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| author | Andrew Trick <atrick@apple.com> | 2013-08-30 17:58:49 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2013-08-30 17:58:49 +0000 |
| commit | 3bf33075ce98e380fc0ba7aeb5928f1151019887 (patch) | |
| tree | 87c5f0f62675b901781839b29c8de73c506cd02d /llvm/lib/CodeGen/RegisterPressure.cpp | |
| parent | 9b05d806329df11db7faf5aa7d9cc14a01021a34 (diff) | |
| download | bcm5719-llvm-3bf33075ce98e380fc0ba7aeb5928f1151019887.tar.gz bcm5719-llvm-3bf33075ce98e380fc0ba7aeb5928f1151019887.zip | |
Use LiveRangeQuery for instruction-level liveness queries.
Remove redundant or bug-prone LiveInterval APIs.
llvm-svn: 189685
Diffstat (limited to 'llvm/lib/CodeGen/RegisterPressure.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/RegisterPressure.cpp | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/llvm/lib/CodeGen/RegisterPressure.cpp b/llvm/lib/CodeGen/RegisterPressure.cpp index 1be203f36dd..27da370c961 100644 --- a/llvm/lib/CodeGen/RegisterPressure.cpp +++ b/llvm/lib/CodeGen/RegisterPressure.cpp @@ -500,8 +500,9 @@ bool RegPressureTracker::recede(SmallVectorImpl<unsigned> *LiveUses, if (RequireIntervals) { const LiveInterval *LI = getInterval(Reg); // Check if this LR is killed and not redefined here. - if (LI && !LI->isKilledAtInstr(SlotIdx) - && !LI->isDefinedByInstr(SlotIdx)) { + if (LI) { + LiveRangeQuery LRQ(*LI, SlotIdx); + if (!LRQ.isKill() && !LRQ.valueDefined()) discoverLiveOut(Reg); } } @@ -558,7 +559,7 @@ bool RegPressureTracker::advance() { bool lastUse = false; if (RequireIntervals) { const LiveInterval *LI = getInterval(Reg); - lastUse = LI && LI->isKilledAtInstr(SlotIdx); + lastUse = LI && LiveRangeQuery(*LI, SlotIdx).isKill(); } else { // Allocatable physregs are always single-use before register rewriting. @@ -882,9 +883,10 @@ void RegPressureTracker::bumpDownwardPressure(const MachineInstr *MI) { // to be bottom-scheduled to avoid searching uses at each query. SlotIndex CurrIdx = getCurrSlot(); const LiveInterval *LI = getInterval(Reg); - if (LI && LI->isKilledAtInstr(SlotIdx) - && !findUseBetween(Reg, CurrIdx, SlotIdx, MRI, LIS)) { - decreaseRegPressure(Reg); + if (LI) { + LiveRangeQuery LRQ(*LI, SlotIdx); + if (LRQ.isKill() && !findUseBetween(Reg, CurrIdx, SlotIdx, MRI, LIS)) + decreaseRegPressure(Reg); } } else if (!TargetRegisterInfo::isVirtualRegister(Reg)) { |
