[wasm] Rename ast-decoder.* to function-body-decoder.*

src/wasm/wasm-opcodes.h

 // Copyright 2015 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_WASM_OPCODES_H_
 #define V8_WASM_OPCODES_H_
 
 #include "src/globals.h"
 #include "src/machine-type.h"
 #include "src/runtime/runtime.h"
 #include "src/signature.h"
 
 namespace v8 {
 namespace internal {
 namespace wasm {
 
 // Binary encoding of local types.
 enum LocalTypeCode {
   kLocalVoid = 0x40,
   kLocalI32 = 0x7f,
   kLocalI64 = 0x7e,
   kLocalF32 = 0x7d,
   kLocalF64 = 0x7c,
   kLocalS128 = 0x7b
 };
 
 // Type code for multi-value block types.
 static const uint8_t kMultivalBlock = 0x41;
 
-// We reuse the internal machine type to represent WebAssembly AST types.
+// We reuse the internal machine type to represent WebAssembly types.
 // A typedef improves readability without adding a whole new type system.
 typedef MachineRepresentation LocalType;
 const LocalType kAstStmt = MachineRepresentation::kNone;
 const LocalType kAstI32 = MachineRepresentation::kWord32;
 const LocalType kAstI64 = MachineRepresentation::kWord64;
 const LocalType kAstF32 = MachineRepresentation::kFloat32;
 const LocalType kAstF64 = MachineRepresentation::kFloat64;
 const LocalType kAstS128 = MachineRepresentation::kSimd128;
 // We use kTagged here because kNone is already used by kAstStmt.
 const LocalType kAstEnd = MachineRepresentation::kTagged;
@@ skipping 637 matching lines @@
       default:
         return "<unknown>";
     }
   }
 };
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_OPCODES_H_