OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

re PR tree-optimization/23434 (ICE: Segmentation fault compiling gsl1.5 at -O2) 

PR tree-optimization/23434
        * tree-ssa-loop-niter.c (proved_non_wrapping_p): Give up when
        the iteration bound is not an INTEGER_CST.

From-SVN: r103315
This commit is contained in:
Sebastian Pop 2005-08-21 12:48:23 +02:00 committed by Sebastian Pop
parent 429268fc04
commit a1596edc4b
3 changed files with 29 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2005-08-21 Sebastian Pop <pop@cri.ensmp.fr>
PR tree-optimization/23434
* tree-ssa-loop-niter.c (proved_non_wrapping_p): Give up when
the iteration bound is not an INTEGER_CST.
2005-08-21 Dorit Nuzman <dorit@il.ibm.com>
* tree-vect-transform.c (get_initial_def_for_reduction): Set

19
gcc/testsuite/gcc.dg/tree-ssa/pr23434.c Normal file
View File

@ -0,0 +1,19 @@
/* { dg-do compile } */
/* { dg-options "-O2" } */
cblas_csyr2k (int N, void *A, int lda, float *B, int ldb, float *C, int k)
{
int i, j;
for (;; k ++)
{
for (i = 0; i < N; i ++)
{
float t = ((float * ) A) [i];
for (j = i; j < N; j ++)
{
C [i + j] = B [ldb] * ((float *) A) [k];
C [lda] = 0 ;
}
}
}
}

4
gcc/tree-ssa-loop-niter.c
View File

@ -1653,6 +1653,10 @@ proved_non_wrapping_p (tree at_stmt,
else
valid_niter = fold_convert (TREE_TYPE (bound), valid_niter);
/* Give up if BOUND was not folded to an INTEGER_CST, as in PR23434. */
if (TREE_CODE (bound) != INTEGER_CST)
return false;
/* After the statement niter_bound->at_stmt we know that anything is
executed at most BOUND times. */
if (at_stmt && stmt_dominates_stmt_p (niter_bound->at_stmt, at_stmt))