fold-const.c (fold_comparison): Strip nops inside POINTER_PLUS_EXPR.

2010-08-17  Richard Guenther  <rguenther@suse.de>

	* fold-const.c (fold_comparison): Strip nops inside
	POINTER_PLUS_EXPR.

From-SVN: r163298

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e6f43ed6d788589febc6457ae16720a5a58a3d5b..f46429ee208d2084b278830f7f08861dd746bda1 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2010-08-17  Richard Guenther  <rguenther@suse.de>
+
+       * fold-const.c (fold_comparison): Strip nops inside
+       POINTER_PLUS_EXPR.
+
 2010-08-17  Shujing Zhao  <pearly.zhao@oracle.com>
 
        PR c/40563

diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index d63411ea89aa708964fa72290600cb9332601c0d..02ddac57da44958594db558e6970c0d94178acdb 100644 (file)
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -8683,6 +8683,7 @@ fold_comparison (location_t loc, enum tree_code code, tree type,
       else if (TREE_CODE (arg0) == POINTER_PLUS_EXPR)
        {
          base0 = TREE_OPERAND (arg0, 0);
+         STRIP_SIGN_NOPS (base0);
          if (TREE_CODE (base0) == ADDR_EXPR)
            {
              base0 = TREE_OPERAND (base0, 0);
@@ -8705,6 +8706,7 @@ fold_comparison (location_t loc, enum tree_code code, tree type,
       else if (TREE_CODE (arg1) == POINTER_PLUS_EXPR)
        {
          base1 = TREE_OPERAND (arg1, 0);
+         STRIP_SIGN_NOPS (base1);
          if (TREE_CODE (base1) == ADDR_EXPR)
            {
              base1 = TREE_OPERAND (base1, 0);