I'm introducing a new machine model to simultaneously allow simple

subtarget CPU descriptions and support new features of
MachineScheduler.

MachineModel has three categories of data:
1) Basic properties for coarse grained instruction cost model.
2) Scheduler Read/Write resources for simple per-opcode and operand cost model (TBD).
3) Instruction itineraties for detailed per-cycle reservation tables.

These will all live side-by-side. Any subtarget can use any
combination of them. Instruction itineraries will not change in the
near term. In the long run, I expect them to only be relevant for
in-order VLIW machines that have complex contraints and require a
precise scheduling/bundling model. Once itineraries are only actively
used by VLIW-ish targets, they could be replaced by something more
appropriate for those targets.

This tablegen backend rewrite sets things up for introducing
MachineModel type #2: per opcode/operand cost model.

llvm-svn: 159891

1 files changed, 3 insertions, 3 deletions

diff --git a/llvm/lib/CodeGen/TargetInstrInfoImpl.cpp b/llvm/lib/CodeGen/TargetInstrInfoImpl.cpp
index 54be88a8bb0..1da5512c91b 100644
--- a/llvm/lib/CodeGen/TargetInstrInfoImpl.cpp
+++ b/llvm/lib/CodeGen/TargetInstrInfoImpl.cpp
@@ -573,9 +573,9 @@ TargetInstrInfoImpl::getNumMicroOps(const InstrItineraryData *ItinData,
 unsigned TargetInstrInfo::defaultDefLatency(const InstrItineraryData *ItinData,
                                             const MachineInstr *DefMI) const {
   if (DefMI->mayLoad())
-    return ItinData->Props.LoadLatency;
+    return ItinData->SchedModel->LoadLatency;
   if (isHighLatencyDef(DefMI->getOpcode()))
-    return ItinData->Props.HighLatency;
+    return ItinData->SchedModel->HighLatency;
   return 1;
 }
 
@@ -629,7 +629,7 @@ static int computeDefOperandLatency(
   if (FindMin) {
     // If MinLatency is valid, call getInstrLatency. This uses Stage latency if
     // it exists before defaulting to MinLatency.
-    if (ItinData->Props.MinLatency >= 0)
+    if (ItinData->SchedModel->MinLatency >= 0)
       return TII->getInstrLatency(ItinData, DefMI);
 
     // If MinLatency is invalid, OperandLatency is interpreted as MinLatency.