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

src/compiler/code-generator.cc

Index: src/compiler/code-generator.cc
diff --git a/src/compiler/code-generator.cc b/src/compiler/code-generator.cc
index 86be1c147907b94d73290120b9a13b778afa8d4c..656cabde4cdc87519b23713cdae9cceec68e101e 100644
--- a/src/compiler/code-generator.cc
+++ b/src/compiler/code-generator.cc
@@ -632,7 +632,7 @@ void CodeGenerator::AddTranslationForOperand(Translation* translation,
     Handle<Object> constant_object;
     switch (constant.type()) {
       case Constant::kInt32:
-        DCHECK(type == kMachInt32 || type == kMachUint32 || type == kRepBit);
+        DCHECK(type == kMachInt32 || type == kMachUint32 || type == kMachBool);
         constant_object =
             isolate()->factory()->NewNumberFromInt(constant.ToInt32());
         break;