* reg-stack.c (propagate_stack): Always copy the source stack to

[pf3gnuchains/gcc-fork.git] / gcc / ChangeLog

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@@ -1,3 +1,13 @@
+2005-05-29  Roger Sayle  <roger@eyesopen.com>
+
+       * reg-stack.c (propagate_stack): Always copy the source stack to
+       the destination.  This routine is now only called when this is safe.
+       (better_edge): New function split out from convert_regs_1 to
+       determine which of two edges is better to propagate across.
+       (convert_regs_1):  We need only search for a best edge if the
+       stack layout hasn't been defined yet.  Use better_edge to help
+       find beste.  No longer traverse unnecessary edges.
+
 2005-05-29  Keith Besaw  <kbesaw@us.ibm.com>
 
        * tree-ssa-alias.c (new_type_alias): New procedure to