[PATCH][TUPLES] Fix for Dead STMT in EH region seen during libstdc++-v3 build.

["=?big5?b?RG91ZyBLd2FuICjD9q62vHcp?=" <dougkwan at google dot com>]

Hi

    I am going to commit this two-line change after this mail.  The
old code in the tuples branch does not work because
maybe_clean_or_replace_eh_stmt uses the new GIMPLE statement to look
up the EH region from which we want to remove the old call statement.
Thus the call statement is not removed from its EH region even though
is it is removed after inline call expansion.

-Doug

2008-04-25  Doug Kwan  <dougkwan@google.com>

        * tree-inline.c (expand_call_inline):  Save old call statement
        and use it to look up correct EH region.

Index: gcc/gcc/tree-inline.c
===================================================================
--- gcc/gcc/tree-inline.c       (revision 134671)
+++ gcc/gcc/tree-inline.c       (working copy)
@@ -3242,6 +3242,7 @@ expand_call_inline (basic_block bb, gimp
      'a = foo (...)', substitute the call with 'a = USE_RETVAR'.  */
   if (use_retvar && gimple_call_lhs (stmt))
     {
+      gimple old_stmt = stmt;
       stmt = gimple_build_assign (gimple_call_lhs (stmt), use_retvar);
       gsi_replace (&stmt_gsi, stmt, false);
       if (gimple_in_ssa_p (cfun))
@@ -3249,7 +3250,7 @@ expand_call_inline (basic_block bb, gimp
           update_stmt (stmt);
           mark_symbols_for_renaming (stmt);
        }
-      maybe_clean_or_replace_eh_stmt (stmt, stmt);
+      maybe_clean_or_replace_eh_stmt (old_stmt, stmt);
     }
   else
     {