diff --git a/llvm/test/Transforms/DeadStoreElimination/MSSA/lifetime.ll b/llvm/test/Transforms/DeadStoreElimination/MSSA/lifetime.ll
index 9aa3c9c1fd42..3ed68cc7227a 100644
--- a/llvm/test/Transforms/DeadStoreElimination/MSSA/lifetime.ll
+++ b/llvm/test/Transforms/DeadStoreElimination/MSSA/lifetime.ll
@@ -1,3 +1,4 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; RUN: opt -S -basic-aa -dse < %s | FileCheck %s
 
 target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
@@ -8,28 +9,145 @@ declare void @llvm.memset.p0i8.i8(i8* nocapture, i8, i8, i1) nounwind
 
 define void @test1() {
 ; CHECK-LABEL: @test1(
+; CHECK-NEXT:    [[A:%.*]] = alloca i8, align 1
+; CHECK-NEXT:    call void @llvm.lifetime.end.p0i8(i64 1, i8* [[A]])
+; CHECK-NEXT:    ret void
+;
   %A = alloca i8
 
   store i8 0, i8* %A  ;; Written to by memset
   call void @llvm.lifetime.end.p0i8(i64 1, i8* %A)
-; CHECK: lifetime.end
 
   call void @llvm.memset.p0i8.i8(i8* %A, i8 0, i8 -1, i1 false)
-; CHECK-NOT: memset
 
