Implement inlining of constructor calls.

test/mjsunit/compiler/inline-construct.js

+// 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
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+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
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+//       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,
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+// 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 --inline-construct
+
+// Test inlining of constructor calls.
+
+function TestInlinedConstructor(closure) {
+  var result;
+  var counter = { value:0 };
+  result = closure(11, 12, counter);
+  assertEquals(23, result);
+  assertEquals(1, counter.value);
+  result = closure(23, 19, counter);
+  assertEquals(42, result);
+  assertEquals(2, counter.value);
+  %OptimizeFunctionOnNextCall(closure);
+  result = closure(1, 42, counter)
+  assertEquals(43, result);
+  assertEquals(3, counter.value);
+  result = closure("foo", "bar", counter)
+  assertEquals("foobar", result)
+  assertEquals(4, counter.value);
+}
+
+
+// Test constructor returning nothing in all contexts.
+function c1(a, b, counter) {
+  this.x = a + b;
+  counter.value++;
+}
+function c1_value_context(a, b, counter) {
+  var obj = new c1(a, b, counter);
+  return obj.x;
+}
+function c1_test_context(a, b, counter) {
+  if (!new c1(a, b, counter)) {
+    assertUnreachable("should not happen");
+  }
+  return a + b;
+}
+function c1_effect_context(a, b, counter) {
+  new c1(a, b, counter);
+  return a + b;
+}
+TestInlinedConstructor(c1_value_context);
+TestInlinedConstructor(c1_test_context);
+TestInlinedConstructor(c1_effect_context);
+
+
+// Test constructor returning an object in all contexts.
+function c2(a, b, counter) {
+  var obj = new Object();
+  obj.x = a + b;
+  counter.value++;
+  return obj;
+}
+function c2_value_context(a, b, counter) {
+  var obj = new c2(a, b, counter);
+  return obj.x;
+}
+function c2_test_context(a, b, counter) {
+  if (!new c2(a, b, counter)) {
+    assertUnreachable("should not happen");
+  }
+  return a + b;
+}
+function c2_effect_context(a, b, counter) {
+  new c2(a, b, counter);
+  return a + b;
+}
+TestInlinedConstructor(c2_value_context);
+TestInlinedConstructor(c2_test_context);
+TestInlinedConstructor(c2_effect_context);
+
+
+// Test constructor returning a primitive value in all contexts.
+function c3(a, b, counter) {
+  this.x = a + b;
+  counter.value++;
+  return "not an object";
+}
+function c3_value_context(a, b, counter) {
+  var obj = new c3(a, b, counter);
+  return obj.x;
+}
+function c3_test_context(a, b, counter) {
+  if (!new c3(a, b, counter)) {
+    assertUnreachable("should not happen");
+  }
+  return a + b;
+}
+function c3_effect_context(a, b, counter) {
+  new c3(a, b, counter);
+  return a + b;
+}
+TestInlinedConstructor(c3_value_context);
+TestInlinedConstructor(c3_test_context);
+TestInlinedConstructor(c3_effect_context);
+
+
+// Test constructor called with too many arguments.
+function c_too_many(a, b) {
+  this.x = a + b;
+}
+function f_too_many(a, b, c) {
+  var obj = new c_too_many(a, b, c);
+  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"))
+
+
+// Test constructor called with too few arguments.
+function c_too_few(a, b) {
+  assertSame(undefined, b);
+  this.x = a + 1;
+}
+function f_too_few(a) {
+  var obj = new c_too_few(a);
+  return obj.x;
+}
+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"))
+
+
+// Test constructor that cannot be inlined.
+function c_unsupported_syntax(a, b, counter) {
+  try {
+    this.x = a + b;
+    counter.value++;
+  } catch(e) {
+    throw new Error();
+  }
+}
+function f_unsupported_syntax(a, b, counter) {
+  var obj = new c_unsupported_syntax(a, b, counter);
+  return obj.x;
+}
+TestInlinedConstructor(f_unsupported_syntax);