diff options
Diffstat (limited to 'lib/CodeGen/TargetSchedule.cpp')
| -rw-r--r-- | lib/CodeGen/TargetSchedule.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/CodeGen/TargetSchedule.cpp b/lib/CodeGen/TargetSchedule.cpp index f31f67d58c..1bf14dbcef 100644 --- a/lib/CodeGen/TargetSchedule.cpp +++ b/lib/CodeGen/TargetSchedule.cpp @@ -128,6 +128,8 @@ resolveSchedClass(const MachineInstr *MI) const { // Get the definition's scheduling class descriptor from this machine model. unsigned SchedClass = MI->getDesc().getSchedClass(); const MCSchedClassDesc *SCDesc = SchedModel.getSchedClassDesc(SchedClass); + if (!SCDesc->isValid()) + return SCDesc; #ifndef NDEBUG unsigned NIter = 0; @@ -240,7 +242,10 @@ unsigned TargetSchedModel::computeOperandLatency( report_fatal_error(ss.str()); } #endif - return DefMI->isTransient() ? 0 : 1; + // FIXME: Automatically giving all implicit defs defaultDefLatency is + // undesirable. We should only do it for defs that are known to the MC + // desc like flags. Truly implicit defs should get 1 cycle latency. + return DefMI->isTransient() ? 0 : TII->defaultDefLatency(&SchedModel, DefMI); } unsigned TargetSchedModel::computeInstrLatency(const MachineInstr *MI) const { |