[ic] Introduce BOOLEAN state for CompareIC.

src/x64/code-stubs-x64.cc

Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index 59d3d6a58207465da8755270ba65f71269c460b2..af120df1edbaca14495c745fac4eff05109a69dc 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -3356,6 +3356,37 @@ void BinaryOpICWithAllocationSiteStub::Generate(MacroAssembler* masm) {
 }
 
 
+void CompareICStub::GenerateBooleans(MacroAssembler* masm) {
+  DCHECK_EQ(CompareICState::BOOLEAN, state());
+  Label miss;
+  Label::Distance const miss_distance =
+      masm->emit_debug_code() ? Label::kFar : Label::kNear;
+
+  __ JumpIfSmi(rdx, &miss, miss_distance);
+  __ movp(rcx, FieldOperand(rdx, HeapObject::kMapOffset));
+  __ JumpIfSmi(rax, &miss, miss_distance);
+  __ movp(rbx, FieldOperand(rax, HeapObject::kMapOffset));
+  __ JumpIfNotRoot(rcx, Heap::kBooleanMapRootIndex, &miss, miss_distance);
+  __ JumpIfNotRoot(rbx, Heap::kBooleanMapRootIndex, &miss, miss_distance);
+  if (op() != Token::EQ_STRICT && is_strong(strength())) {
+    __ TailCallRuntime(Runtime::kThrowStrongModeImplicitConversion, 0, 1);
+  } else {
+    if (!Token::IsEqualityOp(op())) {
+      __ movp(rax, FieldOperand(rax, Oddball::kToNumberOffset));
+      __ AssertSmi(rax);
+      __ movp(rdx, FieldOperand(rdx, Oddball::kToNumberOffset));
+      __ AssertSmi(rdx);
+      __ xchgp(rax, rdx);
+    }
+    __ subp(rax, rdx);
+    __ Ret();
+  }
+
+  __ bind(&miss);
+  GenerateMiss(masm);
+}
+
+
 void CompareICStub::GenerateSmis(MacroAssembler* masm) {
   DCHECK(state() == CompareICState::SMI);
   Label miss;