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[PATCH] Fix PR68517
- From: Richard Biener <rguenther at suse dot de>
- To: gcc-patches at gcc dot gnu dot org
- Date: Wed, 25 Nov 2015 10:20:57 +0100 (CET)
- Subject: [PATCH] Fix PR68517
- Authentication-results: sourceware.org; auth=none
Committed as obvious.
Richard.
2015-11-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/68517
* tree-vect-data-refs.c (vect_analyze_data_ref_accesses):
Properly handle zero-sized types.
* gcc.dg/torture/pr68517.c: New testcase.
Index: gcc/tree-vect-data-refs.c
===================================================================
--- gcc/tree-vect-data-refs.c (revision 230856)
+++ gcc/tree-vect-data-refs.c (working copy)
@@ -2769,7 +2769,8 @@ vect_analyze_data_ref_accesses (vec_info
/* If init_b == init_a + the size of the type * k, we have an
interleaving, and DRA is accessed before DRB. */
HOST_WIDE_INT type_size_a = tree_to_uhwi (sza);
- if ((init_b - init_a) % type_size_a != 0)
+ if (type_size_a == 0
+ || (init_b - init_a) % type_size_a != 0)
break;
/* If we have a store, the accesses are adjacent. This splits
Index: gcc/testsuite/gcc.dg/torture/pr68517.c
===================================================================
--- gcc/testsuite/gcc.dg/torture/pr68517.c (revision 0)
+++ gcc/testsuite/gcc.dg/torture/pr68517.c (working copy)
@@ -0,0 +1,26 @@
+/* { dg-do compile } */
+
+typedef struct
+{
+} st1;
+
+typedef struct
+{
+ volatile int c;
+} __attribute__ ((aligned (4))) st2;
+
+struct s4
+{
+ st1 f1;
+ st2 f2;
+ st1 f3;
+};
+
+struct s3;
+
+void
+foo (struct s3 *arg, struct s4 *arg1)
+{
+ arg1->f1 = (st1) { };
+ arg1->f3 = (st1) { };
+}