From 065051cf1f5cea93db11c18357fd17d2c6ffa075 Mon Sep 17 00:00:00 2001
From: sandeep <sandeep@4a8a32a2-be11-0410-ad9d-d568d2c75423>
Date: Sun, 21 May 2000 04:40:01 +0000
Subject: [PATCH] some optimizations (eg. selective strength reduction)

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@255 4a8a32a2-be11-0410-ad9d-d568d2c75423
---
 src/SDCCloop.c      | 6 ++++++
 src/mcs51/peeph.def | 7 +++++++
 src/mcs51/ralloc.c  | 6 ++++--
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/SDCCloop.c b/src/SDCCloop.c
index 8eb38af3..e98192ad 100644
--- a/src/SDCCloop.c
+++ b/src/SDCCloop.c
@@ -872,6 +872,12 @@ set *basicInduction (region *loopReg , eBBlock **ebbs, int count)
 	    if (! applyToSetFTrue (basicInd,findInduction,aSym,&ip))
 		continue ;	    	    
 	    
+	    /* ask port for size not worth if native instruction
+	       exist for multiply & divide */
+	    if (getSize(operandType(IC_LEFT(ic))) <= port->muldiv.native_below ||
+		getSize(operandType(IC_RIGHT(ic))) <= port->muldiv.native_below)
+		continue;
+
 	    /* if this is a division then the remainder should be zero 
 	       for it to be inducted */
 	    if (ic->op == '/' && (ip->cval % litVal))
diff --git a/src/mcs51/peeph.def b/src/mcs51/peeph.def
index ef2963b9..630a6e6c 100644
--- a/src/mcs51/peeph.def
+++ b/src/mcs51/peeph.def
@@ -1786,4 +1786,11 @@ replace {
 	mov	(%1 + %2 + %3),((%2 + %1) + %3)
 } by {
 	; Peephole 221b remove redundant move
+}
+
+replace {
+	dec	r%1
+	inc	r%1
+} by {
+	; removed dec/inc pair
 }
\ No newline at end of file
diff --git a/src/mcs51/ralloc.c b/src/mcs51/ralloc.c
index 4440eb05..80d81667 100644
--- a/src/mcs51/ralloc.c
+++ b/src/mcs51/ralloc.c
@@ -1729,7 +1729,9 @@ static iCode *packRegsForOneuse (iCode *ic, operand *op , eBBlock *ebp)
        the usage of b, & acc */
     if (getSize(operandType(op)) >  (fReturnSize - 2) &&
 	ic->op != RETURN             &&
-	ic->op != SEND)
+	ic->op != SEND               &&
+	!POINTER_SET(ic)             &&
+	!POINTER_GET(ic))
 	return NULL;
 
     /* this routine will mark the a symbol as used in one 
@@ -1820,7 +1822,7 @@ static iCode *packRegsForOneuse (iCode *ic, operand *op , eBBlock *ebp)
 		return NULL;
 
 	/* if left or right or result is in far space */
-	if (isOperandInFarSpace(IC_LEFT(dic))   ||
+ 	if (isOperandInFarSpace(IC_LEFT(dic))   ||
 	    isOperandInFarSpace(IC_RIGHT(dic))  ||
 	    isOperandInFarSpace(IC_RESULT(dic)) ||
 	    IS_OP_RUONLY(IC_LEFT(dic))          ||
-- 
2.47.2