1 ; RUN: opt < %s -basicaa -gvn -dse -S | FileCheck %s
3 declare void @llvm.memset.i32(i8*, i8, i32, i32)
4 declare void @llvm.memset.i8(i8*, i8, i8, i32)
5 declare void @llvm.memcpy.i8(i8*, i8*, i8, i32)
6 declare void @llvm.lifetime.end(i64, i8* nocapture)
8 declare void @external(i32*)
10 define i32 @test0(i8* %P) {
12 call void @external(i32* %A)
16 call void @llvm.memset.i32(i8* %P, i8 0, i32 42, i32 1)
25 declare void @llvm.memcpy.i8(i8*, i8*, i8, i32)
32 store i8 2, i8* %B ;; Not written to by memcpy
34 call void @llvm.memcpy.i8(i8* %A, i8* %B, i8 -1, i32 0)
41 define i8 @test2(i8* %P) {
43 %P2 = getelementptr i8* %P, i32 1000
44 store i8 1, i8* %P2 ;; Not dead across memset
45 call void @llvm.memset.i8(i8* %P, i8 2, i8 127, i32 0)
51 define void @test3(i8* %P) {
53 %P2 = getelementptr i8* %P, i32 2
54 store i8 1, i8* %P2 ;; Not read by lifetime.end
56 call void @llvm.lifetime.end(i64 1, i8* %P)