From: Roger Sayle <roger@eyesopen.com>
Date: Mon, 16 Jun 2003 12:45:13 +0000 (+0000)
Subject: expr.c (expand_expr <PLUS_EXPR>): If operand_equal_p considers both operands of the... 
X-Git-Tag: releases/gcc-3.4.0~5787
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=c6547c920bd81449caa301b2256b85409d6d69fa;p=thirdparty%2Fgcc.git

expr.c (expand_expr <PLUS_EXPR>): If operand_equal_p considers both operands of the addition equal...


	* expr.c (expand_expr <PLUS_EXPR>): If operand_equal_p considers
	both operands of the addition equal, reuse the expanded RTL.
	(expand_expr <MULT_EXPR>): Likewise for multiplication.

From-SVN: r68012
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2501744a7380..85934ffc5a01 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2003-06-16  Roger Sayle  <roger@eyesopen.com>
+
+	* expr.c (expand_expr <PLUS_EXPR>): If operand_equal_p considers
+	both operands of the addition equal, reuse the expanded RTL.
+	(expand_expr <MULT_EXPR>): Likewise for multiplication.
+
 2003-06-16  Roger Sayle  <roger@eyesopen.com>
 	    Jeff Law  <law@redhat.com>
 
diff --git a/gcc/expr.c b/gcc/expr.c
index 3131a33e50d4..83240c682da7 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -8226,7 +8226,11 @@ expand_expr (exp, target, tmode, modifier)
 	  || mode != ptr_mode)
 	{
 	  op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0);
-	  op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0);
+	  if (! operand_equal_p (TREE_OPERAND (exp, 0),
+				 TREE_OPERAND (exp, 1), 0))
+	    op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0);
+	  else
+	    op1 = op0;
 	  if (op0 == const0_rtx)
 	    return op1;
 	  if (op1 == const0_rtx)
@@ -8235,7 +8239,12 @@ expand_expr (exp, target, tmode, modifier)
 	}
 
       op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, modifier);
-      op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, modifier);
+      if (! operand_equal_p (TREE_OPERAND (exp, 0),
+			     TREE_OPERAND (exp, 1), 0))
+	op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX,
+			   VOIDmode, modifier);
+      else
+	op1 = op0;
 
       /* We come here from MINUS_EXPR when the second operand is a
          constant.  */
@@ -8457,7 +8466,11 @@ expand_expr (exp, target, tmode, modifier)
 	    }
 	}
       op0 = expand_expr (TREE_OPERAND (exp, 0), subtarget, VOIDmode, 0);
-      op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0);
+      if (! operand_equal_p (TREE_OPERAND (exp, 0),
+			     TREE_OPERAND (exp, 1), 0))
+	op1 = expand_expr (TREE_OPERAND (exp, 1), NULL_RTX, VOIDmode, 0);
+      else
+	op1 = op0;
       return expand_mult (mode, op0, op1, target, unsignedp);
 
     case TRUNC_DIV_EXPR: