MI-Sched cleanup. If an instruction has no valid sched class, do not attempt to check for a variant.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179451 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/TargetSchedule.cpp b/lib/CodeGen/TargetSchedule.cpp
index 783bfa1..1bf14db 100644
--- a/lib/CodeGen/TargetSchedule.cpp
+++ b/lib/CodeGen/TargetSchedule.cpp
@@ -128,6 +128,8 @@
// 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;