From 67819a72c6ba39267effe8edfc1befddc3f3f2f9 Mon Sep 17 00:00:00 2001
From: Fangrui Song <i@maskray.me>
Date: Tue, 13 Dec 2022 09:06:36 +0000
Subject: [CodeGen] llvm::Optional => std::optional

---
 llvm/lib/CodeGen/ModuloSchedule.cpp | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

(limited to 'llvm/lib/CodeGen/ModuloSchedule.cpp')

diff --git a/llvm/lib/CodeGen/ModuloSchedule.cpp b/llvm/lib/CodeGen/ModuloSchedule.cpp
index 195fd45..20d2517 100644
--- a/llvm/lib/CodeGen/ModuloSchedule.cpp
+++ b/llvm/lib/CodeGen/ModuloSchedule.cpp
@@ -1281,7 +1281,7 @@ class KernelRewriter {
   // Insert a phi that carries LoopReg from the loop body and InitReg otherwise.
   // If InitReg is not given it is chosen arbitrarily. It will either be undef
   // or will be chosen so as to share another phi.
-  Register phi(Register LoopReg, Optional<Register> InitReg = {},
+  Register phi(Register LoopReg, std::optional<Register> InitReg = {},
                const TargetRegisterClass *RC = nullptr);
   // Create an undef register of the given register class.
   Register undef(const TargetRegisterClass *RC);
@@ -1389,7 +1389,7 @@ Register KernelRewriter::remapUse(Register Reg, MachineInstr &MI) {
 
   // First, dive through the phi chain to find the defaults for the generated
   // phis.
-  SmallVector<Optional<Register>, 4> Defaults;
+  SmallVector<std::optional<Register>, 4> Defaults;
   Register LoopReg = Reg;
   auto LoopProducer = Producer;
   while (LoopProducer->isPHI() && LoopProducer->getParent() == BB) {
@@ -1400,7 +1400,7 @@ Register KernelRewriter::remapUse(Register Reg, MachineInstr &MI) {
   }
   int LoopProducerStage = S.getStage(LoopProducer);
 
-  Optional<Register> IllegalPhiDefault;
+  std::optional<Register> IllegalPhiDefault;
 
   if (LoopProducerStage == -1) {
     // Do nothing.
@@ -1432,9 +1432,9 @@ Register KernelRewriter::remapUse(Register Reg, MachineInstr &MI) {
       // If we need more phis than we have defaults for, pad out with undefs for
       // the earliest phis, which are at the end of the defaults chain (the
       // chain is in reverse order).
-      Defaults.resize(Defaults.size() + StageDiff, Defaults.empty()
-                                                       ? Optional<Register>()
-                                                       : Defaults.back());
+      Defaults.resize(Defaults.size() + StageDiff,
+                      Defaults.empty() ? std::optional<Register>()
+                                       : Defaults.back());
     }
   }
 
@@ -1466,7 +1466,7 @@ Register KernelRewriter::remapUse(Register Reg, MachineInstr &MI) {
   return LoopReg;
 }
 
-Register KernelRewriter::phi(Register LoopReg, Optional<Register> InitReg,
+Register KernelRewriter::phi(Register LoopReg, std::optional<Register> InitReg,
                              const TargetRegisterClass *RC) {
   // If the init register is not undef, try and find an existing phi.
   if (InitReg) {
-- 
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