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re PR tree-optimization/18607 (Vectorizer: data_reference is overwritten in vect_analyze_data_refs)

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2004-11-30  Ira Rosen  <irar@il.ibm.com>

        PR tree-opt/18607
        * tree-vectorizer.c (vect_analyze_data_refs): Use temporary
        variable for data_reference when looking for memtag.

From-SVN: r91521
This commit is contained in:
Ira Rosen 2004-11-30 14:40:38 +00:00 committed by Dorit Nuzman
parent 1b3c8f4655
commit f2b60e4039
3 changed files with 56 additions and 4 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2004-11-30 Ira Rosen <irar@il.ibm.com>
PR tree-opt/18607
* tree-vectorizer.c (vect_analyze_data_refs): Use temporary
variable for data_reference when looking for memtag.
2004-11-30 Jakub Jelinek <jakub@redhat.com>
* c-opts.c (check_deps_environment_vars): If spec != NULL, set

46
gcc/testsuite/gcc.dg/vect/vect-89.c Normal file
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@ -0,0 +1,46 @@
/* { dg-require-effective-target vect_int } */
#include <stdarg.h>
#include "tree-vect.h"
#define N 16
struct tmp_struct
{
int x;
int y[N];
};
int main1 ()
{
int i, *q;
struct tmp_struct tmp, *p;
p = &tmp;
q = p->y;
for (i = 0; i < N; i++)
{
*q++ = 5;
}
/* check results: */
for (i = 0; i < N; i++)
{
if (p->y[i] != 5)
{
abort ();
}
}
return 0;
}
int main (void)
{
check_vect ();
return main1 ();
}
/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */

8
gcc/tree-vectorizer.c
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@ -4899,7 +4899,7 @@ vect_analyze_data_refs (loop_vec_info loop_vinfo)
int nbbs = loop->num_nodes;
block_stmt_iterator si;
int j;
struct data_reference *dr;
struct data_reference *dr, *tmp_dr;
tree tag;
tree address_base;
bool base_aligned_p;
@ -5013,9 +5013,9 @@ vect_analyze_data_refs (loop_vec_info loop_vinfo)
switch (TREE_CODE (address_base))
{
case ARRAY_REF:
dr = analyze_array (stmt, TREE_OPERAND (symbl, 0),
DR_IS_READ(dr));
tag = vect_get_base_and_bit_offset (dr, DR_BASE_NAME (dr),
tmp_dr = analyze_array (stmt, TREE_OPERAND (symbl, 0),
DR_IS_READ (tmp_dr));
tag = vect_get_base_and_bit_offset (tmp_dr, DR_BASE_NAME (tmp_dr),
NULL_TREE, loop_vinfo, &offset, &base_aligned_p);
if (!tag)
{