[turbofan] Desugar lookup slot optimization in graph builder.

test/unittests/compiler/js-typed-lowering-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/code-factory.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/js-typed-lowering.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 911 matching lines @@
                          receiver, vector, context, EmptyFrameState(),
                          EmptyFrameState(), effect, control));
     ASSERT_TRUE(r.Changed());
     EXPECT_THAT(r.replacement(), IsLoadField(AccessBuilder::ForStringLength(),
                                              receiver, effect, control));
   }
 }
 
 
 // -----------------------------------------------------------------------------
-// JSLoadDynamicGlobal
-
-
-TEST_F(JSTypedLoweringTest, JSLoadDynamicGlobal) {
-  Node* const context = Parameter(Type::Any());
-  Node* const vector = UndefinedConstant();
-  Node* const frame_state = EmptyFrameState();
-  Node* const effect = graph()->start();
-  Node* const control = graph()->start();
-  Handle<String> name = factory()->object_string();
-  VectorSlotPair feedback;
-  for (int i = 0; i < DynamicGlobalAccess::kMaxCheckDepth; ++i) {
-    uint32_t bitset = 1 << i;  // Only single check.
-    Reduction r = Reduce(graph()->NewNode(
-        javascript()->LoadDynamicGlobal(name, bitset, feedback,
-                                        NOT_INSIDE_TYPEOF),
-        vector, context, context, frame_state, frame_state, effect, control));
-    ASSERT_TRUE(r.Changed());
-    EXPECT_THAT(
-        r.replacement(),
-        IsPhi(kMachAnyTagged, _, _,
-              IsMerge(
-                  IsIfTrue(IsBranch(
-                      IsReferenceEqual(
-                          Type::Tagged(),
-                          IsLoadContext(
-                              ContextAccess(i, Context::EXTENSION_INDEX, false),
-                              context),
-                          IsNumberConstant(BitEq(0.0))),
-                      control)),
-                  _)));
-  }
-}
-
-
-// -----------------------------------------------------------------------------
-// JSLoadDynamicContext
-
-
-TEST_F(JSTypedLoweringTest, JSLoadDynamicContext) {
-  Node* const context = Parameter(Type::Any());
-  Node* const frame_state = EmptyFrameState();
-  Node* const effect = graph()->start();
-  Node* const control = graph()->start();
-  Handle<String> name = factory()->object_string();
-  for (int i = 0; i < DynamicContextAccess::kMaxCheckDepth; ++i) {
-    uint32_t bitset = 1 << i;  // Only single check.
-    Reduction r = Reduce(
-        graph()->NewNode(javascript()->LoadDynamicContext(name, bitset, 23, 42),
-                         context, context, frame_state, effect, control));
-    ASSERT_TRUE(r.Changed());
-    EXPECT_THAT(
-        r.replacement(),
-        IsPhi(kMachAnyTagged,
-              IsLoadContext(ContextAccess(23, 42, false), context), _,
-              IsMerge(
-                  IsIfTrue(IsBranch(
-                      IsReferenceEqual(
-                          Type::Tagged(),
-                          IsLoadContext(
-                              ContextAccess(i, Context::EXTENSION_INDEX, false),
-                              context),
-                          IsNumberConstant(BitEq(0.0))),
-                      control)),
-                  _)));
-  }
-}
-
-
-// -----------------------------------------------------------------------------
 // JSAdd
 
 
 TEST_F(JSTypedLoweringTest, JSAddWithString) {
   TRACED_FOREACH(LanguageMode, language_mode, kLanguageModes) {
     Node* lhs = Parameter(Type::String(), 0);
     Node* rhs = Parameter(Type::String(), 1);
     Node* context = Parameter(Type::Any(), 2);
     Node* frame_state0 = EmptyFrameState();
     Node* frame_state1 = EmptyFrameState();
@@ skipping 202 matching lines @@
   EXPECT_THAT(r.replacement(),
               IsFinishRegion(IsAllocate(IsNumberConstant(Context::SizeFor(
                                             Context::MIN_CONTEXT_SLOTS)),
                                         IsBeginRegion(effect), control),
                              _));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8