vendor/llvm/llvm-trunk-r338150

1 files changed, 23 insertions, 21 deletions

diff --git a/lib/CodeGen/LiveRangeEdit.cpp b/lib/CodeGen/LiveRangeEdit.cpp
index 86cfbd87f5b1..8dfe8b68c3af 100644
--- a/lib/CodeGen/LiveRangeEdit.cpp
+++ b/lib/CodeGen/LiveRangeEdit.cpp
@@ -31,21 +31,24 @@ STATISTIC(NumFracRanges,     "Number of live ranges fractured by DCE");
 
 void LiveRangeEdit::Delegate::anchor() { }
 
-LiveInterval &LiveRangeEdit::createEmptyIntervalFrom(unsigned OldReg) {
+LiveInterval &LiveRangeEdit::createEmptyIntervalFrom(unsigned OldReg,
+                                                     bool createSubRanges) {
   unsigned VReg = MRI.createVirtualRegister(MRI.getRegClass(OldReg));
-  if (VRM) {
+  if (VRM)
     VRM->setIsSplitFromReg(VReg, VRM->getOriginal(OldReg));
-  }
+
   LiveInterval &LI = LIS.createEmptyInterval(VReg);
   if (Parent && !Parent->isSpillable())
     LI.markNotSpillable();
-  // Create empty subranges if the OldReg's interval has them. Do not create
-  // the main range here---it will be constructed later after the subranges
-  // have been finalized.
-  LiveInterval &OldLI = LIS.getInterval(OldReg);
-  VNInfo::Allocator &Alloc = LIS.getVNInfoAllocator();
-  for (LiveInterval::SubRange &S : OldLI.subranges())
-    LI.createSubRange(Alloc, S.LaneMask);
+  if (createSubRanges) {
+    // Create empty subranges if the OldReg's interval has them. Do not create
+    // the main range here---it will be constructed later after the subranges
+    // have been finalized.
+    LiveInterval &OldLI = LIS.getInterval(OldReg);
+    VNInfo::Allocator &Alloc = LIS.getVNInfoAllocator();
+    for (LiveInterval::SubRange &S : OldLI.subranges())
+      LI.createSubRange(Alloc, S.LaneMask);
+  }
   return LI;
 }
 
@@ -217,8 +220,8 @@ bool LiveRangeEdit::foldAsLoad(LiveInterval *LI,
   if (!DefMI->isSafeToMove(nullptr, SawStore))
     return false;
 
-  DEBUG(dbgs() << "Try to fold single def: " << *DefMI
-               << "       into single use: " << *UseMI);
+  LLVM_DEBUG(dbgs() << "Try to fold single def: " << *DefMI
+                    << "       into single use: " << *UseMI);
 
   SmallVector<unsigned, 8> Ops;
   if (UseMI->readsWritesVirtualRegister(LI->reg, &Ops).second)
@@ -227,7 +230,7 @@ bool LiveRangeEdit::foldAsLoad(LiveInterval *LI,
   MachineInstr *FoldMI = TII.foldMemoryOperand(*UseMI, Ops, *DefMI, &LIS);
   if (!FoldMI)
     return false;
-  DEBUG(dbgs() << "                folded: " << *FoldMI);
+  LLVM_DEBUG(dbgs() << "                folded: " << *FoldMI);
   LIS.ReplaceMachineInstrInMaps(*UseMI, *FoldMI);
   UseMI->eraseFromParent();
   DefMI->addRegisterDead(LI->reg, nullptr);
@@ -264,18 +267,18 @@ void LiveRangeEdit::eliminateDeadDef(MachineInstr *MI, ToShrinkSet &ToShrink,
   }
   // Never delete inline asm.
   if (MI->isInlineAsm()) {
-    DEBUG(dbgs() << "Won't delete: " << Idx << '\t' << *MI);
+    LLVM_DEBUG(dbgs() << "Won't delete: " << Idx << '\t' << *MI);
     return;
   }
 
   // Use the same criteria as DeadMachineInstructionElim.
   bool SawStore = false;
   if (!MI->isSafeToMove(nullptr, SawStore)) {
-    DEBUG(dbgs() << "Can't delete: " << Idx << '\t' << *MI);
+    LLVM_DEBUG(dbgs() << "Can't delete: " << Idx << '\t' << *MI);
     return;
   }
 
-  DEBUG(dbgs() << "Deleting dead def " << Idx << '\t' << *MI);
+  LLVM_DEBUG(dbgs() << "Deleting dead def " << Idx << '\t' << *MI);
 
   // Collect virtual registers to be erased after MI is gone.
   SmallVector<unsigned, 8> RegsToErase;
@@ -349,7 +352,7 @@ void LiveRangeEdit::eliminateDeadDef(MachineInstr *MI, ToShrinkSet &ToShrink,
         continue;
       MI->RemoveOperand(i-1);
     }
-    DEBUG(dbgs() << "Converted physregs to:\t" << *MI);
+    LLVM_DEBUG(dbgs() << "Converted physregs to:\t" << *MI);
   } else {
     // If the dest of MI is an original reg and MI is reMaterializable,
     // don't delete the inst. Replace the dest with a new reg, and keep
@@ -357,12 +360,11 @@ void LiveRangeEdit::eliminateDeadDef(MachineInstr *MI, ToShrinkSet &ToShrink,
     // LiveRangeEdit::DeadRemats and will be deleted after all the
     // allocations of the func are done.
     if (isOrigDef && DeadRemats && TII.isTriviallyReMaterializable(*MI, AA)) {
-      LiveInterval &NewLI = createEmptyIntervalFrom(Dest);
-      NewLI.removeEmptySubRanges();
+      LiveInterval &NewLI = createEmptyIntervalFrom(Dest, false);
       VNInfo *VNI = NewLI.getNextValue(Idx, LIS.getVNInfoAllocator());
       NewLI.addSegment(LiveInterval::Segment(Idx, Idx.getDeadSlot(), VNI));
       pop_back();
-      markDeadRemat(MI);
+      DeadRemats->insert(MI);
       const TargetRegisterInfo &TRI = *MRI.getTargetRegisterInfo();
       MI->substituteRegister(Dest, NewLI.reg, 0, TRI);
       MI->getOperand(0).setIsDead(true);
@@ -463,7 +465,7 @@ LiveRangeEdit::calculateRegClassAndHint(MachineFunction &MF,
   for (unsigned I = 0, Size = size(); I < Size; ++I) {
     LiveInterval &LI = LIS.getInterval(get(I));
     if (MRI.recomputeRegClass(LI.reg))
-      DEBUG({
+      LLVM_DEBUG({
         const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
         dbgs() << "Inflated " << printReg(LI.reg) << " to "
                << TRI->getRegClassName(MRI.getRegClass(LI.reg)) << '\n';