From c4a2620e2925516929cccbe3be532561d282cde7 Mon Sep 17 00:00:00 2001
From: acqn <acqn163@outlook.com>
Date: Mon, 8 Feb 2021 22:47:51 +0800
Subject: [PATCH] Added an utility function to check for quasi-constant
 addresses (of stack variables).

---
 src/cc65/exprdesc.c | 9 +++++++++
 src/cc65/exprdesc.h | 5 +++++
 2 files changed, 14 insertions(+)

diff --git a/src/cc65/exprdesc.c b/src/cc65/exprdesc.c
index f5d8cd779..aa98e1531 100644
--- a/src/cc65/exprdesc.c
+++ b/src/cc65/exprdesc.c
@@ -408,6 +408,15 @@ int ED_IsConst (const ExprDesc* Expr)
 
 
 
+int ED_IsQuasiConst (const ExprDesc* Expr)
+/* Return true if the expression denotes a quasi-constant of some sort. This
+** can be a numeric constant, a constant address or a stack variable address.
+*/
+{
+    return (Expr->Flags & E_MASK_LOC) == E_LOC_NONE || ED_IsQuasiConstAddr (Expr);
+}
+
+
 int ED_IsConstAddr (const ExprDesc* Expr)
 /* Return true if the expression denotes a constant address of some sort. This
 ** can be the address of a global variable (maybe with offset) or similar.
diff --git a/src/cc65/exprdesc.h b/src/cc65/exprdesc.h
index e1bf3117f..844af1566 100644
--- a/src/cc65/exprdesc.h
+++ b/src/cc65/exprdesc.h
@@ -649,6 +649,11 @@ int ED_IsConst (const ExprDesc* Expr);
 ** similar.
 */
 
+int ED_IsQuasiConst (const ExprDesc* Expr);
+/* Return true if the expression denotes a quasi-constant of some sort. This
+** can be a numeric constant, a constant address or a stack variable address.
+*/
+
 int ED_IsConstAddr (const ExprDesc* Expr);
 /* Return true if the expression denotes a constant address of some sort. This
 ** can be the address of a global variable (maybe with offset) or similar.