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MachineCopyPropagation: Introduce Reg2MIMap typedef; NFC

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@261408 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matthias Braun 2016-02-20 03:56:41 +00:00
parent 4f08db2396
commit 3883deb9ef
1 changed files with 5 additions and 4 deletions
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9
lib/CodeGen/MachineCopyPropagation.cpp
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@ -48,6 +48,7 @@ namespace {
private: private:
typedef SmallVector<unsigned, 4> DestList; typedef SmallVector<unsigned, 4> DestList;
typedef DenseMap<unsigned, DestList> SourceMap; typedef DenseMap<unsigned, DestList> SourceMap;
typedef DenseMap<unsigned, MachineInstr*> Reg2MIMap;
void SourceNoLongerAvailable(unsigned Reg); void SourceNoLongerAvailable(unsigned Reg);
void CopyPropagateBlock(MachineBasicBlock &MBB); void CopyPropagateBlock(MachineBasicBlock &MBB);
@ -55,9 +56,9 @@ namespace {
/// Candidates for deletion. /// Candidates for deletion.
SmallSetVector<MachineInstr*, 8> MaybeDeadCopies; SmallSetVector<MachineInstr*, 8> MaybeDeadCopies;
/// Def -> available copies map. /// Def -> available copies map.
DenseMap<unsigned, MachineInstr*> AvailCopyMap; Reg2MIMap AvailCopyMap;
/// Def -> copies map. /// Def -> copies map.
DenseMap<unsigned, MachineInstr*> CopyMap; Reg2MIMap CopyMap;
/// Src -> Def map /// Src -> Def map
SourceMap SrcMap; SourceMap SrcMap;
bool Changed; bool Changed;
@ -176,7 +177,7 @@ void MachineCopyPropagation::CopyPropagateBlock(MachineBasicBlock &MBB) {
// If Src is defined by a previous copy, the previous copy cannot be // If Src is defined by a previous copy, the previous copy cannot be
// eliminated. // eliminated.
for (MCRegAliasIterator AI(Src, TRI, true); AI.isValid(); ++AI) { for (MCRegAliasIterator AI(Src, TRI, true); AI.isValid(); ++AI) {
CI = CopyMap.find(*AI); Reg2MIMap::iterator CI = CopyMap.find(*AI);
if (CI != CopyMap.end()) { if (CI != CopyMap.end()) {
DEBUG(dbgs() << "MCP: Copy is no longer dead: "; CI->second->dump()); DEBUG(dbgs() << "MCP: Copy is no longer dead: "; CI->second->dump());
MaybeDeadCopies.remove(CI->second); MaybeDeadCopies.remove(CI->second);
@ -242,7 +243,7 @@ void MachineCopyPropagation::CopyPropagateBlock(MachineBasicBlock &MBB) {
// If 'Reg' is defined by a copy, the copy is no longer a candidate // If 'Reg' is defined by a copy, the copy is no longer a candidate
// for elimination. // for elimination.
for (MCRegAliasIterator AI(Reg, TRI, true); AI.isValid(); ++AI) { for (MCRegAliasIterator AI(Reg, TRI, true); AI.isValid(); ++AI) {
DenseMap<unsigned, MachineInstr*>::iterator CI = CopyMap.find(*AI); Reg2MIMap::iterator CI = CopyMap.find(*AI);
if (CI != CopyMap.end()) { if (CI != CopyMap.end()) {
DEBUG(dbgs() << "MCP: Copy is used - not dead: "; CI->second->dump()); DEBUG(dbgs() << "MCP: Copy is used - not dead: "; CI->second->dump());
MaybeDeadCopies.remove(CI->second); MaybeDeadCopies.remove(CI->second);