Emit VMLS for multiply-subtract on ARM.

test/mjsunit/compiler/multiply-sub.js

Index: test/mjsunit/compiler/multiply-sub.js
diff --git a/test/mjsunit/compiler/regress-const.js b/test/mjsunit/compiler/multiply-sub.js
similarity index 72%
copy from test/mjsunit/compiler/regress-const.js
copy to test/mjsunit/compiler/multiply-sub.js
index aa55d0fd3ae17051a084a6bf28c2257f2abc8495..4793181d47a2b4a2b2390f5049758e651ef1ec1c 100644
--- a/test/mjsunit/compiler/regress-const.js
+++ b/test/mjsunit/compiler/multiply-sub.js
@@ -1,4 +1,4 @@
-// Copyright 2011 the V8 project authors. All rights reserved.
+// Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -26,43 +26,31 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --allow-natives-syntax
+// Test expressions that can be computed with a multiply-add instruction.
 
-// Test const initialization and assignments.
-function f() {
-  var x = 42;
-  while (true) {
-    const y = x;
-    if (--x == 0) return y;
-  }
+function f(a, b, c) {
+  return a - b * c;
 }
 
-function g() {
-  const x = 42;
-  x += 1;
-  return x;
+function g(a, b, c) {
+  return a * b - c;
 }
 
-for (var i = 0; i < 5; i++) {
-  f();
-  g();
+function h(a, b, c, d) {
+  return a * b - c * d;
 }
 
+assertEquals(-5.41, f(1.1, 2.1, 3.1));
+assertEquals(-5.41, f(1.1, 2.1, 3.1));
 %OptimizeFunctionOnNextCall(f);
-%OptimizeFunctionOnNextCall(g);
-
-assertEquals(42, f());
-assertEquals(42, g());
+assertEquals(-5.41, f(1.1, 2.1, 3.1));
 
+assertEquals(8.36, g(2.2, 3.3, -1.1));
+assertEquals(8.36, g(2.2, 3.3, -1.1));
+%OptimizeFunctionOnNextCall(g);
+assertEquals(8.36, g(2.2, 3.3, -1.1));
 
-function h(a, b) {
-  var r = a + b;
-  const X = 42;
-  return r + X;
-}
-
-for (var i = 0; i < 5; i++) h(1,2);
-
+assertEquals(-1.5, h(1.5, 3.0, 12, 0.5));
+assertEquals(-1.5, h(1.5, 3.0, 12, 0.5));
 %OptimizeFunctionOnNextCall(h);
-
-assertEquals(45, h(1,2));
-assertEquals("foo742", h("foo", 7));
+assertEquals(-1.5, h(1.5, 3.0, 12, 0.5));