[turbofan] Make MachineType a pair of enums.

test/cctest/compiler/test-multiple-return.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 <cmath>
 #include <functional>
 #include <limits>
 
 #include "src/assembler.h"
 #include "src/base/bits.h"
@@ skipping 15 matching lines @@
 CallDescriptor* GetCallDescriptor(Zone* zone, int return_count,
                                   int param_count) {
   MachineSignature::Builder msig(zone, return_count, param_count);
   LocationSignature::Builder locations(zone, return_count, param_count);
   const RegisterConfiguration* config =
       RegisterConfiguration::ArchDefault(RegisterConfiguration::TURBOFAN);
 
   // Add return location(s).
   CHECK(return_count <= config->num_allocatable_general_registers());
   for (int i = 0; i < return_count; i++) {
-    msig.AddReturn(kMachInt32);
+    msig.AddReturn(MachineType::Int32());
     locations.AddReturn(
         LinkageLocation::ForRegister(config->allocatable_general_codes()[i]));
   }
 
   // Add register and/or stack parameter(s).
   CHECK(param_count <= config->num_allocatable_general_registers());
   for (int i = 0; i < param_count; i++) {
-    msig.AddParam(kMachInt32);
+    msig.AddParam(MachineType::Int32());
     locations.AddParam(
         LinkageLocation::ForRegister(config->allocatable_general_codes()[i]));
   }
 
   const RegList kCalleeSaveRegisters = 0;
   const RegList kCalleeSaveFPRegisters = 0;
 
   // The target for WASM calls is always a code object.
-  MachineType target_type = kMachAnyTagged;
+  MachineType target_type = MachineType::AnyTagged();
   LinkageLocation target_loc = LinkageLocation::ForAnyRegister();
   return new (zone) CallDescriptor(       // --
       CallDescriptor::kCallCodeObject,    // kind
       target_type,                        // target MachineType
       target_loc,                         // target location
       msig.Build(),                       // machine_sig
       locations.Build(),                  // location_sig
       0,                                  // js_parameter_count
       compiler::Operator::kNoProperties,  // properties
       kCalleeSaveRegisters,               // callee-saved registers
       kCalleeSaveFPRegisters,             // callee-saved fp regs
       CallDescriptor::kNoFlags,           // flags
       "c-call");
 }
 }  // namespace
 
 
 TEST(ReturnThreeValues) {
   Zone zone;
   CallDescriptor* desc = GetCallDescriptor(&zone, 3, 2);
   HandleAndZoneScope handles;
   RawMachineAssembler m(handles.main_isolate(),
                         new (handles.main_zone()) Graph(handles.main_zone()),
-                        desc, kMachPtr,
+                        desc, MachineType::PointerRepresentation(),
                         InstructionSelector::SupportedMachineOperatorFlags());
 
   Node* p0 = m.Parameter(0);
   Node* p1 = m.Parameter(1);
   Node* add = m.Int32Add(p0, p1);
   Node* sub = m.Int32Sub(p0, p1);
   Node* mul = m.Int32Mul(p0, p1);
   m.Return(add, sub, mul);
 
   CompilationInfo info("testing", handles.main_isolate(), handles.main_zone());
@@ skipping 21 matching lines @@
     OFStream os(stdout);
     code2->Disassemble("three_value_call", os);
   }
 #endif
   CHECK_EQ((123 + 456) + (123 - 456) + (123 * 456), mt.Call());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8