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diff gcc/tree-vrp.c @ 19:58ad6c70ea60

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update gcc from 4.4.0 to 4.4.1.
author kent@firefly.cr.ie.u-ryukyu.ac.jp
date Thu, 24 Sep 2009 13:21:57 +0900
parents a06113de4d67
children 77e2b8dfacca
line wrap: on
line diff
--- a/gcc/tree-vrp.c	Thu Sep 24 13:06:16 2009 +0900
+++ b/gcc/tree-vrp.c	Thu Sep 24 13:21:57 2009 +0900
@@ -5682,6 +5682,14 @@
   tree ret;
   bool only_ranges;
 
+  /* Some passes and foldings leak constants with overflow flag set
+     into the IL.  Avoid doing wrong things with these and bail out.  */
+  if ((TREE_CODE (op0) == INTEGER_CST
+       && TREE_OVERFLOW (op0))
+      || (TREE_CODE (op1) == INTEGER_CST
+	  && TREE_OVERFLOW (op1)))
+    return NULL_TREE;
+
   sop = false;
   ret = vrp_evaluate_conditional_warnv_with_ops (code, op0, op1, true, &sop,
   						 &only_ranges);