1 files changed, 24 insertions, 0 deletions
diff --git a/llvm/lib/IR/BasicBlock.cpp b/llvm/lib/IR/BasicBlock.cpp
index 9f806fa..604ea3a 100644
--- a/llvm/lib/IR/BasicBlock.cpp
+++ b/llvm/lib/IR/BasicBlock.cpp
@@ -206,6 +206,30 @@ Instruction* BasicBlock::getFirstNonPHIOrDbgOrLifetime() {
   return nullptr;
 }
 
+Instruction *BasicBlock::getFirstNonPHIOrDbgOrLifetimeOrBitCast() {
+  for (Instruction &I : *this) {
+    if (isa<PHINode>(I) || isa<DbgInfoIntrinsic>(I))
+      continue;
+
+    if (auto *II = dyn_cast<IntrinsicInst>(&I))
+      if (II->getIntrinsicID() == Intrinsic::lifetime_start ||
+          II->getIntrinsicID() == Intrinsic::lifetime_end)
+        continue;
+
+    if (auto *BCI = dyn_cast<BitCastInst>(&I)) {
+      if (auto *II = dyn_cast<IntrinsicInst>(++I.getIterator())) {
+        if ((II->getIntrinsicID() == Intrinsic::lifetime_start ||
+             II->getIntrinsicID() == Intrinsic::lifetime_end) &&
+            II->getOperand(1) == BCI) {
+          continue;
+        }
+      }
+    }
+    return &I;
+  }
+  return nullptr;
+}
+
 BasicBlock::iterator BasicBlock::getFirstInsertionPt() {
   Instruction *FirstNonPHI = getFirstNonPHI();
   if (!FirstNonPHI)