From 044eb2f6afba375a914ac9d8024f8f5142bb912e Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Mon, 18 Dec 2017 20:10:56 +0000
Subject: Vendor import of llvm trunk r321017:
 https://llvm.org/svn/llvm-project/llvm/trunk@321017

---
 lib/CodeGen/OptimizePHIs.cpp | 29 +++++++++++++++++++----------
 1 file changed, 19 insertions(+), 10 deletions(-)

(limited to 'lib/CodeGen/OptimizePHIs.cpp')

diff --git a/lib/CodeGen/OptimizePHIs.cpp b/lib/CodeGen/OptimizePHIs.cpp
index f7aeb4204c5b..8972867ba083 100644
--- a/lib/CodeGen/OptimizePHIs.cpp
+++ b/lib/CodeGen/OptimizePHIs.cpp
@@ -1,4 +1,4 @@
-//===-- OptimizePHIs.cpp - Optimize machine instruction PHIs --------------===//
+//===- OptimizePHIs.cpp - Optimize machine instruction PHIs ---------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -14,13 +14,17 @@
 
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/Statistic.h"
+#include "llvm/CodeGen/MachineBasicBlock.h"
+#include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
 #include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/CodeGen/MachineOperand.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/Passes.h"
-#include "llvm/IR/Function.h"
-#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Target/TargetSubtargetInfo.h"
+#include "llvm/CodeGen/TargetRegisterInfo.h"
+#include "llvm/CodeGen/TargetSubtargetInfo.h"
+#include "llvm/Pass.h"
+#include <cassert>
+
 using namespace llvm;
 
 #define DEBUG_TYPE "opt-phis"
@@ -29,12 +33,14 @@ STATISTIC(NumPHICycles, "Number of PHI cycles replaced");
 STATISTIC(NumDeadPHICycles, "Number of dead PHI cycles");
 
 namespace {
+
   class OptimizePHIs : public MachineFunctionPass {
     MachineRegisterInfo *MRI;
     const TargetInstrInfo *TII;
 
   public:
     static char ID; // Pass identification
+
     OptimizePHIs() : MachineFunctionPass(ID) {
       initializeOptimizePHIsPass(*PassRegistry::getPassRegistry());
     }
@@ -47,23 +53,26 @@ namespace {
     }
 
   private:
-    typedef SmallPtrSet<MachineInstr*, 16> InstrSet;
-    typedef SmallPtrSetIterator<MachineInstr*> InstrSetIterator;
+    using InstrSet = SmallPtrSet<MachineInstr *, 16>;
+    using InstrSetIterator = SmallPtrSetIterator<MachineInstr *>;
 
     bool IsSingleValuePHICycle(MachineInstr *MI, unsigned &SingleValReg,
                                InstrSet &PHIsInCycle);
     bool IsDeadPHICycle(MachineInstr *MI, InstrSet &PHIsInCycle);
     bool OptimizeBB(MachineBasicBlock &MBB);
   };
-}
+
+} // end anonymous namespace
 
 char OptimizePHIs::ID = 0;
+
 char &llvm::OptimizePHIsID = OptimizePHIs::ID;
+
 INITIALIZE_PASS(OptimizePHIs, DEBUG_TYPE,
                 "Optimize machine instruction PHIs", false, false)
 
 bool OptimizePHIs::runOnMachineFunction(MachineFunction &Fn) {
-  if (skipFunction(*Fn.getFunction()))
+  if (skipFunction(Fn.getFunction()))
     return false;
 
   MRI = &Fn.getRegInfo();
@@ -144,7 +153,7 @@ bool OptimizePHIs::IsDeadPHICycle(MachineInstr *MI, InstrSet &PHIsInCycle) {
   if (PHIsInCycle.size() == 16)
     return false;
 
-  for (MachineInstr &UseMI : MRI->use_instructions(DstReg)) {
+  for (MachineInstr &UseMI : MRI->use_nodbg_instructions(DstReg)) {
     if (!UseMI.isPHI() || !IsDeadPHICycle(&UseMI, PHIsInCycle))
       return false;
   }
-- 
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