revert: fold-const.c (extract_muldiv_1): Remove bogus TYPE_IS_SIZETYPE special-casing.

2011-09-05  Richard Guenther  <rguenther@suse.de>

        Revert
        2011-08-31  Richard Guenther  <rguenther@suse.de>

	* fold-const.c (extract_muldiv_1): Remove bogus TYPE_IS_SIZETYPE
	special-casing.

From-SVN: r178523

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 336540426191d80fb1205c2d33a1278f4e763f53..b106227f2c4886ea961fcce4638e756b899318d8 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2011-09-04  Richard Guenther  <rguenther@suse.de>
+
+       Revert
+       2011-08-31  Richard Guenther  <rguenther@suse.de>
+
+       * fold-const.c (extract_muldiv_1): Remove bogus TYPE_IS_SIZETYPE
+       special-casing.
+
 2011-09-04  Iain Sandoe  <iains@gcc.gnu.org>
 
        PR debug/49901

diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index 0f4ca5e6222b6d367ea2ea13e421d4f492af013d..5807a5533ba208ae88b5282544068d3b0ed419d6 100644 (file)
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -5888,9 +5888,11 @@ extract_muldiv_1 (tree t, tree c, enum tree_code code, tree wide_type,
         multiple of the other, in which case we replace this with either an
         operation or CODE or TCODE.
 
-        If we have an unsigned type, we cannot do this since it will change
-        the result if the original computation overflowed.  */
-      if (TYPE_OVERFLOW_UNDEFINED (ctype)
+        If we have an unsigned type that is not a sizetype, we cannot do
+        this since it will change the result if the original computation
+        overflowed.  */
+      if ((TYPE_OVERFLOW_UNDEFINED (ctype)
+          || (TREE_CODE (ctype) == INTEGER_TYPE && TYPE_IS_SIZETYPE (ctype)))
          && ((code == MULT_EXPR && tcode == EXACT_DIV_EXPR)
              || (tcode == MULT_EXPR
                  && code != TRUNC_MOD_EXPR && code != CEIL_MOD_EXPR