mi-sched: Don't call MBB.size() in initSUnits. The driver already has instr count.
This fixes a pathological compile time problem with very large blocks
and lots of scheduling boundaries.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189116 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/DFAPacketizer.cpp b/lib/CodeGen/DFAPacketizer.cpp
index 840a101..6619bcf 100644
--- a/lib/CodeGen/DFAPacketizer.cpp
+++ b/lib/CodeGen/DFAPacketizer.cpp
@@ -160,7 +160,8 @@
MachineBasicBlock::iterator EndItr) {
assert(VLIWScheduler && "VLIW Scheduler is not initialized!");
VLIWScheduler->startBlock(MBB);
- VLIWScheduler->enterRegion(MBB, BeginItr, EndItr, MBB->size());
+ VLIWScheduler->enterRegion(MBB, BeginItr, EndItr,
+ std::distance(BeginItr, EndItr));
VLIWScheduler->schedule();
// Generate MI -> SU map.