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[vtab (and trunk?)] find call before notes at the end of a BB


If a call is followed by notes at the end of a BB,
rtl_block_ends_with_call_p () returns false.  I think it should return
true, but I only need this for vtab ATM, so as to avoid scheduling
differences with or without -g -fvar-tracking-assignments.

Bootstrapped on x86_64-linux-gnu.  Ok to install?

for  gcc/ChangeLog
from  Alexandre Oliva  <aoliva@redhat.com>

	* cfgrtl.c (rtl_block_ends_with_call_p): Skip notes at the end.

Index: gcc/cfgrtl.c
===================================================================
--- gcc/cfgrtl.c.orig	2007-09-17 15:31:48.000000000 -0300
+++ gcc/cfgrtl.c	2007-09-17 15:34:01.000000000 -0300
@@ -2702,7 +2702,8 @@ rtl_block_ends_with_call_p (basic_block 
 
   while (!CALL_P (insn)
 	 && insn != BB_HEAD (bb)
-	 && keep_with_call_p (insn))
+	 && (keep_with_call_p (insn)
+	     || NOTE_P (insn)))
     insn = PREV_INSN (insn);
   return (CALL_P (insn));
 }
-- 
Alexandre Oliva         http://www.lsd.ic.unicamp.br/~oliva/
FSF Latin America Board Member         http://www.fsfla.org/
Red Hat Compiler Engineer   aoliva@{redhat.com, gcc.gnu.org}
Free Software Evangelist  oliva@{lsd.ic.unicamp.br, gnu.org}

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