[turbofan] Simplified lowering - introduce the concept of UseInfo.

src/compiler/code-generator.cc

 // Copyright 2013 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/compiler/code-generator.h"
 
 #include "src/address-map.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/pipeline.h"
@@ skipping 614 matching lines @@
   } else if (op->IsDoubleRegister()) {
     DCHECK((type & (kRepFloat32 | kRepFloat64)) != 0);
     InstructionOperandConverter converter(this, instr);
     translation->StoreDoubleRegister(converter.ToDoubleRegister(op));
   } else if (op->IsImmediate()) {
     InstructionOperandConverter converter(this, instr);
     Constant constant = converter.ToConstant(op);
     Handle<Object> constant_object;
     switch (constant.type()) {
       case Constant::kInt32:
-        DCHECK(type == kMachInt32 || type == kMachUint32 || type == kRepBit);
+        DCHECK(type == kMachInt32 || type == kMachUint32 || type == kMachBool ||
+               type == kRepBit);
         constant_object =
             isolate()->factory()->NewNumberFromInt(constant.ToInt32());
         break;
       case Constant::kFloat32:
         DCHECK((type & (kRepFloat32 | kRepTagged)) != 0);
         constant_object = isolate()->factory()->NewNumber(constant.ToFloat32());
         break;
       case Constant::kFloat64:
         DCHECK((type & (kRepFloat64 | kRepTagged)) != 0);
         constant_object = isolate()->factory()->NewNumber(constant.ToFloat64());
@@ skipping 26 matching lines @@
     : frame_(gen->frame()), masm_(gen->masm()), next_(gen->ools_) {
   gen->ools_ = this;
 }
 
 
 OutOfLineCode::~OutOfLineCode() {}
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8