1 files changed, 3 insertions, 18 deletions
diff --git a/contrib/llvm/lib/CodeGen/RegAllocFast.cpp b/contrib/llvm/lib/CodeGen/RegAllocFast.cpp
index fd3d4d7..f4c076f 100644
--- a/contrib/llvm/lib/CodeGen/RegAllocFast.cpp
+++ b/contrib/llvm/lib/CodeGen/RegAllocFast.cpp
@@ -799,10 +799,9 @@ void RAFast::AllocateBasicBlock() {
   MachineBasicBlock::iterator MII = MBB->begin();
 
   // Add live-in registers as live.
-  for (MachineBasicBlock::livein_iterator I = MBB->livein_begin(),
-         E = MBB->livein_end(); I != E; ++I)
-    if (MRI->isAllocatable(*I))
-      definePhysReg(MII, *I, regReserved);
+  for (const auto &LI : MBB->liveins())
+    if (MRI->isAllocatable(LI.PhysReg))
+      definePhysReg(MII, LI.PhysReg, regReserved);
 
   SmallVector<unsigned, 8> VirtDead;
   SmallVector<MachineInstr*, 32> Coalesced;
@@ -986,10 +985,6 @@ void RAFast::AllocateBasicBlock() {
       }
     }
 
-    for (UsedInInstrSet::iterator
-         I = UsedInInstr.begin(), E = UsedInInstr.end(); I != E; ++I)
-      MRI->setRegUnitUsed(*I);
-
     // Track registers defined by instruction - early clobbers and tied uses at
     // this point.
     UsedInInstr.clear();
@@ -1050,10 +1045,6 @@ void RAFast::AllocateBasicBlock() {
       killVirtReg(VirtDead[i]);
     VirtDead.clear();
 
-    for (UsedInInstrSet::iterator
-         I = UsedInInstr.begin(), E = UsedInInstr.end(); I != E; ++I)
-      MRI->setRegUnitUsed(*I);
-
     if (CopyDst && CopyDst == CopySrc && CopyDstSub == CopySrcSub) {
       DEBUG(dbgs() << "-- coalescing: " << *MI);
       Coalesced.push_back(MI);
@@ -1103,12 +1094,6 @@ bool RAFast::runOnMachineFunction(MachineFunction &Fn) {
     AllocateBasicBlock();
   }
 
-  // Add the clobber lists for all the instructions we skipped earlier.
-  for (const MCInstrDesc *Desc : SkippedInstrs)
-    if (const uint16_t *Defs = Desc->getImplicitDefs())
-      while (*Defs)
-        MRI->setPhysRegUsed(*Defs++);
-
   // All machine operands and other references to virtual registers have been
   // replaced. Remove the virtual registers.
   MRI->clearVirtRegs();