From: Richard Kenner <kenner@gcc.gnu.org>
Date: Tue, 7 Sep 1993 18:54:27 +0000 (-0400)
Subject: (expand_binop): Must always widen second operand of shift.
X-Git-Tag: misc/cutover-egcs-0~8667
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=943cc2426149ff3f490440e2cbae76a736613a48;p=thirdparty%2Fgcc.git

(expand_binop): Must always widen second operand of shift.

From-SVN: r5276
---

diff --git a/gcc/optabs.c b/gcc/optabs.c
index cc742a405182..801b9456aee2 100644
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -526,7 +526,12 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods)
 	      no_extend = 1;
 
 	    xop0 = widen_operand (xop0, wider_mode, unsignedp, no_extend);
-	    xop1 = widen_operand (xop1, wider_mode, unsignedp, no_extend);
+
+	    /* The second operand of a shift must always be extended.  */
+	    xop1 = widen_operand (xop1, wider_mode, unsignedp,
+				  no_extend && binoptab != ashl_optab
+				  && binoptab != lshl_optab);
+
 	    temp = expand_binop (wider_mode, binoptab, xop0, xop1, NULL_RTX,
 				 unsignedp, OPTAB_DIRECT);
 	    if (temp)
@@ -1419,7 +1424,11 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods)
 		no_extend = 1;
 
 	      xop0 = widen_operand (xop0, wider_mode, unsignedp, no_extend);
-	      xop1 = widen_operand (xop1, wider_mode, unsignedp, no_extend);
+
+	      /* The second operand of a shift must always be extended.  */
+	      xop1 = widen_operand (xop1, wider_mode, unsignedp,
+				    no_extend && binoptab != ashl_optab
+				    && binoptab != lshl_optab);
 
 	      temp = expand_binop (wider_mode, binoptab, xop0, xop1, NULL_RTX,
 				   unsignedp, methods);