(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

(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
3bb5826a · Richard Kenner · d02089a5 · 3bb5826a
Commit 3bb5826a authored Oct 20, 1995 by Richard Kenner
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Showing with 5 additions and 3 deletions

gcc/expr.c
+5 -3

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--- 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 a sequence exists, we would have to scan every instruction
-	  if (exp_rtl == 0)
+	     in the sequence to see if it was safe.  This is probably not
-	    /* We don't know what this can modify.  */
+	     worthwhile.  */
+	  if (RTL_EXPR_SEQUENCE (exp))
 	    return 0;
+	  exp_rtl = RTL_EXPR_RTL (exp);
 	  break;
 	case WITH_CLEANUP_EXPR: