ref: dc6135b7b6b30fb07d2ac661e56f23be8c12f8f7
parent: 49173c584d17208134df412148b84862843f5424
author: Ori Bernstein <[email protected]>
date: Tue Jan 7 09:03:31 EST 2014
Fold array lengths.
--- a/mi/fold.c
+++ b/mi/fold.c
@@ -53,6 +53,7 @@
Node *fold(Node *n, int foldvar)
{Node **args, *r;
+ Type *t;
vlong a, b;
size_t i;
@@ -140,6 +141,12 @@
case Obxor:
if (islit(args[0], &a) && islit(args[1], &b))
r = val(n->line, a ^ b, exprtype(n));
+ break;
+ case Omemb:
+ t = tybase(exprtype(args[0]));
+ /* we only fold lengths right now */
+ if (t->type == Tyarray && !strcmp(namestr(args[1]), "len"))
+ r = t->asize;
break;
case Ocast:
/* FIXME: we currentl assume that the bits of the