re PR inline-asm/79552 (Wrong code generation due to -fschedule-insns, with __restric...

2017-02-17  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/79552
	* tree-ssa-structalias.c (visit_loadstore): Properly verify
	default defs.

From-SVN: r245528

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 96ae59a..03f490f 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,11 @@
 2017-02-17  Richard Biener  <rguenther@suse.de>
 
+       PR tree-optimization/79552
+       * tree-ssa-structalias.c (visit_loadstore): Properly verify
+       default defs.
+
+2017-02-17  Richard Biener  <rguenther@suse.de>
+
        PR bootstrap/79567
        * genmatch.c (output_line_directive): Handle DIR_SEPARATOR_2.
 

diff --git a/gcc/tree-ssa-structalias.c b/gcc/tree-ssa-structalias.c
index 390d5bb..c043e5e 100644 (file)
--- a/gcc/tree-ssa-structalias.c
+++ b/gcc/tree-ssa-structalias.c
@@ -7296,9 +7296,15 @@ visit_loadstore (gimple *, tree base, tree ref, void *data)
       || TREE_CODE (base) == TARGET_MEM_REF)
     {
       tree ptr = TREE_OPERAND (base, 0);
-      if (TREE_CODE (ptr) == SSA_NAME
-         && ! SSA_NAME_IS_DEFAULT_DEF (ptr))
+      if (TREE_CODE (ptr) == SSA_NAME)
        {
+         /* For parameters, get at the points-to set for the actual parm
+            decl.  */
+         if (SSA_NAME_IS_DEFAULT_DEF (ptr)
+             && (TREE_CODE (SSA_NAME_VAR (ptr)) == PARM_DECL
+                 || TREE_CODE (SSA_NAME_VAR (ptr)) == RESULT_DECL))
+           ptr = SSA_NAME_VAR (ptr);
+
          /* We need to make sure 'ptr' doesn't include any of
             the restrict tags we added bases for in its points-to set.  */
          varinfo_t vi = lookup_vi_for_tree (ptr);