Tue Apr 28 17:53:33 1998 Jim Wilson <wilson@cygnus.com>
+ * expr.c (expand_builtin, case BUILT_IN_MEMSET): Break if either
+ val or len has TREE_SIDE_EFFECTS set.
+
* sparc.md (mulsidi3): Call const v8plus and v8plus routines.
(mulsidi3_v8plus, const_mulsidi3_v8plus): Delete asterisk from name.
(smuldi3_highpart): Call const v8plus routine.
if (dest_align == 0)
break;
+ /* If the arguments have side-effects, then we can only evaluate
+ them at most once. The following code evaluates them twice if
+ they are not constants because we break out to expand_call
+ in that case. They can't be constants if they have side-effects
+ so we can check for that first. Alternatively, we could call
+ save_expr to make multiple evaluation safe. */
+ if (TREE_SIDE_EFFECTS (val) || TREE_SIDE_EFFECTS (len))
+ break;
+
/* If VAL is not 0, don't do this operation in-line. */
if (expand_expr (val, NULL_RTX, VOIDmode, 0) != const0_rtx)
break;