Index: llvm/lib/Transforms/Coroutines/CoroFrame.cpp
===================================================================
--- llvm/lib/Transforms/Coroutines/CoroFrame.cpp
+++ llvm/lib/Transforms/Coroutines/CoroFrame.cpp
@@ -1946,11 +1946,13 @@
       DVI->replaceUsesOfWith(Alloca, G);
 
     for (Instruction *I : UsersToUpdate) {
-      // It is meaningless to remain the lifetime intrinsics refer for the
+      // It is meaningless to retain the lifetime intrinsics refer for the
       // member of coroutine frames and the meaningless lifetime intrinsics
       // are possible to block further optimizations.
-      if (I->isLifetimeStartOrEnd())
+      if (I->isLifetimeStartOrEnd()) {
+        I->eraseFromParent();
         continue;
+      }
 
       I->replaceUsesOfWith(Alloca, G);
     }
Index: llvm/test/Transforms/Coroutines/coro-alloca-loop-carried-address.ll
===================================================================
--- llvm/test/Transforms/Coroutines/coro-alloca-loop-carried-address.ll
+++ llvm/test/Transforms/Coroutines/coro-alloca-loop-carried-address.ll
@@ -7,7 +7,6 @@
 define void @foo() presplitcoroutine {
 ; CHECK-LABEL: @foo(
 ; CHECK-NEXT:  entry:
-; CHECK-NEXT:    [[STACKVAR0:%.*]] = alloca i64, align 8
 ; CHECK-NEXT:    [[ID:%.*]] = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr @foo.resumers)
 ; CHECK-NEXT:    [[ALLOC:%.*]] = call ptr @malloc(i64 40)
 ; CHECK-NEXT:    [[VFRAME:%.*]] = call noalias nonnull ptr @llvm.coro.begin(token [[ID]], ptr [[ALLOC]])