[wasm] Several unrelated cleanups

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"
@@ skipping 15 matching lines @@
   kLocalS1x8 = 0x79,
   kLocalS1x16 = 0x78
 };
 
 // Type code for multi-value block types.
 static const uint8_t kMultivalBlock = 0x41;
 
 // We reuse the internal machine type to represent WebAssembly types.
 // A typedef improves readability without adding a whole new type system.
 typedef MachineRepresentation ValueType;
-const ValueType kWasmStmt = MachineRepresentation::kNone;
-const ValueType kWasmI32 = MachineRepresentation::kWord32;
-const ValueType kWasmI64 = MachineRepresentation::kWord64;
-const ValueType kWasmF32 = MachineRepresentation::kFloat32;
-const ValueType kWasmF64 = MachineRepresentation::kFloat64;
-const ValueType kWasmS128 = MachineRepresentation::kSimd128;
-const ValueType kWasmS1x4 = MachineRepresentation::kSimd1x4;
-const ValueType kWasmS1x8 = MachineRepresentation::kSimd1x8;
-const ValueType kWasmS1x16 = MachineRepresentation::kSimd1x16;
-const ValueType kWasmVar = MachineRepresentation::kTagged;
+constexpr ValueType kWasmStmt = MachineRepresentation::kNone;
+constexpr ValueType kWasmI32 = MachineRepresentation::kWord32;
+constexpr ValueType kWasmI64 = MachineRepresentation::kWord64;
+constexpr ValueType kWasmF32 = MachineRepresentation::kFloat32;
+constexpr ValueType kWasmF64 = MachineRepresentation::kFloat64;
+constexpr ValueType kWasmS128 = MachineRepresentation::kSimd128;
+constexpr ValueType kWasmS1x4 = MachineRepresentation::kSimd1x4;
+constexpr ValueType kWasmS1x8 = MachineRepresentation::kSimd1x8;
+constexpr ValueType kWasmS1x16 = MachineRepresentation::kSimd1x16;
+constexpr ValueType kWasmVar = MachineRepresentation::kTagged;
 
 typedef Signature<ValueType> FunctionSig;
 std::ostream& operator<<(std::ostream& os, const FunctionSig& function);
 
 typedef Vector<const char> WasmName;
 
 typedef int WasmCodePosition;
-const WasmCodePosition kNoCodePosition = -1;
+constexpr WasmCodePosition kNoCodePosition = -1;
 
 // Control expressions and blocks.
 #define FOREACH_CONTROL_OPCODE(V)      \
   V(Unreachable, 0x00, _)              \
   V(Nop, 0x01, _)                      \
   V(Block, 0x02, _)                    \
   V(Loop, 0x03, _)                     \
   V(If, 0x004, _)                      \
   V(Else, 0x05, _)                     \
   V(Try, 0x06, _ /* eh_prototype */)   \
@@ skipping 646 matching lines @@
       default:
         return "<unknown>";
     }
   }
 };
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_OPCODES_H_