From: cuz <cuz@b7a2c559-68d2-44c3-8de9-860c34a00d81>
Date: Fri, 11 Aug 2000 19:26:19 +0000 (+0000)
Subject: Don't create code for a subtraction of zero
X-Git-Tag: V2.12.0~3252
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=3b2f6679b5bfed330209ddf7a91d53d639f1fb5e;p=cc65

Don't create code for a subtraction of zero


git-svn-id: svn://svn.cc65.org/cc65/trunk@267 b7a2c559-68d2-44c3-8de9-860c34a00d81
---

diff --git a/src/cc65/codegen.c b/src/cc65/codegen.c
index 7fcb122f1..4a041b4e8 100644
--- a/src/cc65/codegen.c
+++ b/src/cc65/codegen.c
@@ -3191,6 +3191,11 @@ void g_inc (unsigned flags, unsigned long val)
 void g_dec (unsigned flags, unsigned long val)
 /* Decrement the primary register by a given number */
 {
+    /* Don't dec by zero */
+    if (val == 0) {
+     	return;
+    }
+
     /* Generate code for the supported types */
     flags &= ~CF_CONST;
     switch (flags & CF_TYPE) {