tree-ssa-sccvn.c (ao_ref_init_from_vn_reference): Get original full reference tree...

2019-06-03  Richard Biener  <rguenther@suse.de>

	* tree-ssa-sccvn.c (ao_ref_init_from_vn_reference): Get original
	full reference tree and record in ref->ref.
	(vn_reference_lookup_3): Pass in original ref to
	ao_ref_init_from_vn_reference.
	(vn_reference_lookup): Likewise.
	* tree-ssa-sccvn.h (ao_ref_init_from_vn_reference): Adjust prototype.
	* tree-ssa-alias.c (nonoverlapping_component_refs_of_decl_p):
	Handle non-decl bases in the original reference.

	* gcc.dg/tree-ssa/alias-access-path-1.c: Scan fre1.

From-SVN: r271860

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6529d0e24a0c71c9b55bf19ec28c493725794d01..c68c2d9a625c27349de692bc84dc36cf4daa213d 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,14 @@
+2019-06-03  Richard Biener  <rguenther@suse.de>
+
+       * tree-ssa-sccvn.c (ao_ref_init_from_vn_reference): Get original
+       full reference tree and record in ref->ref.
+       (vn_reference_lookup_3): Pass in original ref to
+       ao_ref_init_from_vn_reference.
+       (vn_reference_lookup): Likewise.
+       * tree-ssa-sccvn.h (ao_ref_init_from_vn_reference): Adjust prototype.
+       * tree-ssa-alias.c (nonoverlapping_component_refs_of_decl_p):
+       Handle non-decl bases in the original reference.
+
 2019-06-03  Martin Liska  <mliska@suse.cz>
 
        * fold-const.c (operand_equal_p): Fix typo as compare_tree_int

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 75e38b8cf6a13cd225b699458a4f66c4c9700aa4..0621f68cb3898fc61aa26d1a86431b9d9c61da26 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2019-06-03  Richard Biener  <rguenther@suse.de>
+
+       * gcc.dg/tree-ssa/alias-access-path-1.c: Scan fre1.
+
 2019-06-03  Richard Biener  <rguenther@suse.de>
 
        PR tree-optimization/90716

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/alias-access-path-1.c b/gcc/testsuite/gcc.dg/tree-ssa/alias-access-path-1.c
index 264f72aff0a749768d26773de4f5448baae9b30d..63722a5d0fd2a7aec3f4a62e9b96cf308e858d5b 100644 (file)
--- a/gcc/testsuite/gcc.dg/tree-ssa/alias-access-path-1.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/alias-access-path-1.c
@@ -1,5 +1,6 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-fre3 -fno-tree-sra" } */
+/* { dg-options "-O2 -fdump-tree-fre1 -fno-tree-sra" } */
+
 struct foo
 {
   int val;
@@ -18,4 +19,4 @@ test ()
   return barptr->val2;
 }
 
-/* { dg-final { scan-tree-dump-times "return 123" 1 "fre3"} } */
+/* { dg-final { scan-tree-dump-times "return 123" 1 "fre1"} } */

diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c
index 429288b6ca523a7ed09267e651e3a35d8d53479f..dd4e3b7aaa9e5d58508a6c7c70a3b74dc6ddc1dc 100644 (file)
--- a/gcc/tree-ssa-alias.c
+++ b/gcc/tree-ssa-alias.c
@@ -1013,7 +1013,8 @@ nonoverlapping_component_refs_of_decl_p (tree ref1, tree ref2)
     }
   if (TREE_CODE (ref1) == MEM_REF)
     {
-      if (!integer_zerop (TREE_OPERAND (ref1, 1)))
+      if (!integer_zerop (TREE_OPERAND (ref1, 1))
+         || TREE_CODE (TREE_OPERAND (ref1, 0)) != ADDR_EXPR)
        return false;
       ref1 = TREE_OPERAND (TREE_OPERAND (ref1, 0), 0);
     }
@@ -1026,7 +1027,8 @@ nonoverlapping_component_refs_of_decl_p (tree ref1, tree ref2)
     }
   if (TREE_CODE (ref2) == MEM_REF)
     {
-      if (!integer_zerop (TREE_OPERAND (ref2, 1)))
+      if (!integer_zerop (TREE_OPERAND (ref2, 1))
+         || TREE_CODE (TREE_OPERAND (ref2, 0)) != ADDR_EXPR)
        return false;
       ref2 = TREE_OPERAND (TREE_OPERAND (ref2, 0), 0);
     }

diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c
index b4f626000dd01c759c4f11180c4029cd2a6910ff..8c0c8b2c56674bd43ccffbb1b00f1916d9b07db5 100644 (file)
--- a/gcc/tree-ssa-sccvn.c
+++ b/gcc/tree-ssa-sccvn.c
@@ -995,7 +995,7 @@ copy_reference_ops_from_ref (tree ref, vec<vn_reference_op_s> *result)
 bool
 ao_ref_init_from_vn_reference (ao_ref *ref,
                               alias_set_type set, tree type,
-                              vec<vn_reference_op_s> ops)
+                              vec<vn_reference_op_s> ops, tree orig_ref)
 {
   vn_reference_op_t op;
   unsigned i;
@@ -1149,7 +1149,7 @@ ao_ref_init_from_vn_reference (ao_ref *ref,
   if (base == NULL_TREE)
     return false;
 
-  ref->ref = NULL_TREE;
+  ref->ref = orig_ref;
   ref->base = base;
   ref->ref_alias_set = set;
   if (base_alias_set != -1)
@@ -1976,7 +1976,8 @@ vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *vr_,
        {
          lhs_ref_ok = ao_ref_init_from_vn_reference (&lhs_ref,
                                                      get_alias_set (lhs),
-                                                     TREE_TYPE (lhs), lhs_ops);
+                                                     TREE_TYPE (lhs), lhs_ops,
+                                                     lhs);
          if (lhs_ref_ok
              && !refs_may_alias_p_1 (ref, &lhs_ref, true))
            {
@@ -2718,7 +2719,7 @@ vn_reference_lookup (tree op, tree vuse, vn_lookup_kind kind,
          Otherwise preserve the full reference for advanced TBAA.  */
       if (!valuezied_anything
          || !ao_ref_init_from_vn_reference (&r, vr1.set, vr1.type,
-                                            vr1.operands))
+                                            vr1.operands, op))
        ao_ref_init (&r, op);
       if (! tbaa_p)
        r.ref_alias_set = r.base_alias_set = 0;

diff --git a/gcc/tree-ssa-sccvn.h b/gcc/tree-ssa-sccvn.h
index bd661bc651c43ce75ed0ca2604f1026a04cf99a5..ec32dcb499005997d11c3bff48c65375e001d381 100644 (file)
--- a/gcc/tree-ssa-sccvn.h
+++ b/gcc/tree-ssa-sccvn.h
@@ -229,7 +229,7 @@ vn_nary_op_t vn_nary_op_insert (tree, tree);
 vn_nary_op_t vn_nary_op_insert_pieces (unsigned int, enum tree_code,
                                       tree, tree *, tree, unsigned int);
 bool ao_ref_init_from_vn_reference (ao_ref *, alias_set_type, tree,
-                                   vec<vn_reference_op_s> );
+                                   vec<vn_reference_op_s>, tree = NULL_TREE);
 vec<vn_reference_op_s> vn_reference_operands_for_lookup (tree);
 tree vn_reference_lookup_pieces (tree, alias_set_type, tree,
                                 vec<vn_reference_op_s> ,