Experimental: more code generator changes....

src/assembler-ia32.h

Index: src/assembler-ia32.h
===================================================================
--- src/assembler-ia32.h	(revision 949)
+++ src/assembler-ia32.h	(working copy)
@@ -174,6 +174,15 @@
 };
 
 
+// The result of negating a hint is as if the corresponding condition
+// were negated by NegateCondition.  That is, no_hint is mapped to
+// itself and not_taken and taken are mapped to each other.
+inline Hint NegateHint(Hint hint) {
+  return (hint == no_hint)
+      ? no_hint
+      : ((hint == not_taken) ? taken : not_taken);
+}
+
 // -----------------------------------------------------------------------------
 // Machine instruction Immediates