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re PR tree-optimization/40542 (vectorizes access to volatile array) 

PR tree-optimization/40542
	* tree-vect-analyze.c (vect_determine_vectorization_factor): Don't 
	vectorize volatile types.

From-SVN: r149092
This commit is contained in:
Ira Rosen 2009-06-30 11:56:21 +00:00 committed by Ira Rosen
parent f3bb6a6b4a
commit 57809812cf
4 changed files with 34 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2009-06-30 Ira Rosen <irar@il.ibm.com>
PR tree-optimization/40542
* tree-vect-analyze.c (vect_determine_vectorization_factor): Don't
vectorize volatile types.
2009-06-29 Janis Johnson <janis187@us.ibm.com>
PR c/39902

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2009-06-30 Ira Rosen <irar@il.ibm.com>
PR tree-optimization/40542
* gcc.dg/vect/pr40542.c: New test.
2009-06-29 Janis Johnson <janis187@us.ibm.com>
PR c/39902

14
gcc/testsuite/gcc.dg/vect/pr40542.c Normal file
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@ -0,0 +1,14 @@
/* { dg-do compile } */
void
volarr_cpy(char *d, volatile char *s)
{
int i;
for (i = 0; i < 16; i++)
d[i] = s[i];
}
/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { xfail *-*-* } } } */
/* { dg-final { cleanup-tree-dump "vect" } } */

9
gcc/tree-vect-analyze.c
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@ -199,6 +199,15 @@ vect_determine_vectorization_factor (loop_vec_info loop_vinfo)
print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
}
if (gimple_has_volatile_ops (stmt))
{
if (vect_print_dump_info (REPORT_UNVECTORIZED_LOOPS))
fprintf (vect_dump, "not vectorized: stmt has volatile"
" operands");
return false;
}
gcc_assert (stmt_info);
/* skip stmts which do not need to be vectorized. */