(safe_from_p, case RTL_EXPR): Return 0 if RTL_EXPR_SEQUENCE exists.

Delete code to return 0 if exp_rtl is zero.

From-SVN: r10492

diff --git a/gcc/expr.c b/gcc/expr.c
index 559a0677c87aa063bc43a1d37240e59d12aeb03f..567532dfde48b1837d650484956c16fba3622a9a 100644 (file)
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -3901,11 +3901,13 @@ safe_from_p (x, exp)
          break;
 
        case RTL_EXPR:
-         exp_rtl = RTL_EXPR_RTL (exp);
-         if (exp_rtl == 0)
-           /* We don't know what this can modify.  */
+         /* If a sequence exists, we would have to scan every instruction
+            in the sequence to see if it was safe.  This is probably not
+            worthwhile.  */
+         if (RTL_EXPR_SEQUENCE (exp))
            return 0;
 
+         exp_rtl = RTL_EXPR_RTL (exp);
          break;
 
        case WITH_CLEANUP_EXPR: