From: Paolo Bonzini <bonzini@gnu.org>
Date: Wed, 19 Oct 2005 10:49:56 +0000 (+0000)
Subject: re PR target/19672 (Performance regression in simple loop code)
X-Git-Tag: releases/gcc-3.4.5~136
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=447afba80f2083e939f388c3bfa755442197b78b;p=thirdparty%2Fgcc.git

re PR target/19672 (Performance regression in simple loop code)

2005-10-19  Paolo Bonzini  <bonzini@gnu.org>

	PR #19672
	* dojump.c (do_jump): Handle TRUTH_AND_EXPR and TRUTH_OR_EXPR
	like TRUTH_ANDIF_EXPR and TRUTH_ORIF_EXPR, if the branch cost
	is low enough.

From-SVN: r105608
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6ec42feb586a..a21864273bd1 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2005-10-19  Paolo Bonzini  <bonzini@gnu.org>
+
+	PR #19672
+	* dojump.c (do_jump): Handle TRUTH_AND_EXPR and TRUTH_OR_EXPR
+	like TRUTH_ANDIF_EXPR and TRUTH_ORIF_EXPR, if the branch cost
+	is low enough.
+
 2005-10-09  Eric Botcazou  <ebotcazou@libertysurf.fr>
 
 	* config/sparc/gmon-sol2.c (internal_mcount): Mark as used.
diff --git a/gcc/dojump.c b/gcc/dojump.c
index b232576d440e..be3df060027d 100644
--- a/gcc/dojump.c
+++ b/gcc/dojump.c
@@ -332,6 +332,12 @@ do_jump (tree exp, rtx if_false_label, rtx if_true_label)
       do_jump (TREE_OPERAND (exp, 0), if_true_label, if_false_label);
       break;
 
+    case TRUTH_AND_EXPR:
+      if (BRANCH_COST >= 4)
+        goto normal;
+
+      /* Else fall through to TRUTH_ANDIF_EXPR.  */
+
     case TRUTH_ANDIF_EXPR:
       if (if_false_label == 0)
         if_false_label = drop_through_label = gen_label_rtx ();
@@ -341,6 +347,12 @@ do_jump (tree exp, rtx if_false_label, rtx if_true_label)
       end_cleanup_deferral ();
       break;
 
+    case TRUTH_OR_EXPR:
+      if (BRANCH_COST >= 4)
+        goto normal;
+
+      /* Else fall through to TRUTH_ORIF_EXPR.  */
+
     case TRUTH_ORIF_EXPR:
       if (if_true_label == 0)
         if_true_label = drop_through_label = gen_label_rtx ();