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

src/compiler/instruction-scheduler.h

Index: src/compiler/instruction-scheduler.h
diff --git a/src/compiler/instruction-scheduler.h b/src/compiler/instruction-scheduler.h
index 104c0b97de8bd401d2a39c42d7bbfac81f38bec9..2208c401acaadbcb5a225262949d313e0abdebd6 100644
--- a/src/compiler/instruction-scheduler.h
+++ b/src/compiler/instruction-scheduler.h
@@ -180,7 +180,9 @@ class InstructionScheduler final : public ZoneObject {
     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();