[turbofan] Spill rsi and rdi in their existing locations.

src/compiler/instruction-selector-impl.h

 // 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.
 
 #ifndef V8_COMPILER_INSTRUCTION_SELECTOR_IMPL_H_
 #define V8_COMPILER_INSTRUCTION_SELECTOR_IMPL_H_
 
 #include "src/compiler/instruction.h"
 #include "src/compiler/instruction-selector.h"
 #include "src/compiler/linkage.h"
@@ skipping 54 matching lines @@
     int virtual_register = GetVReg(node);
     sequence()->AddConstant(virtual_register, ToConstant(node));
     return ConstantOperand(virtual_register);
   }
 
   InstructionOperand DefineAsLocation(Node* node, LinkageLocation location,
                                       MachineType type) {
     return Define(node, ToUnallocatedOperand(location, type, GetVReg(node)));
   }
 
+  InstructionOperand DefineAsDualLocation(Node* node,
+                                          LinkageLocation primary_location,
+                                          LinkageLocation secondary_location) {
+    return Define(node,
+                  ToDualLocationUnallocatedOperand(
+                      primary_location, secondary_location, GetVReg(node)));
+  }
+
   InstructionOperand Use(Node* node) {
     return Use(node, UnallocatedOperand(UnallocatedOperand::NONE,
                                         UnallocatedOperand::USED_AT_START,
                                         GetVReg(node)));
   }
 
   InstructionOperand UseAny(Node* node) {
     return Use(node, UnallocatedOperand(UnallocatedOperand::ANY,
                                         UnallocatedOperand::USED_AT_START,
                                         GetVReg(node)));
@@ skipping 119 matching lines @@
     return operand;
   }
 
   UnallocatedOperand Use(Node* node, UnallocatedOperand operand) {
     DCHECK_NOT_NULL(node);
     DCHECK_EQ(operand.virtual_register(), GetVReg(node));
     selector()->MarkAsUsed(node);
     return operand;
   }
 
+  UnallocatedOperand ToDualLocationUnallocatedOperand(
+      LinkageLocation primary_location, LinkageLocation secondary_location,
+      int virtual_register) {
+    // We only support the primary location being a register and the secondary
+    // one a slot.
+    DCHECK(primary_location.IsRegister() &&
+           secondary_location.IsCalleeFrameSlot());
+    int reg_id = primary_location.AsRegister();
+    int slot_id = secondary_location.AsCalleeFrameSlot();
+    return UnallocatedOperand(reg_id, slot_id, virtual_register);
+  }
+
   UnallocatedOperand ToUnallocatedOperand(LinkageLocation location,
                                           MachineType type,
                                           int virtual_register) {
     if (location.IsAnyRegister()) {
       // any machine register.
       return UnallocatedOperand(UnallocatedOperand::MUST_HAVE_REGISTER,
                                 virtual_register);
     }
     if (location.IsCallerFrameSlot()) {
       // a location on the caller frame.
@@ skipping 97 matching lines @@
   Node* result_;             // Only valid if mode_ == kFlags_set.
   BasicBlock* true_block_;   // Only valid if mode_ == kFlags_branch.
   BasicBlock* false_block_;  // Only valid if mode_ == kFlags_branch.
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_SELECTOR_IMPL_H_