added



   Priority|P3  |P2

  Component|c   |tree-optimization

  Known to work||4.8.0

[Bug tree-optimization/56407] [4.7 Regression] Optimizations (-O2 -O3) make comparison of arrays of ints to fail

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56407



--- Comment #2 from Richard Biener rguenth at gcc dot gnu.org 2013-04-03 
10:22:53 UTC ---

Testcase, also fails at -O2:



/* { dg-do run } */



extern void abort(void);

extern int rand(void);



static void copy(int *r,int *a,int na)

{

  int i;

  for( i = 0 ; i  na ; i++ )

r[i] = a[i];

}



static void foo(int *a,int na)

{

  int i;

  for( i = 0 ; i  na ; i++ )

a[i] = rand();

}



static int cmp(int *a,int *b,int n)

{

  int i;

  for( i = 0 ; i  n ; i++ )

if ( a[i] != b[i] )

  return -1;

  return 0;

}



void __attribute__((noinline,noclone))

test(int sz,int comm)

{

  int j,n;

  int v[64],w[64];

  for( j = 1 ; j = sz ; j++ )

{

  n = (2 * j - 1) * (2 * j - 1);

  foo(w,n);

  copy(v,w,n);

  if ( comm )

if ( cmp(v,w,n) ) abort ();

}

}



int main()

{

  test(2,1);

  return 0;

}

[Bug tree-optimization/56407] [4.7 Regression] Optimizations (-O2 -O3) make comparison of arrays of ints to fail

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56407



--- Comment #3 from Richard Biener rguenth at gcc dot gnu.org 2013-04-03 
10:26:53 UTC ---

Author: rguenth

Date: Wed Apr  3 10:25:23 2013

New Revision: 197399



URL: http://gcc.gnu.org/viewcvs?rev=197399root=gccview=rev

Log:

2013-04-03  Richard Biener  rguent...@suse.de



PR tree-optimization/56407

* gcc.dg/torture/pr56407.c: New testcase.



Added:

trunk/gcc/testsuite/gcc.dg/torture/pr56407.c

Modified:

trunk/gcc/testsuite/ChangeLog



Author: rguenth

Date: Wed Apr  3 10:26:13 2013

New Revision: 197400



URL: http://gcc.gnu.org/viewcvs?rev=197400root=gccview=rev

Log:

2013-04-03  Richard Biener  rguent...@suse.de



PR tree-optimization/56407

* gcc.dg/torture/pr56407.c: New testcase.



Added:

branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr56407.c

Modified:

branches/gcc-4_8-branch/gcc/testsuite/ChangeLog