   ret void
-; CHECK: ret void
 }
 
 define void @test2(i32* %P) {
-; CHECK: test2
+; CHECK-LABEL: @test2(
+; CHECK-NEXT:    [[Q:%.*]] = getelementptr i32, i32* [[P:%.*]], i32 1
+; CHECK-NEXT:    [[R:%.*]] = bitcast i32* [[Q]] to i8*
+; CHECK-NEXT:    call void @llvm.lifetime.start.p0i8(i64 4, i8* [[R]])
+; CHECK-NEXT:    call void @llvm.lifetime.end.p0i8(i64 4, i8* [[R]])
+; CHECK-NEXT:    ret void
+;
   %Q = getelementptr i32, i32* %P, i32 1
   %R = bitcast i32* %Q to i8*
   call void @llvm.lifetime.start.p0i8(i64 4, i8* %R)
-; CHECK: lifetime.start
   store i32 0, i32* %Q  ;; This store is dead.
-; CHECK-NOT: store
   call void @llvm.lifetime.end.p0i8(i64 4, i8* %R)
-; CHECK: lifetime.end
   ret void
 }
+
+; lifetime.end only marks the first two bytes of %A as dead. Make sure
+; `store i8 20, i8* %A.2 is not removed.
+define void @test3_lifetime_end_partial() {
+; CHECK-LABEL: @test3_lifetime_end_partial(
+; CHECK-NEXT:    [[A:%.*]] = alloca i32, align 4
+; CHECK-NEXT:    [[A_0:%.*]] = bitcast i32* [[A]] to i8*
+; CHECK-NEXT:    call void @llvm.lifetime.start.p0i8(i64 2, i8* [[A_0]])
+; CHECK-NEXT:    [[A_1:%.*]] = getelementptr i8, i8* [[A_0]], i64 1
+; CHECK-NEXT:    call void @llvm.lifetime.end.p0i8(i64 2, i8* [[A_0]])
+; CHECK-NEXT:    call void @use(i8* [[A_1]])
+; CHECK-NEXT:    ret void
+;
+  %A = alloca i32
+
+  %A.0 = bitcast i32 * %A to i8*
+  call void @llvm.lifetime.start.p0i8(i64 2, i8* %A.0)
+  %A.1 = getelementptr i8, i8* %A.0, i64 1
+  %A.2 = getelementptr i8, i8* %A.0, i64 2
+
+  store i8 0, i8* %A.0
+  store i8 10, i8* %A.1
+  store i8 20, i8* %A.2
+
+  call void @llvm.lifetime.end.p0i8(i64 2, i8* %A.0)
+  call void @use(i8* %A.1)
+  ret void
+}
+
+; lifetime.end only marks the first two bytes of %A as dead. Make sure
+; `store i8 20, i8* %A.2 is not removed.
+define void @test4_lifetime_end_partial_loop() {
+; CHECK-LABEL: @test4_lifetime_end_partial_loop(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[A:%.*]] = alloca i32, align 4
+; CHECK-NEXT:    [[A_0:%.*]] = bitcast i32* [[A]] to i8*
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    [[IV:%.*]] = phi i8 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
+; CHECK-NEXT:    call void @llvm.lifetime.start.p0i8(i64 2, i8* [[A_0]])
+; CHECK-NEXT:    [[A_1:%.*]] = getelementptr i8, i8* [[A_0]], i64 1
+; CHECK-NEXT:    [[A_2:%.*]] = getelementptr i8, i8* [[A_0]], i64 2
+; CHECK-NEXT:    call void @use(i8* [[A_1]])
+; CHECK-NEXT:    store i8 20, i8* [[A_2]], align 1
+; CHECK-NEXT:    store i8 10, i8* [[A_1]], align 1
+; CHECK-NEXT:    store i8 0, i8* [[A_0]], align 1
+; CHECK-NEXT:    call void @llvm.lifetime.end.p0i8(i64 2, i8* [[A_0]])
+; CHECK-NEXT:    [[IV_NEXT]] = add i8 [[IV]], 10
+; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i8 [[IV_NEXT]], 10
+; CHECK-NEXT:    br i1 [[EXITCOND]], label [[EXIT:%.*]], label [[LOOP]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret void
+;
+entry:
+  %A = alloca i32
+
+  %A.0 = bitcast i32 * %A to i8*
+  br label %loop
+
+loop:
+  %iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
+  call void @llvm.lifetime.start.p0i8(i64 2, i8* %A.0)
+  %A.1 = getelementptr i8, i8* %A.0, i64 1
+  %A.2 = getelementptr i8, i8* %A.0, i64 2
+
+  call void @use(i8* %A.1)
+
+  store i8 20, i8* %A.2
+  store i8 10, i8* %A.1
+  store i8 0, i8* %A.0
+  call void @llvm.lifetime.end.p0i8(i64 2, i8* %A.0)
+
+  %iv.next = add i8 %iv, 10
+  %exitcond = icmp eq i8 %iv.next, 10
+  br i1 %exitcond, label %exit, label %loop
+
+exit:
+  ret void
+}
+
+; lifetime.end only marks the first two bytes of %A as dead. Make sure
+; `store i8 20, i8* %A.2 is not removed.
+define void @test5_lifetime_end_partial(i32* %A) {
+; CHECK-LABEL: @test5_lifetime_end_partial(
+; CHECK-NEXT:    [[A_0:%.*]] = bitcast i32* [[A:%.*]] to i8*
+; CHECK-NEXT:    call void @llvm.lifetime.start.p0i8(i64 2, i8* [[A_0]])
+; CHECK-NEXT:    [[A_1:%.*]] = getelementptr i8, i8* [[A_0]], i64 1
+; CHECK-NEXT:    [[A_2:%.*]] = getelementptr i8, i8* [[A_0]], i64 2
+; CHECK-NEXT:    call void @llvm.lifetime.end.p0i8(i64 2, i8* [[A_0]])
+; CHECK-NEXT:    call void @use(i8* [[A_1]])
+; CHECK-NEXT:    store i8 30, i8* [[A_1]], align 1
+; CHECK-NEXT:    store i8 40, i8* [[A_2]], align 1
+; CHECK-NEXT:    ret void
+;
+
+  %A.0 = bitcast i32 * %A to i8*
+  call void @llvm.lifetime.start.p0i8(i64 2, i8* %A.0)
+  %A.1 = getelementptr i8, i8* %A.0, i64 1
+  %A.2 = getelementptr i8, i8* %A.0, i64 2
+
+  store i8 0, i8* %A.0
+  store i8 10, i8* %A.1
+  store i8 20, i8* %A.2
+
+  call void @llvm.lifetime.end.p0i8(i64 2, i8* %A.0)
+
+  call void @use(i8* %A.1)
+  store i8 30, i8* %A.1
+  store i8 40, i8* %A.2
+  ret void
+}
+
+declare void @use(i8*) readonly