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

This patch make sure that the nop instructions used to mark floating-point
arguments live range begin will not be moved by the scheduler.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1896933004

Cr-Commit-Position: refs/heads/master@{#35751}

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();