[turbofan] Track floating-point registers live at function entry in instruction scheduler.

src/compiler/instruction-scheduler.h

 // Copyright 2015 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_SCHEDULER_H_
 #define V8_COMPILER_INSTRUCTION_SCHEDULER_H_
 
 #include "src/compiler/instruction.h"
 #include "src/zone-containers.h"
 
@@ skipping 162 matching lines @@
   bool IsLoadOperation(const Instruction* instr) const {
     return GetInstructionFlags(instr) & kIsLoadOperation;
   }
 
   // Identify nops used as a definition point for live-in registers at
   // function entry.
   bool IsFixedRegisterParameter(const Instruction* instr) const {
     return (instr->arch_opcode() == kArchNop) &&
       (instr->OutputCount() == 1) &&
       (instr->OutputAt(0)->IsUnallocated()) &&
-      UnallocatedOperand::cast(instr->OutputAt(0))->HasFixedRegisterPolicy();
+      (UnallocatedOperand::cast(instr->OutputAt(0))->HasFixedRegisterPolicy() ||
+       UnallocatedOperand::cast(
+           instr->OutputAt(0))->HasFixedDoubleRegisterPolicy());
   }
 
   void ComputeTotalLatencies();
 
   static int GetInstructionLatency(const Instruction* instr);
 
   Zone* zone() { return zone_; }
   InstructionSequence* sequence() { return sequence_; }
   Isolate* isolate() { return sequence()->isolate(); }
 
@@ skipping 15 matching lines @@
   // All these nops are chained together and added as a predecessor of every
   // other instructions in the basic block.
   ScheduleGraphNode* last_live_in_reg_marker_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_SCHEDULER_H_