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[Hexagon] Handle block live-ins with lane masks in HexagonBlockRanges 

llvm-svn: 284522
This commit is contained in:
Krzysztof Parzyszek 2016-10-18 19:47:20 +00:00
parent 4c2582ad78
commit 5bb417bed2
2 changed files with 28 additions and 11 deletions
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36
llvm/lib/Target/Hexagon/HexagonBlockRanges.cpp
View File

@ -241,11 +241,29 @@ HexagonBlockRanges::HexagonBlockRanges(MachineFunction &mf)
HexagonBlockRanges::RegisterSet HexagonBlockRanges::getLiveIns(
const MachineBasicBlock &B) {
const MachineBasicBlock &B, const MachineRegisterInfo &MRI,
const TargetRegisterInfo &TRI) {
RegisterSet LiveIns;
for (auto I : B.liveins())
if (!Reserved[I.PhysReg])
LiveIns.insert({I.PhysReg, 0});
RegisterSet Tmp;
for (auto I : B.liveins()) {
if (I.LaneMask == ~LaneBitmask(0)) {
Tmp.insert({I.PhysReg,0});
continue;
}
for (MCSubRegIndexIterator S(I.PhysReg, &TRI); S.isValid(); ++S) {
LaneBitmask M = TRI.getSubRegIndexLaneMask(S.getSubRegIndex());
if (M & I.LaneMask)
Tmp.insert({S.getSubReg(), 0});
}
}
for (auto R : Tmp) {
if (!Reserved[R.Reg])
LiveIns.insert(R);
for (auto S : expandToSubRegs(R, MRI, TRI))
if (!Reserved[S.Reg])
LiveIns.insert(S);
}
return LiveIns;
}
@ -287,9 +305,8 @@ void HexagonBlockRanges::computeInitialLiveRanges(InstrIndexMap &IndexMap,
MachineBasicBlock &B = IndexMap.getBlock();
MachineRegisterInfo &MRI = B.getParent()->getRegInfo();
for (auto R : getLiveIns(B))
for (auto S : expandToSubRegs(R, MRI, TRI))
LiveOnEntry.insert(S);
for (auto R : getLiveIns(B, MRI, TRI))
LiveOnEntry.insert(R);
for (auto R : LiveOnEntry)
LastDef[R] = IndexType::Entry;
@ -340,9 +357,8 @@ void HexagonBlockRanges::computeInitialLiveRanges(InstrIndexMap &IndexMap,
// Collect live-on-exit.
RegisterSet LiveOnExit;
for (auto *SB : B.successors())
for (auto R : getLiveIns(*SB))
for (auto S : expandToSubRegs(R, MRI, TRI))
LiveOnExit.insert(S);
for (auto R : getLiveIns(*SB, MRI, TRI))
LiveOnExit.insert(R);
for (auto R : LiveOnExit)
LastUse[R] = IndexType::Exit;

3
llvm/lib/Target/Hexagon/HexagonBlockRanges.h
View File

@ -150,7 +150,8 @@ struct HexagonBlockRanges {
};
private:
RegisterSet getLiveIns(const MachineBasicBlock &B);
RegisterSet getLiveIns(const MachineBasicBlock &B,
const MachineRegisterInfo &MRI, const TargetRegisterInfo &TRI);
void computeInitialLiveRanges(InstrIndexMap &IndexMap,
RegToRangeMap &LiveMap);