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Don't create code for a subtraction of zero

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git-svn-id: svn://svn.cc65.org/cc65/trunk@267 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz
2000-08-11 19:26:19 +00:00
parent f1a54412b7
commit 3b2f6679b5
1 changed files with 5 additions and 0 deletions
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5
src/cc65/codegen.c
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@@ -3191,6 +3191,11 @@ void g_inc (unsigned flags, unsigned long val)
void g_dec (unsigned flags, unsigned long val) void g_dec (unsigned flags, unsigned long val)
/* Decrement the primary register by a given number */ /* Decrement the primary register by a given number */
{ {
/* Don't dec by zero */
if (val == 0) {
return;
}
/* Generate code for the supported types */ /* Generate code for the supported types */
flags &= ~CF_CONST; flags &= ~CF_CONST;
switch (flags & CF_TYPE) { switch (flags & CF_TYPE) {