From: Roger Sayle <roger@eyesopen.com>
Date: Thu, 24 Jun 2004 20:38:59 +0000 (+0000)
Subject: re PR middle-end/15239 (suboptimal mult-by-const expansion cost limit)
X-Git-Tag: releases/gcc-4.0.0~7389
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=79066482014cb25e9743b44622fb304b6633b24b;p=thirdparty%2Fgcc.git

re PR middle-end/15239 (suboptimal mult-by-const expansion cost limit)


	PR middle-end/15239
	* expmed.c (expand_mult): Remove artificial restriction on the
	maximum cost of a synthetic multiplication sequence.

From-SVN: r83610
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a08ab3f5d6ab..d0c4473c01b3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2004-06-24  Roger Sayle  <roger@eyesopen.com>
+
+	PR middle-end/15239
+	* expmed.c (expand_mult): Remove artificial restriction on the
+	maximum cost of a synthetic multiplication sequence.
+
 2004-06-24  Eric Christopher  <echristo@redhat.com>
 
 	* combine.c (distribute_notes): Don't delete sets to
diff --git a/gcc/expmed.c b/gcc/expmed.c
index ae76695a133b..c86250364256 100644
--- a/gcc/expmed.c
+++ b/gcc/expmed.c
@@ -2664,7 +2664,6 @@ expand_mult (enum machine_mode mode, rtx op0, rtx op1, rtx target,
       && (unsignedp || !flag_trapv))
     {
       int mult_cost = rtx_cost (gen_rtx_MULT (mode, op0, op1), SET);
-      mult_cost = MIN (12 * add_cost[mode], mult_cost);
 
       if (choose_mult_variant (mode, INTVAL (const_op1), &algorithm, &variant,
 			       mult_cost))