From: cuz <cuz@b7a2c559-68d2-44c3-8de9-860c34a00d81>
Date: Thu, 5 Dec 2002 12:59:07 +0000 (+0000)
Subject: Fixed a bug
X-Git-Tag: V2.12.0~1938
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=e4d25caa56def564136e52140fb9bbd64809234a;p=cc65

Fixed a bug


git-svn-id: svn://svn.cc65.org/cc65/trunk@1717 b7a2c559-68d2-44c3-8de9-860c34a00d81
---

diff --git a/src/cc65/coptstop.c b/src/cc65/coptstop.c
index 2a479ed41..5a512cb20 100644
--- a/src/cc65/coptstop.c
+++ b/src/cc65/coptstop.c
@@ -711,8 +711,16 @@ unsigned OptStackOps (CodeSeg* S)
 	/* Handling depends if we're inside a sequence or not */
 	if (InSeq) {
 
-       	    if (((E->Use & REG_SP) != 0 &&
-		 (E->AM != AM65_ZP_INDY || RegValIsUnknown (E->RI->In.RegY)))) {
+            /* If we are using the stack, and we don't have "indirect Y"
+             * addressing mode, or the value of Y is unknown, or less than
+             * two, we cannot cope with this piece of code. Having an unknown
+             * value of Y means that we cannot correct the stack offset, while
+             * having an offset less than two means that the code works with
+             * the value on stack which is to be removed.
+             */
+       	    if ((E->Use & REG_SP) != 0 &&
+	       	(E->AM != AM65_ZP_INDY || RegValIsUnknown (E->RI->In.RegY) ||
+                 E->RI->In.RegY < 2)) {
 
 	    	/* All this stuff is not allowed in a sequence */
 	    	InSeq = 0;