+; RUN: opt -S -basicaa -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"
+
+declare void @llvm.lifetime.start(i64, i8* nocapture) nounwind
+declare void @llvm.lifetime.end(i64, i8* nocapture) nounwind
+declare void @llvm.memset.i8(i8*, i8, i8, i32)
+
+define void @test1() {
+; CHECK: @test1
+ %A = alloca i8
+
+ store i8 0, i8* %A ;; Written to by memset
+ call void @llvm.lifetime.end(i64 1, i8* %A)
+; CHECK: lifetime.end
+
+ call void @llvm.memset.i8(i8* %A, i8 0, i8 -1, i32 0)
+; CHECK-NOT: memset
+
+ ret void
+; CHECK: ret void
+}
+
+define void @test2(i32* %P) {
+; CHECK: test2
+ %Q = getelementptr i32* %P, i32 1
+ %R = bitcast i32* %Q to i8*
+ call void @llvm.lifetime.start(i64 4, i8* %R)
+; CHECK: lifetime.start
+ store i32 0, i32* %Q ;; This store is dead.
+; CHECK-NOT: store
+ call void @llvm.lifetime.end(i64 4, i8* %R)
+; CHECK: lifetime.end
+ ret void
+}
+
+