Emit VMLA for multiply-add on ARM

test/mjsunit/compiler/multiply-add.js

-// Copyright 2011 the V8 project authors. All rights reserved.
+// Copyright 2012 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:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // 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, f(1, 2, 3));
+assertEquals(5, f(1, 2, 3));
 %OptimizeFunctionOnNextCall(f);
+assertEquals(5, f(1, 2, 3));
+assertEquals("2foo", f(1, 2, "foo"));
+assertEquals(5.41, f(1.1, 2.1, 3.1));
+assertEquals(5.41, f(1.1, 2.1, 3.1));
+%OptimizeFunctionOnNextCall(f);
+assertEquals(5.41, f(1.1, 2.1, 3.1));
+
+assertEquals(7, g(1, 2, 3));
+assertEquals(7, g(1, 2, 3));
 %OptimizeFunctionOnNextCall(g);
+assertEquals(7, g(1, 2, 3));
+assertEquals(8.36, g(1.1, 2.2, 3.3));
+assertEquals(8.36, g(1.1, 2.2, 3.3));
+%OptimizeFunctionOnNextCall(g);
+assertEquals(8.36, g(1.1, 2.2, 3.3));
 
-assertEquals(42, f());
-assertEquals(42, g());
-
-
-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(14, h(1, 2, 3, 4));
+assertEquals(14, h(1, 2, 3, 4));
 %OptimizeFunctionOnNextCall(h);
-
-assertEquals(45, h(1,2));
-assertEquals("foo742", h("foo", 7));
+assertEquals(14, h(1, 2, 3, 4));
+assertEquals(15.02, h(1.1, 2.1, 3.1, 4.1));
+assertEquals(15.02, h(1.1, 2.1, 3.1, 4.1));
+%OptimizeFunctionOnNextCall(h);
+assertEquals(15.02, h(1.1, 2.1, 3.1, 4.1));