Make HTypeofIsAndBranch accept any representation input

src/x64/lithium-codegen-x64.cc

Index: src/x64/lithium-codegen-x64.cc
diff --git a/src/x64/lithium-codegen-x64.cc b/src/x64/lithium-codegen-x64.cc
index 7c70094fbf03cda94da80d04a01e604d2b42d75e..340cd68e898efa071ca03185798f2d1c0870f813 100644
--- a/src/x64/lithium-codegen-x64.cc
+++ b/src/x64/lithium-codegen-x64.cc
@@ -5154,45 +5154,64 @@ void LCodeGen::EmitPushTaggedOperand(LOperand* operand) {
 
 
 void LCodeGen::DoTypeofIsAndBranch(LTypeofIsAndBranch* instr) {
-  Register input = ToRegister(instr->value());
+  Representation rep = instr->hydrogen()->value()->representation();
+  if (rep.IsSpecialization()) {
+    if (instr->hydrogen()->CheckNumberString()) {
+      EmitGoto(instr->TrueDestination(chunk_));
+    } else {
+      EmitGoto(instr->FalseDestination(chunk_));
+    }
+    return;
+  }
 
-  Condition final_branch_condition =
-      EmitTypeofIs(instr->TrueLabel(chunk_),
-          instr->FalseLabel(chunk_), input, instr->type_literal());
+  Register input = ToRegister(instr->value());
+  Condition final_branch_condition = EmitTypeofIs(instr, input);
   if (final_branch_condition != no_condition) {
     EmitBranch(instr, final_branch_condition);
   }
 }
 
 
-Condition LCodeGen::EmitTypeofIs(Label* true_label,
-                                 Label* false_label,
-                                 Register input,
-                                 Handle<String> type_name) {
+Condition LCodeGen::EmitTypeofIs(LTypeofIsAndBranch* instr, Register input) {
+  Label* true_label = instr->TrueLabel(chunk_);
+  Label* false_label = instr->FalseLabel(chunk_);
+  Handle<String> type_name = instr->type_literal();
+  int left_block = instr->TrueDestination(chunk_);
+  int right_block = instr->FalseDestination(chunk_);
+  int next_block = GetNextEmittedBlock();
+
+  Label::Distance true_distance = Label::kFar;
+  Label::Distance false_distance = Label::kFar;
+  if (left_block == next_block) {
+    true_distance = Label::kNear;
+  } else if (right_block == next_block) {
+    false_distance = Label::kNear;
+  }
+
   Condition final_branch_condition = no_condition;
   if (type_name->Equals(heap()->number_string())) {
-    __ JumpIfSmi(input, true_label);
+    __ JumpIfSmi(input, true_label, true_distance);
     __ CompareRoot(FieldOperand(input, HeapObject::kMapOffset),
                    Heap::kHeapNumberMapRootIndex);
 
     final_branch_condition = equal;
 
   } else if (type_name->Equals(heap()->string_string())) {
-    __ JumpIfSmi(input, false_label);
+    __ JumpIfSmi(input, false_label, false_distance);
     __ CmpObjectType(input, FIRST_NONSTRING_TYPE, input);
-    __ j(above_equal, false_label);
+    __ j(above_equal, false_label, false_distance);
     __ testb(FieldOperand(input, Map::kBitFieldOffset),
              Immediate(1 << Map::kIsUndetectable));
     final_branch_condition = zero;
 
   } else if (type_name->Equals(heap()->symbol_string())) {
-    __ JumpIfSmi(input, false_label);
+    __ JumpIfSmi(input, false_label, false_distance);
     __ CmpObjectType(input, SYMBOL_TYPE, input);
     final_branch_condition = equal;
 
   } else if (type_name->Equals(heap()->boolean_string())) {
     __ CompareRoot(input, Heap::kTrueValueRootIndex);
-    __ j(equal, true_label);
+    __ j(equal, true_label, true_distance);
     __ CompareRoot(input, Heap::kFalseValueRootIndex);
     final_branch_condition = equal;
 
@@ -5202,8 +5221,8 @@ Condition LCodeGen::EmitTypeofIs(Label* true_label,
 
   } else if (type_name->Equals(heap()->undefined_string())) {
     __ CompareRoot(input, Heap::kUndefinedValueRootIndex);
-    __ j(equal, true_label);
-    __ JumpIfSmi(input, false_label);
+    __ j(equal, true_label, true_distance);
+    __ JumpIfSmi(input, false_label, false_distance);
     // Check for undetectable objects => true.
     __ movq(input, FieldOperand(input, HeapObject::kMapOffset));
     __ testb(FieldOperand(input, Map::kBitFieldOffset),
@@ -5212,29 +5231,29 @@ Condition LCodeGen::EmitTypeofIs(Label* true_label,
 
   } else if (type_name->Equals(heap()->function_string())) {
     STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2);
-    __ JumpIfSmi(input, false_label);
+    __ JumpIfSmi(input, false_label, false_distance);
     __ CmpObjectType(input, JS_FUNCTION_TYPE, input);
-    __ j(equal, true_label);
+    __ j(equal, true_label, true_distance);
     __ CmpInstanceType(input, JS_FUNCTION_PROXY_TYPE);
     final_branch_condition = equal;
 
   } else if (type_name->Equals(heap()->object_string())) {
-    __ JumpIfSmi(input, false_label);
+    __ JumpIfSmi(input, false_label, false_distance);
     if (!FLAG_harmony_typeof) {
       __ CompareRoot(input, Heap::kNullValueRootIndex);
-      __ j(equal, true_label);
+      __ j(equal, true_label, true_distance);
     }
     __ CmpObjectType(input, FIRST_NONCALLABLE_SPEC_OBJECT_TYPE, input);
-    __ j(below, false_label);
+    __ j(below, false_label, false_distance);
     __ CmpInstanceType(input, LAST_NONCALLABLE_SPEC_OBJECT_TYPE);
-    __ j(above, false_label);
+    __ j(above, false_label, false_distance);
     // Check for undetectable objects => false.
     __ testb(FieldOperand(input, Map::kBitFieldOffset),
              Immediate(1 << Map::kIsUndetectable));
     final_branch_condition = zero;
 
   } else {
-    __ jmp(false_label);
+    __ jmp(false_label, false_distance);
   }
 
   return final_branch_condition;