cse.c (fold_rtx): Instantiate CONSTANT_P_RTX to 0 when not optimizing, even if flag_gcse is true.

	* cse.c (fold_rtx): Instantiate CONSTANT_P_RTX to 0 when not
	optimizing, even if flag_gcse is true.
	* toplev.c (rest_of_compilation): purge_builtin_constant_p
	only needs to be called when "optimize > 0 && flag_gcse".

From-SVN: r61785

1 files changed, 1 insertions, 1 deletions

diff --git a/gcc/cse.c b/gcc/cse.c
index 180c31e..e2a04e59 100644
--- a/gcc/cse.c
+++ b/gcc/cse.c
@@ -4338,7 +4338,7 @@ fold_rtx (x, insn)
 	{
 	  if (const_arg0)
 	    return const1_rtx;
-	  if (!flag_gcse)
+	  if (optimize == 0 || !flag_gcse)
 	    return const0_rtx;
 	}
       break;