[turbofan] Introduce new operators Float32SubPreserveNan and Float64SubPreserveNan for wasm.

src/compiler/instruction-selector.cc

 // 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.
 
 #include "src/compiler/instruction-selector.h"
 
 #include <limits>
 
 #include "src/base/adapters.h"
 #include "src/compiler/instruction-selector-impl.h"
@@ skipping 1057 matching lines @@
     case IrOpcode::kBitcastFloat64ToInt64:
       return MarkAsWord64(node), VisitBitcastFloat64ToInt64(node);
     case IrOpcode::kBitcastInt32ToFloat32:
       return MarkAsFloat32(node), VisitBitcastInt32ToFloat32(node);
     case IrOpcode::kBitcastInt64ToFloat64:
       return MarkAsFloat64(node), VisitBitcastInt64ToFloat64(node);
     case IrOpcode::kFloat32Add:
       return MarkAsFloat32(node), VisitFloat32Add(node);
     case IrOpcode::kFloat32Sub:
       return MarkAsFloat32(node), VisitFloat32Sub(node);
+    case IrOpcode::kFloat32SubPreserveNan:
+      return MarkAsFloat32(node), VisitFloat32SubPreserveNan(node);
     case IrOpcode::kFloat32Mul:
       return MarkAsFloat32(node), VisitFloat32Mul(node);
     case IrOpcode::kFloat32Div:
       return MarkAsFloat32(node), VisitFloat32Div(node);
     case IrOpcode::kFloat32Min:
       return MarkAsFloat32(node), VisitFloat32Min(node);
     case IrOpcode::kFloat32Max:
       return MarkAsFloat32(node), VisitFloat32Max(node);
     case IrOpcode::kFloat32Abs:
       return MarkAsFloat32(node), VisitFloat32Abs(node);
     case IrOpcode::kFloat32Sqrt:
       return MarkAsFloat32(node), VisitFloat32Sqrt(node);
     case IrOpcode::kFloat32Equal:
       return VisitFloat32Equal(node);
     case IrOpcode::kFloat32LessThan:
       return VisitFloat32LessThan(node);
     case IrOpcode::kFloat32LessThanOrEqual:
       return VisitFloat32LessThanOrEqual(node);
     case IrOpcode::kFloat64Add:
       return MarkAsFloat64(node), VisitFloat64Add(node);
     case IrOpcode::kFloat64Sub:
       return MarkAsFloat64(node), VisitFloat64Sub(node);
+    case IrOpcode::kFloat64SubPreserveNan:
+      return MarkAsFloat64(node), VisitFloat64SubPreserveNan(node);
     case IrOpcode::kFloat64Mul:
       return MarkAsFloat64(node), VisitFloat64Mul(node);
     case IrOpcode::kFloat64Div:
       return MarkAsFloat64(node), VisitFloat64Div(node);
     case IrOpcode::kFloat64Mod:
       return MarkAsFloat64(node), VisitFloat64Mod(node);
     case IrOpcode::kFloat64Min:
       return MarkAsFloat64(node), VisitFloat64Min(node);
     case IrOpcode::kFloat64Max:
       return MarkAsFloat64(node), VisitFloat64Max(node);
@@ skipping 706 matching lines @@
   return new (instruction_zone()) FrameStateDescriptor(
       instruction_zone(), state_info.type(), state_info.bailout_id(),
       state_info.state_combine(), parameters, locals, stack,
       state_info.shared_info(), outer_state);
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8