qbe: Fix jnz controlled by short/char type

Although we don't need the cnew in this case, we still need to do
the appropriate extension to 32-bit.

1 files changed, 11 insertions, 0 deletions

diff --git a/test/if-char.qbe b/test/if-char.qbe
new file mode 100644
index 0000000..d964db4
--- /dev/null
+++ b/test/if-char.qbe
@@ -0,0 +1,11 @@
+export
+function w $main() {
+@start.1
+@body.2
+	%.1 =w extub 256
+	jnz %.1, @if_true.3, @if_false.4
+@if_true.3
+	ret 1
+@if_false.4
+	ret 0
+}