1 files changed, 2 insertions, 19 deletions
diff --git a/llvm/lib/Target/X86/X86InsertWait.cpp b/llvm/lib/Target/X86/X86InsertWait.cpp
index 56d2709f5937..69a3d32a9314 100644
--- a/llvm/lib/Target/X86/X86InsertWait.cpp
+++ b/llvm/lib/Target/X86/X86InsertWait.cpp
@@ -55,23 +55,6 @@ char WaitInsert::ID = 0;
 
 FunctionPass *llvm::createX86InsertX87waitPass() { return new WaitInsert(); }
 
-/// Return true if the Reg is X87 register.
-static bool isX87Reg(unsigned Reg) {
-  return (Reg == X86::FPCW || Reg == X86::FPSW ||
-          (Reg >= X86::ST0 && Reg <= X86::ST7));
-}
-
-/// check if the instruction is X87 instruction
-static bool isX87Instruction(MachineInstr &MI) {
-  for (const MachineOperand &MO : MI.operands()) {
-    if (!MO.isReg())
-      continue;
-    if (isX87Reg(MO.getReg()))
-      return true;
-  }
-  return false;
-}
-
 static bool isX87ControlInstruction(MachineInstr &MI) {
   switch (MI.getOpcode()) {
   case X86::FNINIT:
@@ -121,7 +104,7 @@ bool WaitInsert::runOnMachineFunction(MachineFunction &MF) {
   for (MachineBasicBlock &MBB : MF) {
     for (MachineBasicBlock::iterator MI = MBB.begin(); MI != MBB.end(); ++MI) {
       // Jump non X87 instruction.
-      if (!isX87Instruction(*MI))
+      if (!X86::isX87Instruction(*MI))
         continue;
       // If the instruction instruction neither has float exception nor is
       // a load/store instruction, or the instruction is x87 control
@@ -132,7 +115,7 @@ bool WaitInsert::runOnMachineFunction(MachineFunction &MF) {
       // If the following instruction is an X87 instruction and isn't an X87
       // non-waiting control instruction, we can omit insert wait instruction.
       MachineBasicBlock::iterator AfterMI = std::next(MI);
-      if (AfterMI != MBB.end() && isX87Instruction(*AfterMI) &&
+      if (AfterMI != MBB.end() && X86::isX87Instruction(*AfterMI) &&
           !isX87NonWaitingControlInstruction(*AfterMI))
         continue;