qbe

commit e9ccf35b8a18b542603714c84fa2869b24a17af0
parent 7815610cd8af498beac01d3ae6a1c9b20f1f0a8d
Author: Quentin Carbonneaux <quentin.carbonneaux@yale.edu>
Date:   Thu, 29 Dec 2016 17:58:56 -0500

do not create useless mem refs

Diffstat:
M
isel.c
 | 
2
+-

1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/isel.c b/isel.c
@@ -162,7 +162,7 @@ seladdr(Ref *r, ANum *an, Fn *fn)
 	r0 = *r;
 	if (rtype(r0) == RTmp) {
 		amatch(&a, r0, an, fn, 1);
-		if (req(a.base, R))
+		if (req(a.base, R) || req(a.base, r0))
 			return;
 		chuse(r0, -1, fn);
 		vgrow(&fn->mem, ++fn->nmem);