[PATCH] Do not allocate PRE value-ids in get_expr_value_id

[Richard Biener]

Still verifying some of my PRE assumtions by making the code less
obscure ...

Bootstrapped and tested on x86_64-unknown-linux-gnu, applied.

Richard.

2012-11-30  Richard Biener  <rguent...@suse.de>

        * tree-ssa-pre.c (get_expr_value_id): Do not allocate value-ids
        here.

Index: gcc/tree-ssa-pre.c
===================================================================
--- gcc/tree-ssa-pre.c  (revision 193990)
+++ gcc/tree-ssa-pre.c  (working copy)
@@ -616,7 +616,7 @@ get_expr_value_id (pre_expr expr)
   switch (expr->kind)
     {
     case CONSTANT:
-      id = get_or_alloc_constant_value_id (PRE_EXPR_CONSTANT (expr));
+      id = get_constant_value_id (PRE_EXPR_CONSTANT (expr));
       break;
     case NAME:
       id = VN_INFO (PRE_EXPR_NAME (expr))->value_id;