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

	* tree-ssa-alias.c (nonoverlapping_component_refs_for_decl_p): Rename
	to ..
	(nonoverlapping_component_refs_since_match_p): ... this one;
	handle also non-decl bases; return -1 if search gave up.
	(alias_stats): Rename nonoverlapping_component_refs_of_decl_p_may_alias,
	nonoverlapping_component_refs_of_decl_p_no_alias to
	nonoverlapping_component_refs_since_match_p_may_alias,
	nonoverlapping_component_refs_since_match_p_no_alias.
	(dump_alias_stats): Update dumping.
	(aliasing_matching_component_refs_p):  Break out from ...;
	dispatch to nonoverlapping_component_refs_for_decl_p
	and nonoverlapping_component_refs_since_match_p.
	(aliasing_component_refs_p): ... here; call
	nonoverlapping_component_refs_p in scenarios where we can not
	precisely determine base match.
	(decl_refs_may_alias_p): Use
	nonoverlapping_component_refs_since_match_p.
	(indirect_ref_may_alias_decl_p): Do not call
	nonoverlapping_component_refs_p.
	(indirect_refs_may_alias_p): Likewise.

	* gcc.dg/tree-ssa/alias-access-path-7.c: New testcase.

From-SVN: r272926

gcc/ChangeLog

 2019-07-02  Jan Hubicka  <jh@suse.cz>
 
+	* tree-ssa-alias.c (nonoverlapping_component_refs_for_decl_p): Rename
+	to ..
+	(nonoverlapping_component_refs_since_match_p): ... this one;
+	handle also non-decl bases; return -1 if search gave up.
+	(alias_stats): Rename nonoverlapping_component_refs_of_decl_p_may_alias,
+	nonoverlapping_component_refs_of_decl_p_no_alias to
+	nonoverlapping_component_refs_since_match_p_may_alias,
+	nonoverlapping_component_refs_since_match_p_no_alias.
+	(dump_alias_stats): Update dumping.
+	(aliasing_matching_component_refs_p):  Break out from ...;
+	dispatch to nonoverlapping_component_refs_for_decl_p
+	and nonoverlapping_component_refs_since_match_p.
+	(aliasing_component_refs_p): ... here; call
+	nonoverlapping_component_refs_p in scenarios where we can not
+	precisely determine base match.
+	(decl_refs_may_alias_p): Use
+	nonoverlapping_component_refs_since_match_p.
+	(indirect_ref_may_alias_decl_p): Do not call
+	nonoverlapping_component_refs_p.
+	(indirect_refs_may_alias_p): Likewise.
+
+2019-07-02  Jan Hubicka  <jh@suse.cz>
+
 	* tree-inline.c (remap_gimple_stmt): Do not subtitute handled components
 	to clobber of return value.
 

gcc/testsuite/ChangeLog

 2019-07-02  Jan Hubicka  <jh@suse.cz>
 
+	* gcc.dg/tree-ssa/alias-access-path-7.c: New testcase.
+
+2019-07-02  Jan Hubicka  <jh@suse.cz>
+
 	* g++.dg/lto/pr90990_0.C: New testcase.
 
 2019-07-02  Richard Biener  <rguenther@suse.de>

gcc/testsuite/gcc.dg/tree-ssa/alias-access-path-7.c

+/* { dg-do compile } */
+/* { dg-options "-O1 -fno-strict-aliasing -fdump-tree-optimized" } */
+
+struct S
+{
+  int i;
+  int j;
+};
+struct U
+{
+  struct S a[10];
+};
+int
+foo (struct U *u, int n, int i, int j)
+{
+  u->a[i].i = 123;
+  u->a[j].j = j;
+  return u->a[i].i;
+}
+/* { dg-final { scan-tree-dump-times "return 123" 1 "optimized"} } */