[MachineCombiner] Removal of dangling DBG_VALUES after combining [20598]
This is a cleaner solution to the problem described in r215431.
When instructions are combined a dangling DBG_VALUE is removed.
This resolves bug 20598.
llvm-svn: 215587
diff --git a/llvm/lib/CodeGen/MachineCombiner.cpp b/llvm/lib/CodeGen/MachineCombiner.cpp
index 032b4ee..aeb864e 100644
--- a/llvm/lib/CodeGen/MachineCombiner.cpp
+++ b/llvm/lib/CodeGen/MachineCombiner.cpp
@@ -380,7 +380,7 @@
MBB->insert((MachineBasicBlock::iterator) & MI,
(MachineInstr *)InstrPtr);
for (auto *InstrPtr : DelInstrs)
- InstrPtr->eraseFromParent();
+ InstrPtr->eraseFromParentAndMarkDBGValuesForRemoval();
Changed = true;
++NumInstCombined;