[PATCH] D150420: [LiveDebugValues] Looks like a bug?

[Vitaly Buka via Phabricator via llvm-commits]

vitalybuka created this revision.
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jmorse


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D150420

Files:
  llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp
  llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h


Index: llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h
===================================================================
--- llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h
+++ llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h
@@ -1094,7 +1094,7 @@
   MLocTracker *MTracker = nullptr;
 
   /// Number of the current block LiveDebugValues is stepping through.
-  unsigned CurBB;
+  unsigned CurBB = -1;
 
   /// Number of the current instruction LiveDebugValues is evaluating.
   unsigned CurInst;
Index: llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp
===================================================================
--- llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp
+++ llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp
@@ -1070,6 +1070,7 @@
       break;
     }
   }
+  assert(CurBB != -1u);
 
   LocIdxToIDNum[NewIdx] = ValNum;
   LocIdxToLocID[NewIdx] = ID;


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