[turbofan] Introduce simplified operator NumberAbs.

test/unittests/compiler/js-builtin-reducer-unittest.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/js-builtin-reducer.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/simplified-operator.h"
 #include "src/compiler/typer.h"
 #include "src/isolate-inl.h"
@@ skipping 69 matching lines @@
 Type* const kNumberTypes[] = {
     Type::UnsignedSmall(), Type::Negative32(),  Type::Unsigned31(),
     Type::SignedSmall(),   Type::Signed32(),    Type::Unsigned32(),
     Type::Integral32(),    Type::MinusZero(),   Type::NaN(),
     Type::OrderedNumber(), Type::PlainNumber(), Type::Number()};
 
 }  // namespace
 
 
 // -----------------------------------------------------------------------------
+// Math.abs
+
+TEST_F(JSBuiltinReducerTest, MathAbsWithNumber) {
+  Node* function = MathFunction("abs");
+
+  Node* effect = graph()->start();
+  Node* control = graph()->start();
+  Node* context = UndefinedConstant();
+  Node* frame_state = graph()->start();
+  TRACED_FOREACH(Type*, t0, kNumberTypes) {
+    Node* p0 = Parameter(t0, 0);
+    Node* call = graph()->NewNode(javascript()->CallFunction(3), function,
+                                  UndefinedConstant(), p0, context, frame_state,
+                                  effect, control);
+    Reduction r = Reduce(call);
+
+    ASSERT_TRUE(r.Changed());
+    EXPECT_THAT(r.replacement(), IsNumberAbs(p0));
+  }
+}
+
+TEST_F(JSBuiltinReducerTest, MathAbsWithPlainPrimitive) {
+  Node* function = MathFunction("abs");
+
+  Node* effect = graph()->start();
+  Node* control = graph()->start();
+  Node* context = UndefinedConstant();
+  Node* frame_state = graph()->start();
+  Node* p0 = Parameter(Type::PlainPrimitive(), 0);
+  Node* call = graph()->NewNode(javascript()->CallFunction(3), function,
+                                UndefinedConstant(), p0, context, frame_state,
+                                effect, control);
+  Reduction r = Reduce(call);
+
+  ASSERT_TRUE(r.Changed());
+  EXPECT_THAT(r.replacement(), IsNumberAbs(IsPlainPrimitiveToNumber(p0)));
+}
+
+// -----------------------------------------------------------------------------
 // Math.atan
 
 TEST_F(JSBuiltinReducerTest, MathAtanWithNumber) {
   Node* function = MathFunction("atan");
 
   Node* effect = graph()->start();
   Node* control = graph()->start();
   Node* context = UndefinedConstant();
   Node* frame_state = graph()->start();
   TRACED_FOREACH(Type*, t0, kNumberTypes) {
@@ skipping 844 matching lines @@
   Reduction r = Reduce(call);
 
   ASSERT_TRUE(r.Changed());
   EXPECT_THAT(r.replacement(),
               IsStringFromCharCode(IsPlainPrimitiveToNumber(p0)));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8