[turbofan] JSTypedLowering can just look at the type hints.

src/compiler/js-typed-lowering.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/compilation-dependencies.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-typed-lowering.h"
 #include "src/compiler/linkage.h"
@@ skipping 10 matching lines @@
 // A helper class to simplify the process of reducing a single binop node with a
 // JSOperator. This class manages the rewriting of context, control, and effect
 // dependencies during lowering of a binop and contains numerous helper
 // functions for matching the types of inputs to an operation.
 class JSBinopReduction final {
  public:
   JSBinopReduction(JSTypedLowering* lowering, Node* node)
       : lowering_(lowering), node_(node) {}
 
   BinaryOperationHints::Hint GetNumberBinaryOperationFeedback() {
-    if (!(lowering_->flags() & JSTypedLowering::kDeoptimizationEnabled) ||
-        !(lowering_->flags() & JSTypedLowering::kTypeFeedbackEnabled)) {
-      return BinaryOperationHints::kAny;
-    }
-    DCHECK_NE(0, node_->op()->ControlOutputCount());
-    DCHECK_EQ(1, node_->op()->EffectOutputCount());
-    DCHECK_LE(1, OperatorProperties::GetFrameStateInputCount(node_->op()));
-    BinaryOperationHints hints = BinaryOperationHintsOf(node_->op());
-    BinaryOperationHints::Hint combined = hints.combined();
-    if (combined == BinaryOperationHints::kSignedSmall ||
-        combined == BinaryOperationHints::kSigned32 ||
-        combined == BinaryOperationHints::kNumberOrOddball) {
-      return combined;
+    if (lowering_->flags() & JSTypedLowering::kDeoptimizationEnabled) {
+      DCHECK_NE(0, node_->op()->ControlOutputCount());
+      DCHECK_EQ(1, node_->op()->EffectOutputCount());
+      DCHECK_LE(1, OperatorProperties::GetFrameStateInputCount(node_->op()));
+      BinaryOperationHints hints = BinaryOperationHintsOf(node_->op());
+      BinaryOperationHints::Hint combined = hints.combined();
+      if (combined == BinaryOperationHints::kSignedSmall ||
+          combined == BinaryOperationHints::kSigned32 ||
+          combined == BinaryOperationHints::kNumberOrOddball) {
+        return combined;
+      }
     }
     return BinaryOperationHints::kAny;
   }
 
   CompareOperationHints::Hint GetNumberCompareOperationFeedback() {
-    if (!(lowering_->flags() & JSTypedLowering::kDeoptimizationEnabled) ||
-        !(lowering_->flags() & JSTypedLowering::kTypeFeedbackEnabled)) {
-      return CompareOperationHints::kAny;
-    }
-    DCHECK_NE(0, node_->op()->ControlOutputCount());
-    DCHECK_EQ(1, node_->op()->EffectOutputCount());
-    DCHECK_EQ(1, OperatorProperties::GetFrameStateInputCount(node_->op()));
-    CompareOperationHints hints = CompareOperationHintsOf(node_->op());
-    CompareOperationHints::Hint combined = hints.combined();
-    if (combined == CompareOperationHints::kSignedSmall ||
-        combined == CompareOperationHints::kNumberOrOddball) {
-      return combined;
+    if (lowering_->flags() & JSTypedLowering::kDeoptimizationEnabled) {
+      DCHECK_NE(0, node_->op()->ControlOutputCount());
+      DCHECK_EQ(1, node_->op()->EffectOutputCount());
+      DCHECK_EQ(1, OperatorProperties::GetFrameStateInputCount(node_->op()));
+      CompareOperationHints hints = CompareOperationHintsOf(node_->op());
+      CompareOperationHints::Hint combined = hints.combined();
+      if (combined == CompareOperationHints::kSignedSmall ||
+          combined == CompareOperationHints::kNumberOrOddball) {
+        return combined;
+      }
     }
     return CompareOperationHints::kAny;
   }
 
   void ConvertInputsToNumber() {
     // To convert the inputs to numbers, we have to provide frame states
     // for lazy bailouts in the ToNumber conversions.
     // We use a little hack here: we take the frame state before the binary
     // operation and use it to construct the frame states for the conversion
     // so that after the deoptimization, the binary operation IC gets
@@ skipping 1988 matching lines @@
 }
 
 
 CompilationDependencies* JSTypedLowering::dependencies() const {
   return dependencies_;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8