[wasm] Int64Lowering of I64ReinterpretF64.

src/compiler/int64-lowering.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/int64-lowering.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node-properties.h"
@@ skipping 426 matching lines @@
       Node* input = node->InputAt(0);
       if (HasReplacementLow(input)) {
         input = GetReplacementLow(input);
       }
       ReplaceNode(node, input, graph()->NewNode(common()->Int32Constant(0)));
       node->NullAllInputs();
       break;
     }
     // kExprF64ReinterpretI64:
     // kExprI64ReinterpretF64:
+    case IrOpcode::kBitcastFloat64ToInt64: {
+      DCHECK(node->InputCount() == 1);
+      Node* input = node->InputAt(0);
+      Node* stack_slot = graph()->NewNode(
+          machine()->StackSlot(MachineRepresentation::kWord64));
+      Node* store = graph()->NewNode(
+          machine()->Store(
+              StoreRepresentation(MachineRepresentation::kFloat64,
+                                  WriteBarrierKind::kNoWriteBarrier)),
+          stack_slot, graph()->NewNode(common()->Int32Constant(0)), input,
+          graph()->start(), graph()->start());
 
+      Node* high_node =
+          graph()->NewNode(machine()->Load(MachineType::Int32()), stack_slot,
+                           graph()->NewNode(common()->Int32Constant(4)), store,
+                           graph()->start());
+
+      Node* low_node =
+          graph()->NewNode(machine()->Load(MachineType::Int32()), stack_slot,
+                           graph()->NewNode(common()->Int32Constant(0)), store,
+                           graph()->start());
+      ReplaceNode(node, low_node, high_node);
+      break;
+    }
     // kExprI64Clz:
     // kExprI64Ctz:
     case IrOpcode::kWord64Popcnt: {
       DCHECK(node->InputCount() == 1);
       Node* input = node->InputAt(0);
       // We assume that a Word64Popcnt node only has been created if
       // Word32Popcnt is actually supported.
       DCHECK(machine()->Word32Popcnt().IsSupported());
       ReplaceNode(node, graph()->NewNode(
                             machine()->Int32Add(),
@@ skipping 67 matching lines @@
 }
 
 Node* Int64Lowering::GetReplacementHigh(Node* node) {
   Node* result = replacements_[node->id()].high;
   DCHECK(result);
   return result;
 }
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8