From 913b9f52e0450f17bdc73c813a13e9e9105c66b6 Mon Sep 17 00:00:00 2001
From: Bill Currie <bill@taniwha.org>
Date: Mon, 10 Jun 2019 18:13:28 +0900
Subject: [PATCH] Add an offset alias expression

This should make dealing with def elements (vector etc) easier.
---
 tools/qfcc/include/expr.h |  1 +
 tools/qfcc/source/expr.c  | 12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/tools/qfcc/include/expr.h b/tools/qfcc/include/expr.h
index 486af55be..5109b364e 100644
--- a/tools/qfcc/include/expr.h
+++ b/tools/qfcc/include/expr.h
@@ -558,6 +558,7 @@ expr_t *new_this_expr (void);
 expr_t *new_ret_expr (struct type_s *type);
 
 expr_t *new_alias_expr (struct type_s *type, expr_t *expr);
+expr_t *new_offset_alias_expr (struct type_s *type, expr_t *expr, int offset);
 
 /**	Create an expression of the correct type that references the specified
 	parameter slot.
diff --git a/tools/qfcc/source/expr.c b/tools/qfcc/source/expr.c
index aa530c04c..3353521b6 100644
--- a/tools/qfcc/source/expr.c
+++ b/tools/qfcc/source/expr.c
@@ -1025,6 +1025,18 @@ new_alias_expr (type_t *type, expr_t *expr)
 	return alias;
 }
 
+expr_t *
+new_offset_alias_expr (type_t *type, expr_t *expr, int offset)
+{
+	expr_t     *alias;
+
+	alias = new_binary_expr ('A', expr, new_integer_expr (offset));
+	alias->e.expr.type = type;
+	alias->file = expr->file;
+	alias->line = expr->line;
+	return alias;
+}
+
 static expr_t *
 param_expr (const char *name, type_t *type)
 {