[PATCH] Fix the bug to check if lookup_stmt_eh_lp returns positive instead of non-zero

[Dehao Chen]

In lookup_stmt_eh_lp, negative return value indicates a MUST_NOT_THROW
region index. In this case, we should *not* add an EH edge during VPT.

Bootstrapped and passed regression test.

OK for trunk?

Thanks,
Dehao

gcc/ChangeLog:

2013-07-08  Dehao Chen (de...@google.com)

        * value-prof.c (gimple_ic): Fix the bug of adding EH edge.

Index: gcc/value-prof.c
===================================================================
--- gcc/value-prof.c (revision 200375)
+++ gcc/value-prof.c (working copy)
@@ -1359,8 +1359,7 @@ gimple_ic (gimple icall_stmt, struct cgraph_node *

   /* Build an EH edge for the direct call if necessary.  */
   lp_nr = lookup_stmt_eh_lp (icall_stmt);
-  if (lp_nr != 0
-      && stmt_could_throw_p (dcall_stmt))
+  if (lp_nr > 0 && stmt_could_throw_p (dcall_stmt))
     {
       edge e_eh, e;
       edge_iterator ei;