vendor/llvm-project/llvmorg-15-init-17485-ga3e38b4a206b

1 files changed, 4 insertions, 9 deletions

diff --git a/llvm/lib/CodeGen/LiveIntervals.cpp b/llvm/lib/CodeGen/LiveIntervals.cpp
index 1242ce20b732..8a76048bb8c4 100644
--- a/llvm/lib/CodeGen/LiveIntervals.cpp
+++ b/llvm/lib/CodeGen/LiveIntervals.cpp
@@ -19,7 +19,6 @@
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/iterator_range.h"
-#include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/CodeGen/LiveInterval.h"
 #include "llvm/CodeGen/LiveIntervalCalc.h"
 #include "llvm/CodeGen/LiveVariables.h"
@@ -60,9 +59,8 @@ using namespace llvm;
 
 char LiveIntervals::ID = 0;
 char &llvm::LiveIntervalsID = LiveIntervals::ID;
-INITIALIZE_PASS_BEGIN(LiveIntervals, "liveintervals",
-                "Live Interval Analysis", false, false)
-INITIALIZE_PASS_DEPENDENCY(AAResultsWrapperPass)
+INITIALIZE_PASS_BEGIN(LiveIntervals, "liveintervals", "Live Interval Analysis",
+                      false, false)
 INITIALIZE_PASS_DEPENDENCY(MachineDominatorTree)
 INITIALIZE_PASS_DEPENDENCY(SlotIndexes)
 INITIALIZE_PASS_END(LiveIntervals, "liveintervals",
@@ -87,8 +85,6 @@ cl::opt<bool> UseSegmentSetForPhysRegs(
 
 void LiveIntervals::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.setPreservesCFG();
-  AU.addRequired<AAResultsWrapperPass>();
-  AU.addPreserved<AAResultsWrapperPass>();
   AU.addPreserved<LiveVariables>();
   AU.addPreservedID(MachineLoopInfoID);
   AU.addRequiredTransitiveID(MachineDominatorsID);
@@ -126,7 +122,6 @@ bool LiveIntervals::runOnMachineFunction(MachineFunction &fn) {
   MRI = &MF->getRegInfo();
   TRI = MF->getSubtarget().getRegisterInfo();
   TII = MF->getSubtarget().getInstrInfo();
-  AA = &getAnalysis<AAResultsWrapperPass>().getAAResults();
   Indexes = &getAnalysis<SlotIndexes>();
   DomTree = &getAnalysis<MachineDominatorTree>();
 
@@ -1417,7 +1412,7 @@ private:
             NewIdxDef.getRegSlot(), (NewIdxOut + 1)->end, OldIdxVNI);
         OldIdxVNI->def = NewIdxDef;
         // Modify subsequent segments to be defined by the moved def OldIdxVNI.
-        for (auto Idx = NewIdxOut + 2; Idx <= OldIdxOut; ++Idx)
+        for (auto *Idx = NewIdxOut + 2; Idx <= OldIdxOut; ++Idx)
           Idx->valno = OldIdxVNI;
         // Aggressively remove all dead flags from the former dead definition.
         // Kill/dead flags shouldn't be used while live intervals exist; they
@@ -1662,7 +1657,7 @@ LiveIntervals::repairIntervalsInRange(MachineBasicBlock *MBB,
                                       ArrayRef<Register> OrigRegs) {
   // Find anchor points, which are at the beginning/end of blocks or at
   // instructions that already have indexes.
-  while (Begin != MBB->begin() && !Indexes->hasIndex(*Begin))
+  while (Begin != MBB->begin() && !Indexes->hasIndex(*std::prev(Begin)))
     --Begin;
   while (End != MBB->end() && !Indexes->hasIndex(*End))
     ++End;