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| author | Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com> | 2017-02-23 20:19:44 +0000 |
|---|---|---|
| committer | Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com> | 2017-02-23 20:19:44 +0000 |
| commit | ce3ddd2de4c5dbd5a7a68b51ea38f96cf7fbf3aa (patch) | |
| tree | 05d2e6754a3580a96a723b01dcd89dcf58eec2bb /llvm/lib/CodeGen/MachineScheduler.cpp | |
| parent | 851125dca903fdaa458d87fb0a35349286a2395f (diff) | |
| download | bcm5719-llvm-ce3ddd2de4c5dbd5a7a68b51ea38f96cf7fbf3aa.tar.gz bcm5719-llvm-ce3ddd2de4c5dbd5a7a68b51ea38f96cf7fbf3aa.zip | |
Correct register pressure calculation in presence of subregs
If a subreg is used in an instruction it counts as a whole superreg
for the purpose of register pressure calculation. This patch corrects
improper register pressure calculation by examining operand's lane mask.
Differential Revision: https://reviews.llvm.org/D29835
llvm-svn: 296009
Diffstat (limited to 'llvm/lib/CodeGen/MachineScheduler.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineScheduler.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp index 79b02c7de8c..066398358e8 100644 --- a/llvm/lib/CodeGen/MachineScheduler.cpp +++ b/llvm/lib/CodeGen/MachineScheduler.cpp @@ -1085,7 +1085,7 @@ void ScheduleDAGMILive::updatePressureDiffs( continue; PressureDiff &PDiff = getPressureDiff(&SU); - PDiff.addPressureChange(Reg, Decrement, &MRI); + PDiff.addPressureChange(P, Decrement, &MRI); DEBUG( dbgs() << " UpdateRegP: SU(" << SU.NodeNum << ") " << PrintReg(Reg, TRI) << ':' << PrintLaneMask(P.LaneMask) @@ -1123,7 +1123,7 @@ void ScheduleDAGMILive::updatePressureDiffs( LI.Query(LIS->getInstructionIndex(*SU->getInstr())); if (LRQ.valueIn() == VNI) { PressureDiff &PDiff = getPressureDiff(SU); - PDiff.addPressureChange(Reg, true, &MRI); + PDiff.addPressureChange(P, true, &MRI); DEBUG( dbgs() << " UpdateRegP: SU(" << SU->NodeNum << ") " << *SU->getInstr(); |
