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re PR middle-end/30442 (Expanded array initialization can use memset builtin function) 

2012-06-05  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/30442
	* tree-vect-data-refs.c (vect_analyze_data_refs): For basic-block
	vectorization stop analysis at the first stmt we cannot compute
	a data-reference for instead of giving up completely.

	* gcc.dg/vect/bb-slp-30.c: New testcase.

From-SVN: r188235
This commit is contained in:
Richard Guenther 2012-06-05 12:38:26 +00:00 committed by Richard Biener
parent 7ad672e46e
commit 1aedeafec2
4 changed files with 75 additions and 4 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2012-06-05 Richard Guenther <rguenther@suse.de>
PR tree-optimization/30442
* tree-vect-data-refs.c (vect_analyze_data_refs): For basic-block
vectorization stop analysis at the first stmt we cannot compute
a data-reference for instead of giving up completely.
2012-06-05 Richard Guenther <rguenther@suse.de>
* tree-loop-distribution.c (struct partition_s): Add has_writes

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2012-06-05 Richard Guenther <rguenther@suse.de>
PR tree-optimization/30442
* gcc.dg/vect/bb-slp-30.c: New testcase.
2012-06-05 Richard Guenther <rguenther@suse.de>
PR tree-optimization/53081

47
gcc/testsuite/gcc.dg/vect/bb-slp-30.c Normal file
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@ -0,0 +1,47 @@
/* { dg-require-effective-target vect_int } */
int a[32];
void __attribute__((noinline))
test1(void)
{
a[0] = 1;
a[1] = 1;
a[2] = 1;
a[3] = 1;
a[4] = 1;
a[5] = 1;
a[6] = 1;
a[7] = 1;
a[8] = 1;
a[9] = 1;
a[10] = 1;
a[11] = 1;
a[12] = 1;
a[13] = 1;
a[14] = 1;
a[15] = 1;
a[16] = 1;
a[17] = 1;
a[18] = 1;
a[19] = 1;
a[20] = 1;
a[21] = 1;
a[22] = 1;
a[23] = 1;
a[24] = 1;
a[25] = 1;
a[26] = 1;
a[27] = 1;
a[28] = 1;
a[29] = 1;
a[30] = 1;
a[31] = 1;
asm ("" : : : "memory");
a[21] = 0;
}
int main() { test1(); return a[21]; }
/* { dg-final { scan-tree-dump-times "basic block vectorized using SLP" 1 "slp" } } */
/* { dg-final { cleanup-tree-dump "slp" } } */

20
gcc/tree-vect-data-refs.c
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@ -2844,11 +2844,23 @@ vect_analyze_data_refs (loop_vec_info loop_vinfo,
}
else
{
gimple_stmt_iterator gsi;
bb = BB_VINFO_BB (bb_vinfo);
res = compute_data_dependences_for_bb (bb, true,
&BB_VINFO_DATAREFS (bb_vinfo),
&BB_VINFO_DDRS (bb_vinfo));
if (!res)
for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
{
gimple stmt = gsi_stmt (gsi);
if (!find_data_references_in_stmt (NULL, stmt,
&BB_VINFO_DATAREFS (bb_vinfo)))
{
/* Mark the rest of the basic-block as unvectorizable. */
for (; !gsi_end_p (gsi); gsi_next (&gsi))
STMT_VINFO_VECTORIZABLE (vinfo_for_stmt (stmt)) = false;
break;
}
}
if (!compute_all_dependences (BB_VINFO_DATAREFS (bb_vinfo),
&BB_VINFO_DDRS (bb_vinfo), NULL, true))
{
if (vect_print_dump_info (REPORT_UNVECTORIZED_LOCATIONS))
fprintf (vect_dump, "not vectorized: basic block contains function"