//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "regalloc"
#include "RegisterCoalescer.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallSet.h"
#include <cmath>
using namespace llvm;
+#define DEBUG_TYPE "regalloc"
+
STATISTIC(numJoins , "Number of interval joins performed");
STATISTIC(numCrossRCs , "Number of cross class joins performed");
STATISTIC(numCommutes , "Number of instruction commuting performed");
if (MBB->pred_size() != 1 || MBB->succ_size() != 1)
return false;
- for (MachineBasicBlock::const_iterator MII = MBB->begin(), E = MBB->end();
- MII != E; ++MII) {
- if (!MII->isCopyLike() && !MII->isUnconditionalBranch())
+ for (const auto &MI : *MBB) {
+ if (!MI.isCopyLike() && !MI.isUnconditionalBranch())
return false;
}
return true;
IsDefCopy = true;
return false;
}
- if (!DefMI->isAsCheapAsAMove())
+ if (!TII->isAsCheapAsAMove(DefMI))
return false;
if (!TII->isTriviallyReMaterializable(DefMI, AA))
return false;
return false;
}
+ if (CP.getNewRC()) {
+ auto SrcRC = MRI->getRegClass(CP.getSrcReg());
+ auto DstRC = MRI->getRegClass(CP.getDstReg());
+ unsigned SrcIdx = CP.getSrcIdx();
+ unsigned DstIdx = CP.getDstIdx();
+ if (CP.isFlipped()) {
+ std::swap(SrcIdx, DstIdx);
+ std::swap(SrcRC, DstRC);
+ }
+ if (!TRI->shouldCoalesce(CopyMI, SrcRC, SrcIdx, DstRC, DstIdx,
+ CP.getNewRC())) {
+ DEBUG(dbgs() << "\tSubtarget bailed on coalescing.\n");
+ return false;
+ }
+ }
+
// Dead code elimination. This really should be handled by MachineDCE, but
// sometimes dead copies slip through, and we can't generate invalid live
// ranges.
/// Add erased instructions to ErasedInstrs.
/// Add foreign virtual registers to ShrinkRegs if their live range ended at
/// the erased instrs.
- void eraseInstrs(SmallPtrSet<MachineInstr*, 8> &ErasedInstrs,
+ void eraseInstrs(SmallPtrSetImpl<MachineInstr*> &ErasedInstrs,
SmallVectorImpl<unsigned> &ShrinkRegs);
/// Get the value assignments suitable for passing to LiveInterval::join.
}
}
-void JoinVals::eraseInstrs(SmallPtrSet<MachineInstr*, 8> &ErasedInstrs,
+void JoinVals::eraseInstrs(SmallPtrSetImpl<MachineInstr*> &ErasedInstrs,
SmallVectorImpl<unsigned> &ShrinkRegs) {
for (unsigned i = 0, e = LI.getNumValNums(); i != e; ++i) {
// Get the def location before markUnused() below invalidates it.
MF = &fn;
MRI = &fn.getRegInfo();
TM = &fn.getTarget();
- TRI = TM->getRegisterInfo();
- TII = TM->getInstrInfo();
+ TRI = TM->getSubtargetImpl()->getRegisterInfo();
+ TII = TM->getSubtargetImpl()->getInstrInfo();
LIS = &getAnalysis<LiveIntervals>();
AA = &getAnalysis<AliasAnalysis>();
Loops = &getAnalysis<MachineLoopInfo>();