diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/Utils/LoopUtils.cpp | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/llvm/lib/Transforms/Utils/LoopUtils.cpp b/llvm/lib/Transforms/Utils/LoopUtils.cpp index 045cb6284c4..16971b2edbb 100644 --- a/llvm/lib/Transforms/Utils/LoopUtils.cpp +++ b/llvm/lib/Transforms/Utils/LoopUtils.cpp @@ -584,10 +584,14 @@ void llvm::deleteDeadLoop(Loop *L, DominatorTree *DT = nullptr, // dbg.value truncates the range of any dbg.value before the loop where the // loop used to be. This is particularly important for constant values. DIBuilder DIB(*ExitBlock->getModule()); + Instruction *InsertDbgValueBefore = ExitBlock->getFirstNonPHI(); + assert(InsertDbgValueBefore && + "There should be a non-PHI instruction in exit block, else these " + "instructions will have no parent."); for (auto *DVI : DeadDebugInst) - DIB.insertDbgValueIntrinsic( - UndefValue::get(Builder.getInt32Ty()), DVI->getVariable(), - DVI->getExpression(), DVI->getDebugLoc(), ExitBlock->getFirstNonPHI()); + DIB.insertDbgValueIntrinsic(UndefValue::get(Builder.getInt32Ty()), + DVI->getVariable(), DVI->getExpression(), + DVI->getDebugLoc(), InsertDbgValueBefore); // Remove the block from the reference counting scheme, so that we can // delete it freely later. |
