#include "VirtRegMap.h"
#include "llvm/CodeGen/LiveIntervalAnalysis.h"
#include "llvm/Value.h"
-#include "llvm/CodeGen/LiveVariables.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
AU.addPreservedID(MachineDominatorsID);
AU.addPreservedID(PHIEliminationID);
AU.addPreservedID(TwoAddressInstructionPassID);
- AU.addRequired<LiveVariables>();
AU.addRequired<LiveIntervals>();
AU.addRequired<MachineLoopInfo>();
MachineFunctionPass::getAnalysisUsage(AU);
// simply extend BLR if CopyMI doesn't end the range.
DOUT << "\nExtending: "; IntB.print(DOUT, tri_);
- IntB.removeValNo(BValNo);
+ // Remove val#'s defined by copies that will be coalesced away.
for (unsigned i = 0, e = BDeadValNos.size(); i != e; ++i)
IntB.removeValNo(BDeadValNos[i]);
- VNInfo *ValNo = IntB.getNextValue(AValNo->def, 0, li_->getVNInfoAllocator());
+
+ // Extend BValNo by merging in IntA live ranges of AValNo. Val# definition
+ // is updated. Kills are also updated.
+ VNInfo *ValNo = BValNo;
+ ValNo->def = AValNo->def;
+ ValNo->copy = NULL;
+ for (unsigned j = 0, ee = ValNo->kills.size(); j != ee; ++j) {
+ unsigned Kill = ValNo->kills[j];
+ if (Kill != BLR->end)
+ BKills.push_back(Kill);
+ }
+ ValNo->kills.clear();
for (LiveInterval::iterator AI = IntA.begin(), AE = IntA.end();
AI != AE; ++AI) {
if (AI->valno != AValNo) continue;
// if this will cause a high use density interval to target a smaller
// set of registers.
if (SmallRegSize > Threshold || LargeRegSize > Threshold) {
- LiveVariables::VarInfo &svi = lv_->getVarInfo(LargeReg);
- LiveVariables::VarInfo &dvi = lv_->getVarInfo(SmallReg);
- if ((float)dvi.NumUses / SmallRegSize <
- (float)svi.NumUses / LargeRegSize) {
+ if ((float)std::distance(mri_->use_begin(SmallReg),
+ mri_->use_end()) / SmallRegSize <
+ (float)std::distance(mri_->use_begin(LargeReg),
+ mri_->use_end()) / LargeRegSize) {
Again = true; // May be possible to coalesce later.
return false;
}
// do not join them, instead mark the physical register as its allocation
// preference.
unsigned Length = JoinVInt.getSize() / InstrSlots::NUM;
- LiveVariables::VarInfo &vi = lv_->getVarInfo(JoinVReg);
if (Length > Threshold &&
- (((float)vi.NumUses / Length) < (1.0 / Threshold))) {
+ (((float)std::distance(mri_->use_begin(JoinVReg),
+ mri_->use_end()) / Length) < (1.0 / Threshold))) {
JoinVInt.preference = JoinPReg;
++numAborts;
DOUT << "\tMay tie down a physical register, abort!\n";
for (const unsigned *AS = tri_->getSubRegisters(DstReg); *AS; ++AS)
li_->getOrCreateInterval(*AS).MergeInClobberRanges(*ResSrcInt,
li_->getVNInfoAllocator());
- } else {
- // Merge use info if the destination is a virtual register.
- LiveVariables::VarInfo& dVI = lv_->getVarInfo(DstReg);
- LiveVariables::VarInfo& sVI = lv_->getVarInfo(SrcReg);
- dVI.NumUses += sVI.NumUses;
}
// If this is a EXTRACT_SUBREG, make sure the result of coalescing is the
tri_ = tm_->getRegisterInfo();
tii_ = tm_->getInstrInfo();
li_ = &getAnalysis<LiveIntervals>();
- lv_ = &getAnalysis<LiveVariables>();
loopInfo = &getAnalysis<MachineLoopInfo>();
DOUT << "********** SIMPLE REGISTER COALESCING **********\n"