[turbofan] Sanitize the Truncation query method names.

src/compiler/representation-change.h

 // 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.
 
 #ifndef V8_COMPILER_REPRESENTATION_CHANGE_H_
 #define V8_COMPILER_REPRESENTATION_CHANGE_H_
 
 #include "src/compiler/js-graph.h"
 #include "src/compiler/simplified-operator.h"
 
@@ skipping 11 matching lines @@
   static Truncation Float32() { return Truncation(TruncationKind::kFloat32); }
   static Truncation Float64() { return Truncation(TruncationKind::kFloat64); }
   static Truncation Any() { return Truncation(TruncationKind::kAny); }
 
   static Truncation Generalize(Truncation t1, Truncation t2) {
     return Truncation(Generalize(t1.kind(), t2.kind()));
   }
 
   // Queries.
   bool IsUnused() const { return kind_ == TruncationKind::kNone; }
-  bool TruncatesToWord32() const {
+  bool IsUsedAsWord32() const {
     return LessGeneral(kind_, TruncationKind::kWord32);
   }
-  bool TruncatesToFloat64() const {
+  bool IsUsedAsFloat64() const {
     return LessGeneral(kind_, TruncationKind::kFloat64);
   }
-  bool TruncatesNaNToZero() {
+  bool IdentifiesNaNAndZero() {
     return LessGeneral(kind_, TruncationKind::kWord32) ||
            LessGeneral(kind_, TruncationKind::kBool);
   }
-  bool TruncatesUndefinedToZeroOrNaN() {
+  bool IdentifiesUndefinedAndNaNAndZero() {
     return LessGeneral(kind_, TruncationKind::kFloat64) ||
            LessGeneral(kind_, TruncationKind::kWord64);
   }
 
   // Operators.
   bool operator==(Truncation other) const { return kind() == other.kind(); }
   bool operator!=(Truncation other) const { return !(*this == other); }
 
   // Debug utilities.
   const char* description() const;
@@ skipping 190 matching lines @@
   Factory* factory() const { return isolate()->factory(); }
   SimplifiedOperatorBuilder* simplified() { return jsgraph()->simplified(); }
   MachineOperatorBuilder* machine() { return jsgraph()->machine(); }
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_REPRESENTATION_CHANGE_H_