[wasm] Int64Lowering of Int64Sub on ia32 and arm.

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 1136 matching lines @@
           CheckedLoadRepresentationOf(node->op()).representation();
       MarkAsRepresentation(rep, node);
       return VisitCheckedLoad(node);
     }
     case IrOpcode::kCheckedStore:
       return VisitCheckedStore(node);
     case IrOpcode::kInt32PairAdd:
       MarkAsWord32(NodeProperties::FindProjection(node, 0));
       MarkAsWord32(NodeProperties::FindProjection(node, 1));
       return VisitInt32PairAdd(node);
+    case IrOpcode::kInt32PairSub:
+      MarkAsWord32(NodeProperties::FindProjection(node, 0));
+      MarkAsWord32(NodeProperties::FindProjection(node, 1));
+      return VisitInt32PairSub(node);
     case IrOpcode::kWord32PairShl:
       MarkAsWord32(NodeProperties::FindProjection(node, 0));
       MarkAsWord32(NodeProperties::FindProjection(node, 1));
       return VisitWord32PairShl(node);
     case IrOpcode::kWord32PairShr:
       MarkAsWord32(NodeProperties::FindProjection(node, 0));
       MarkAsWord32(NodeProperties::FindProjection(node, 1));
       return VisitWord32PairShr(node);
     case IrOpcode::kWord32PairSar:
       MarkAsWord32(NodeProperties::FindProjection(node, 0));
@@ skipping 215 matching lines @@
   UNIMPLEMENTED();
 }
 
 
 void InstructionSelector::VisitBitcastInt64ToFloat64(Node* node) {
   UNIMPLEMENTED();
 }
 
 #endif  // V8_TARGET_ARCH_32_BIT
 
-// 32 bit targets do not implement the following instructions.
+// 64 bit targets do not implement the following instructions.
 #if V8_TARGET_ARCH_64_BIT
 void InstructionSelector::VisitInt32PairAdd(Node* node) { UNIMPLEMENTED(); }
 
+void InstructionSelector::VisitInt32PairSub(Node* node) { UNIMPLEMENTED(); }
+
 void InstructionSelector::VisitWord32PairShl(Node* node) { UNIMPLEMENTED(); }
 
 void InstructionSelector::VisitWord32PairShr(Node* node) { UNIMPLEMENTED(); }
 
 void InstructionSelector::VisitWord32PairSar(Node* node) { UNIMPLEMENTED(); }
 #endif  // V8_TARGET_ARCH_64_BIT
 
 void InstructionSelector::VisitFinishRegion(Node* node) {
   OperandGenerator g(this);
   Node* value = node->InputAt(0);
@@ skipping 65 matching lines @@
   switch (value->opcode()) {
     case IrOpcode::kInt32AddWithOverflow:
     case IrOpcode::kInt32SubWithOverflow:
     case IrOpcode::kInt64AddWithOverflow:
     case IrOpcode::kInt64SubWithOverflow:
     case IrOpcode::kTryTruncateFloat32ToInt64:
     case IrOpcode::kTryTruncateFloat64ToInt64:
     case IrOpcode::kTryTruncateFloat32ToUint64:
     case IrOpcode::kTryTruncateFloat64ToUint64:
     case IrOpcode::kInt32PairAdd:
+    case IrOpcode::kInt32PairSub:
     case IrOpcode::kWord32PairShl:
     case IrOpcode::kWord32PairShr:
     case IrOpcode::kWord32PairSar:
       if (ProjectionIndexOf(node->op()) == 0u) {
         Emit(kArchNop, g.DefineSameAsFirst(node), g.Use(value));
       } else {
         DCHECK(ProjectionIndexOf(node->op()) == 1u);
         MarkAsUsed(value);
       }
       break;
@@ skipping 287 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