From efdee3487007b4dfbca3af8ed7db6b8726658d1b Mon Sep 17 00:00:00 2001
From: cuz <cuz@b7a2c559-68d2-44c3-8de9-860c34a00d81>
Date: Sat, 22 Nov 2003 13:02:37 +0000
Subject: [PATCH] Mark RTI as "uses all registers" to avoid problems with the
 optimizer removing register loads from an interrupt handler return.

git-svn-id: svn://svn.cc65.org/cc65/trunk@2676 b7a2c559-68d2-44c3-8de9-860c34a00d81
---
 src/cc65/opcodes.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/cc65/opcodes.c b/src/cc65/opcodes.c
index 7bd8b5032..3ba541d01 100644
--- a/src/cc65/opcodes.c
+++ b/src/cc65/opcodes.c
@@ -449,11 +449,14 @@ const OPCDesc OPCTable[OPCODE_COUNT] = {
        	REG_NONE,     	                        /* use */
        	REG_NONE,     	                        /* chg */
 	OF_SETF	 		 		/* flags */
-    },
+    },         
+    /* Mark RTI as "uses all registers but doesn't change them", so the
+     * optimizer won't remove preceeding loads.
+     */
     {   OP65_RTI,      	                        /* opcode */
        	"rti", 	       	                        /* mnemonic */
        	1,     	       	                        /* size */
-       	REG_NONE,      	                        /* use */
+       	REG_AXY,      	                        /* use */
        	REG_NONE,      	                        /* chg */
 	OF_RET 			 		/* flags */
     },