qbe

commit d84f5fcbb75dcf8f6ff1f12e7509d05598a4b561
parent f622efa05a3fbd4938d1fb09e692ae0785770bc1
Author: Quentin Carbonneaux <quentin@c9x.me>
Date:   Mon,  8 Apr 2019 11:52:44 +0200

make sure a spill slot is initialized

If an instruction does not have a result, the
variable `s` is not set. This could lead to a
bogus slot assignment.

Diffstat:
M
spill.c
 | 
1
+

1 file changed, 1 insertion(+), 0 deletions(-)
diff --git a/spill.c b/spill.c
@@ -404,6 +404,7 @@ spill(Fn *fn)
 				continue;
 			}
 			bszero(w);
+			s = -1;
 			if (!req(i->to, R)) {
 				assert(rtype(i->to) == RTmp);
 				t = i->to.val;