From: Kazu Hirata <kazu@cs.umass.edu>
Date: Wed, 2 Apr 2003 21:43:35 +0000 (+0000)
Subject: * config/h8300/h8300.md (a peephole2): Tighten the condition.
X-Git-Tag: releases/gcc-3.4.0~7513
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=8fc9a7ba7b2f94550dcc912b917d7429ea1f081f;p=thirdparty%2Fgcc.git

* config/h8300/h8300.md (a peephole2): Tighten the condition.

From-SVN: r65174
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d7f2b9556f80..bfbcc946dec3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2003-04-02  Kazu Hirata  <kazu@cs.umass.edu>
+
+	* config/h8300/h8300.md (a peephole2): Tighten the condition.
+
 2003-04-02  Richard Henderson  <rth@redhat.com>
 
 	* longlong.h (umul_ppmm) [alpha]: Use __builtin_alpha_umulh.
diff --git a/gcc/config/h8300/h8300.md b/gcc/config/h8300/h8300.md
index 4b545431b458..a4c76f97ba78 100644
--- a/gcc/config/h8300/h8300.md
+++ b/gcc/config/h8300/h8300.md
@@ -4308,7 +4308,16 @@
 		  gen_rtx_EQ (VOIDmode, cc0_rtx, const0_rtx));
    operands[5] = GEN_INT (exact_log2 (INTVAL (operands[1]) + 1));")
 
-;; Transform A <= 1 to (A & 0xfffffffe) == 0.
+;; Transform
+;;
+;;	cmp.l	#15,er0
+;;	bhi	.L1
+;;
+;; into
+;;
+;;	and	#240,r0l
+;;	mov.l	er0,er0
+;;	bne	.L1
 
 (define_peephole2
   [(set (cc0)
@@ -4321,8 +4330,7 @@
 		      (pc)))]
   "(TARGET_H8300H || TARGET_H8300S)
    && peep2_reg_dead_p (1, operands[0])
-   && (INTVAL (operands[1]) == 1
-       || INTVAL (operands[1]) == 3
+   && ((TARGET_H8300H && INTVAL (operands[1]) == 3)
        || INTVAL (operands[1]) == 7
        || INTVAL (operands[1]) == 15
        || INTVAL (operands[1]) == 31