If there are two consecutive llvm.dbg.stoppoint calls then
it is likely that the optimizer deleted code in between these
two intrinsics. Keep only the last llvm.dbg.stoppoint in this case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59657 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp
index e2cc897..e7d5967 100644
--- a/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -11966,7 +11966,8 @@
// We have now visited this block! If we've already been here, ignore it.
if (!Visited.insert(BB)) continue;
-
+
+ DbgInfoIntrinsic *DBI_Prev = NULL;
for (BasicBlock::iterator BBI = BB->begin(), E = BB->end(); BBI != E; ) {
Instruction *Inst = BBI++;
@@ -11987,6 +11988,20 @@
continue;
}
+ // If there are two consecutive llvm.dbg.stoppoint calls then
+ // it is likely that the optimizer deleted code in between these
+ // two intrinsics.
+ DbgInfoIntrinsic *DBI_Next = dyn_cast<DbgInfoIntrinsic>(Inst);
+ if (DBI_Next) {
+ if (DBI_Prev
+ && DBI_Prev->getIntrinsicID() == llvm::Intrinsic::dbg_stoppoint
+ && DBI_Next->getIntrinsicID() == llvm::Intrinsic::dbg_stoppoint) {
+ IC.RemoveFromWorkList(DBI_Prev);
+ DBI_Prev->eraseFromParent();
+ }
+ DBI_Prev = DBI_Next;
+ }
+
IC.AddToWorkList(Inst);
}