From: spth <spth@4a8a32a2-be11-0410-ad9d-d568d2c75423>
Date: Sun, 3 Aug 2008 11:48:46 +0000 (+0000)
Subject: Added two peepholes that simplify conditional jumps
X-Git-Url: https://git.gag.com/?a=commitdiff_plain;h=0a04254e69623ab8772a291cac7e3a09fb7d7f7a;p=fw%2Fsdcc

Added two peepholes that simplify conditional jumps

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@5203 4a8a32a2-be11-0410-ad9d-d568d2c75423
---

diff --git a/src/z80/peeph-z80.def b/src/z80/peeph-z80.def
index 5af099d0..b34a6b0d 100644
--- a/src/z80/peeph-z80.def
+++ b/src/z80/peeph-z80.def
@@ -1267,7 +1267,27 @@ replace {
 	; peephole z13 removed unused ret.
 }
 
-// These two need two be here since the peephole optimizer continues to apply rules further down the file even for replace restart rules.
+// These four need two be here since the peephole optimizer continues to apply rules further down the file even for replace restart rules.
+replace restart {
+	jp	NC,%1
+	jp	%2
+%1:
+} by {
+	jp	C,%2
+	; peephole 5' removed jp by using inverse jump logic
+%1:
+} if labelRefCountChange(%1 -1)
+
+replace restart {
+	jp	C,%1
+	jp	%2
+%1:
+} by {
+	jp	NC,%2
+	; peephole 5' removed jp by using inverse jump logic
+%1:
+} if labelRefCountChange(%1 -1)
+
 replace restart {
 	jp	NZ,%1
 	jp	%2