testcase for mul_vf/fv

tests/mul_vf.qc

@@ -0,0 +1,17 @@
+void print(...) = #1;
+string vtos(vector) = #5;
+
+// getter to work around future -O
+vector get(vector v) {
+    return v;
+}
+
+void test(vector in) {
+    vector v = get(in);
+    vector b = v * v_x;
+    print(vtos(b), "\n");
+}
+
+void main() {
+    test('20 40 80');
+}

tests/mul_vf.tmpl

@@ -0,0 +1,5 @@
+I: mul_vf.qc
+D: mul-vf/fv liferanges
+T: -execute
+C: -std=fteqcc -Opeephole -Olocal-temps
+M: '400 800 1600'