Implement inlining of constructor calls.

test/mjsunit/compiler/inline-construct.js

+// Copyright 2012 the V8 project authors. All rights reserved.
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+// modification, are permitted provided that the following conditions are
+// met:
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+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax --inline-construct
+
+// Test inlining of constructor calls.
+
+function c1(a, b) {
+  this.x = a + b;
+}
+
+function c2(a, b) {
+  var obj = new Object();
+  obj.y = a + b;
+  return obj;

[Vyacheslav Egorov (Chromium), 2012/02/13 15:01:39]

it might be also interesting to check non-object return value (e.g. number).

[Michael Starzinger, 2012/02/27 14:16:32]

Done.

+}
+
+function f1(a, b) {
+  var obj = new c1(a, b);

[Vyacheslav Egorov (Chromium), 2012/02/13 15:01:39]

please extend this test to test inlining in all three contexts of graph
construction (and deopt from them).

[Michael Starzinger, 2012/02/27 14:16:32]

Done.

+  return obj.x;
+}
+
+function f2(a, b) {
+  var obj = new c2(a, b);
+  return obj.y;
+}
+
+assertEquals(23, f1(11, 12));
+assertEquals(42, f1(23, 19));
+%OptimizeFunctionOnNextCall(f1);
+assertEquals(43, f1(1, 42));
+assertEquals("foobar", f1("foo", "bar"))
+
+assertEquals(23, f2(11, 12));
+assertEquals(42, f2(23, 19));
+%OptimizeFunctionOnNextCall(f2);
+assertEquals(43, f2(1, 42));
+assertEquals("foobar", f2("foo", "bar"))
+
+function c_too_many(a, b) {
+  this.x = a + b;
+}
+
+function c_too_few(a, b) {
+  assertSame(undefined, b);
+  this.x = a + 1;
+}
+
+function f_too_many(a, b, c) {
+  var obj = new c_too_many(a, b, c);
+  return obj.x;
+}
+
+function f_too_few(a) {
+  var obj = new c_too_few(a);
+  return obj.x;
+}
+
+assertEquals(23, f_too_many(11, 12, 1));
+assertEquals(42, f_too_many(23, 19, 1));
+%OptimizeFunctionOnNextCall(f_too_many);
+assertEquals(43, f_too_many(1, 42, 1));
+assertEquals("foobar", f_too_many("foo", "bar", "baz"))
+
+assertEquals(12, f_too_few(11));
+assertEquals(24, f_too_few(23));
+%OptimizeFunctionOnNextCall(f_too_few);
+assertEquals(2, f_too_few(1));
+assertEquals("foo1", f_too_few("foo"))