tree-ssa-alias.c (nonoverlapping_component_refs_since_match_p): Rename to ...

	* tree-ssa-alias.c (nonoverlapping_component_refs_since_match_p):
	Rename to ...
	(nonoverlapping_refs_since_match_p): ... this; handle also
	ARRAY_REFs.
	(alias_stats): Update stats.
	(dump_alias_stats): Likewise.
	(cheap_array_ref_low_bound): New function.
	(aliasing_matching_component_refs_p): Add partial_overlap
	argument;
	pass it to nonoverlapping_refs_since_match_p.
	(aliasing_component_refs_walk): Update call of
	aliasing_matching_component_refs_p
	(nonoverlapping_array_refs_p): New function.
	(decl_refs_may_alias_p, indirect_ref_may_alias_decl_p,
	indirect_refs_may_alias_p): Update calls of
	nonoverlapping_refs_since_match_p.

	* gcc.dg/tree-ssa/alias-access-path-10.c: New testcase.
	* gcc.dg/tree-ssa/alias-access-path-11.c: New testcase.

From-SVN: r276427

gcc/ChangeLog

+2019-10-01  Jan Hubicka  <hubicka@ucw.cz>
+
+	* tree-ssa-alias.c (nonoverlapping_component_refs_since_match_p):
+	Rename to ...
+	(nonoverlapping_refs_since_match_p): ... this; handle also
+	ARRAY_REFs.
+	(alias_stats): Update stats.
+	(dump_alias_stats): Likewise.
+	(cheap_array_ref_low_bound): New function.
+	(aliasing_matching_component_refs_p): Add partial_overlap
+	argument;
+	pass it to nonoverlapping_refs_since_match_p.
+	(aliasing_component_refs_walk): Update call of
+	aliasing_matching_component_refs_p
+	(nonoverlapping_array_refs_p): New function.
+	(decl_refs_may_alias_p, indirect_ref_may_alias_decl_p,
+	indirect_refs_may_alias_p): Update calls of
+	nonoverlapping_refs_since_match_p.
+
 2019-10-01  Maya Rashish  <coypu@sdf.org>
 
 	PR target/85401

gcc/testsuite/ChangeLog

 2019-10-01  Jan Hubicka  <hubicka@ucw.cz>
 
+	* gcc.dg/tree-ssa/alias-access-path-10.c: New testcase.
+	* gcc.dg/tree-ssa/alias-access-path-11.c: New testcase.
+
+2019-10-01  Jan Hubicka  <hubicka@ucw.cz>
+
 	* g++.dg/lto/odr-6_0.C: New testcase.
 	* g++.dg/lto/odr-6_1.c: New testcase.
 

gcc/testsuite/gcc.dg/tree-ssa/alias-access-path-10.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-fre1" } */
+
+struct a {int array[3];} a[10];
+int
+test(int i,int j)
+{
+  a[i].array[1]=123;
+  a[j].array[2]=2;
+  return a[i].array[1];
+}
+/* { dg-final { scan-tree-dump-times "return 123" 1 "fre1"} } */

gcc/testsuite/gcc.dg/tree-ssa/alias-access-path-11.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-strict-aliasing -fdump-tree-fre3" } */
+typedef int outerarray[10][10][10];
+typedef int innerarray[10][10];
+outerarray *barptr;
+
+int
+test(int i,int j)
+{
+  innerarray *innerptr = (innerarray *)barptr;
+  (*barptr)[i][2][j]=10;;
+  (*innerptr)[3][j]=11;
+  return (*barptr)[i][2][j];
+}
+/* { dg-final { scan-tree-dump-times "return 10" 1 "fre3"} } */