Use AST's type field and merge types for unary, binary & compare ICs

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 1dac13d2b8f979fb30251032ccc0f91864c7d90c..b3ff90674badbf1341a230f13e3320bed6ed2dd7 100644
--- a/src/x64/lithium-codegen-x64.cc
+++ b/src/x64/lithium-codegen-x64.cc
@@ -1034,12 +1034,12 @@ void LCodeGen::DoModI(LModI* instr) {
     __ andl(left_reg, Immediate(divisor - 1));
     __ bind(&done);
 
-  } else if (hmod->has_fixed_right_arg()) {
+  } else if (hmod->fixed_right_arg().has_value) {
     Register left_reg = ToRegister(instr->left());
     ASSERT(left_reg.is(ToRegister(instr->result())));
     Register right_reg = ToRegister(instr->right());
 
-    int32_t divisor = hmod->fixed_right_arg_value();
+    int32_t divisor = hmod->fixed_right_arg().value;
     ASSERT(IsPowerOf2(divisor));
 
     // Check if our assumption of a fixed right operand still holds.