Fix va_arg ap_copy nop detection

2015-04-22  Tom de Vries  <tom@codesourcery.com>

	PR tree-optimization/65823
	* gimplify.c (gimplify_modify_expr): Use operand_equal_p to test for
	equality between ap_copy and ap.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@222318 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2e70a87..59eb8f8 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2015-04-22  Tom de Vries  <tom@codesourcery.com>
+
+       PR tree-optimization/65823
+       * gimplify.c (gimplify_modify_expr): Use operand_equal_p to test for
+       equality between ap_copy and ap.
+
 2015-04-22  Bernhard Reutner-Fischer  <aldot@gcc.gnu.org>
 
        PR target/47098

diff --git a/gcc/gimplify.c b/gcc/gimplify.c
index 0a8ef84..c68bd47 100644 (file)
--- a/gcc/gimplify.c
+++ b/gcc/gimplify.c
@@ -4792,7 +4792,7 @@ gimplify_modify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p,
   if (ap != NULL_TREE
       && TREE_CODE (ap) == ADDR_EXPR
       && TREE_CODE (ap_copy) == ADDR_EXPR
-      && TREE_OPERAND (ap, 0) != TREE_OPERAND (ap_copy, 0))
+      && !operand_equal_p (TREE_OPERAND (ap, 0), TREE_OPERAND (ap_copy, 0), 0))
     gimplify_assign (TREE_OPERAND (ap, 0), TREE_OPERAND (ap_copy, 0), pre_p);
 
   if (want_value)