scc

commit cb8b536d8b84402c372f610efed3e1a6e852f65d
parent ad2d3ea7a4b95be09db3643e96b9e485e3296e81
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Wed, 29 Jul 2015 10:01:29 +0200

Add compile time calculation of constant ?:

Diffstat:
M
cc1/expr.c
 | 
12
++++++++++++

1 file changed, 12 insertions(+), 0 deletions(-)
diff --git a/cc1/expr.c b/cc1/expr.c
@@ -1065,6 +1065,18 @@ ternary(void)
 		expect(':');
 		ifno = promote(ternary());
 		typeconv(&ifyes, &ifno);
+		if (cond->constant) {
+			TINT i = cond->sym->u.i;
+
+			freetree(cond);
+			if (i == 0) {
+				freetree(ifyes);
+				return ifno;
+			} else {
+				freetree(ifno);
+				return ifyes;
+			}
+		}
 		np = node(OCOLON, ifyes->type, ifyes, ifno);
 		cond = node(OASK, np->type, cond, np);
 	}