Revert runtime lowering of wasm SIMD ops

src/compiler/simd-lowering.cc

Index: src/compiler/simd-lowering.cc
diff --git a/src/compiler/simd-lowering.cc b/src/compiler/simd-lowering.cc
deleted file mode 100644
index 03bb91918dd6f8e4dc0e60622adddc833f8d7f2b..0000000000000000000000000000000000000000
--- a/src/compiler/simd-lowering.cc
+++ /dev/null
@@ -1,116 +0,0 @@
-// Copyright 2016 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/compiler/simd-lowering.h"
-
-namespace v8 {
-namespace internal {
-namespace compiler {
-
-SimdLowering::~SimdLowering() {}
-
-void SimdLowering::InitializeSignatures() {
-  // Initialize signatures for runtime calls
-  const int kReturnCount = 1;
-  const int kBinop = 2;
-  const int kSimd32x4 = 4;
-  const int kSimd16x8 = 8;
-  const int kSimd8x16 = 16;
-
-  ConversionSignature::Builder CreateInt32x4Builder(zone_, kReturnCount,
-                                                    kSimd32x4);
-  ConversionSignature::Builder CreateFloat32x4Builder(zone_, kReturnCount,
-                                                      kSimd32x4);
-  ConversionSignature::Builder CreateInt16x8Builder(zone_, kReturnCount,
-                                                    kSimd16x8);
-  ConversionSignature::Builder CreateInt8x16Builder(zone_, kReturnCount,
-                                                    kSimd8x16);
-  ConversionSignature::Builder ExtractLaneIntBuilder(zone_, kReturnCount,
-                                                     kBinop);
-  ConversionSignature::Builder ExtractLaneFloatBuilder(zone_, kReturnCount,
-                                                       kBinop);
-  ConversionSignature::Builder DefaultBuilder(zone_, kReturnCount, kSimd8x16);
-
-  // Initialize Signatures for create functions
-  for (int i = 0; i < kSimd32x4; i++) {
-    CreateInt32x4Builder.AddParam(Conversion::kInt32);
-    CreateFloat32x4Builder.AddParam(Conversion::kFloat32);
-  }
-  CreateInt32x4Builder.AddReturn(Conversion::kOpaque);
-  SigCreateInt32x4 = CreateInt32x4Builder.Build();
-
-  CreateFloat32x4Builder.AddReturn(Conversion::kOpaque);
-  SigCreateFloat32x4 = CreateFloat32x4Builder.Build();
-
-  for (int i = 0; i < kSimd16x8; i++) {
-    CreateInt16x8Builder.AddParam(Conversion::kInt32);
-  }
-  CreateInt16x8Builder.AddReturn(Conversion::kOpaque);
-  SigCreateInt16x8 = CreateInt16x8Builder.Build();
-
-  for (int i = 0; i < kSimd8x16; i++) {
-    CreateInt8x16Builder.AddParam(Conversion::kInt32);
-  }
-  CreateInt8x16Builder.AddReturn(Conversion::kOpaque);
-  SigCreateInt8x16 = CreateInt8x16Builder.Build();
-
-  // Initialize signatures for ExtractLane functions
-  ExtractLaneIntBuilder.AddParam(Conversion::kOpaque);
-  ExtractLaneIntBuilder.AddParam(Conversion::kInt32);
-  ExtractLaneIntBuilder.AddReturn(Conversion::kInt32);
-  SigExtractLaneInt = ExtractLaneIntBuilder.Build();
-}
-
-Reduction SimdLowering::Reduce(Node* node) {
-  // For now lower everything to runtime calls.
-  switch (node->opcode()) {
-    case IrOpcode::kCreateInt32x4: {
-      return Replace(builder_->ChangeToRuntimeCall(
-          node, Runtime::kCreateInt32x4, SigCreateInt32x4));
-    }
-    case IrOpcode::kCreateInt16x8: {
-      return Replace(builder_->ChangeToRuntimeCall(
-          node, Runtime::kCreateInt16x8, SigCreateInt16x8));
-    }
-    case IrOpcode::kCreateInt8x16: {
-      return Replace(builder_->ChangeToRuntimeCall(
-          node, Runtime::kCreateInt8x16, SigCreateInt8x16));
-    }
-    case IrOpcode::kCreateFloat32x4: {
-      return Replace(builder_->ChangeToRuntimeCall(
-          node, Runtime::kCreateFloat32x4, SigCreateFloat32x4));
-    }
-    case IrOpcode::kInt8x16ExtractLane:
-    case IrOpcode::kInt16x8ExtractLane:
-    case IrOpcode::kInt32x4ExtractLane: {
-      return Replace(builder_->ChangeToRuntimeCall(
-          node, Runtime::kInt32x4ExtractLane, SigExtractLaneInt));
-    }
-    case IrOpcode::kFloat32x4ExtractLane: {
-      return Replace(builder_->ChangeToRuntimeCall(
-          node, Runtime::kFloat32x4ExtractLane, SigExtractLaneFloat));
-    }
-    default: { break; }
-  }
-
-  // TODO(gdeepti): Implement and test.
-  // Assume the others are all just simd in and out.
-  switch (node->opcode()) {
-#define F(Opcode)                                                             \
-  case IrOpcode::k##Opcode: {                                                 \
-    return Replace(                                                           \
-        builder_->ChangeToRuntimeCall(node, Runtime::k##Opcode, SigDefault)); \
-  }
-    MACHINE_SIMD_RETURN_SIMD_OP_LIST(F)
-    MACHINE_SIMD_RETURN_BOOL_OP_LIST(F)
-#undef F
-    default: { return NoChange(); }
-  }
-  UNREACHABLE();
-  return NoChange();
-}
-
-}  // namespace compiler
-}  // namespace internal
-}  // namespace v8