[V8] Rename SIMD Create methods and add initialization operators.

src/wasm/function-body-decoder.cc

 // 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.
 
 #include "src/signature.h"
 
 #include "src/base/platform/elapsed-timer.h"
 #include "src/bit-vector.h"
 #include "src/flags.h"
 #include "src/handles.h"
@@ skipping 642 matching lines @@
     switch (type) {
       case kWasmI32:
         return builder_->Int32Constant(0);
       case kWasmI64:
         return builder_->Int64Constant(0);
       case kWasmF32:
         return builder_->Float32Constant(0);
       case kWasmF64:
         return builder_->Float64Constant(0);
       case kWasmS128:
-        return builder_->CreateS128Value(0);
+        return builder_->Simd128Zero();
+      case kWasmS1x4:
+        return builder_->Simd1x4Zero();
+      case kWasmS1x8:
+        return builder_->Simd1x8Zero();
+      case kWasmS1x16:
+        return builder_->Simd1x16Zero();
       default:
         UNREACHABLE();
         return nullptr;
     }
   }
 
   char* indentation() {
     static const int kMaxIndent = 64;
     static char bytes[kMaxIndent + 1];
     for (int i = 0; i < kMaxIndent; ++i) bytes[i] = ' ';
@@ skipping 1486 matching lines @@
 BitVector* AnalyzeLoopAssignmentForTesting(Zone* zone, size_t num_locals,
                                            const byte* start, const byte* end) {
   Decoder decoder(start, end);
   return WasmDecoder::AnalyzeLoopAssignment(&decoder, start,
                                             static_cast<int>(num_locals), zone);
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8