Revert CodeGen: Fix assertion in machine inst sheduler due to llvm.dbg.value

This commit might have caused regression on ppc64. Revert it to verify that.

llvm-svn: 320712

2 files changed, 3 insertions, 8 deletions

diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp
index 6be13737ee3..f3017ac1448 100644
--- a/llvm/lib/CodeGen/MachineScheduler.cpp
+++ b/llvm/lib/CodeGen/MachineScheduler.cpp
@@ -1053,10 +1053,7 @@ void ScheduleDAGMILive::initRegPressure() {
     dumpRegSetPressure(BotRPTracker.getRegSetPressureAtPos(), TRI);
   );
 
-  assert((BotRPTracker.getPos() == RegionEnd ||
-          (RegionEnd->isDebugValue() &&
-           BotRPTracker.getPos() == priorNonDebug(RegionEnd, RegionBegin))) &&
-         "Can't find the region bottom");
+  assert(BotRPTracker.getPos() == RegionEnd && "Can't find the region bottom");
 
   // Cache the list of excess pressure sets in this region. This will also track
   // the max pressure in the scheduled code for these sets.
@@ -1462,8 +1459,7 @@ void ScheduleDAGMILive::scheduleMI(SUnit *SU, bool IsTopNode) {
         RegOpers.detectDeadDefs(*MI, *LIS);
       }
 
-      if (BotRPTracker.getPos() != CurrentBottom)
-        BotRPTracker.recedeSkipDebugValues();
+      BotRPTracker.recedeSkipDebugValues();
       SmallVector<RegisterMaskPair, 8> LiveUses;
       BotRPTracker.recede(RegOpers, &LiveUses);
       assert(BotRPTracker.getPos() == CurrentBottom && "out of sync");
diff --git a/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp b/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp
index ac4468f749e..e9e53d58cc9 100644
--- a/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp
+++ b/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp
@@ -776,8 +776,7 @@ void ScheduleDAGInstrs::buildSchedGraph(AliasAnalysis *AA,
       if (PDiffs != nullptr)
         PDiffs->addInstruction(SU->NodeNum, RegOpers, MRI);
 
-      if (RPTracker->getPos() == RegionEnd || &*RPTracker->getPos() != &MI)
-        RPTracker->recedeSkipDebugValues();
+      RPTracker->recedeSkipDebugValues();
       assert(&*RPTracker->getPos() == &MI && "RPTracker in sync");
       RPTracker->recede(RegOpers);
     }