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gerrit-public.fairphone.software / toolchain / llvm-project / 00b51bf123d83d19b4dfc916676a7aed1b9da41e / . / llvm / test / Transforms / DeadStoreElimination / memintrinsics.ll
blob: 5bbb8e099c41be725f82352ae55b14b6d9a7b3f9 [file] [log] [blame]
Nick Lewycky90271472009-11-10 06:46:40 +0000[diff] [blame]1; RUN: opt -S -dse < %s | FileCheck %s
2
Pete Cooper67cf9a72015-11-19 05:56:52 +0000[diff] [blame]3declare void @llvm.memcpy.p0i8.p0i8.i8(i8* nocapture, i8* nocapture, i8, i32, i1) nounwind
4declare void @llvm.memmove.p0i8.p0i8.i8(i8* nocapture, i8* nocapture, i8, i32, i1) nounwind
5declare void @llvm.memset.p0i8.i8(i8* nocapture, i8, i8, i32, i1) nounwind
Nick Lewycky90271472009-11-10 06:46:40 +0000[diff] [blame]6
7define void @test1() {
Stephen Linc1c7a132013-07-14 01:42:54 +0000[diff] [blame]8; CHECK-LABEL: @test1(
Nick Lewycky90271472009-11-10 06:46:40 +0000[diff] [blame]9 %A = alloca i8
10 %B = alloca i8
11
12 store i8 0, i8* %A ;; Written to by memcpy
13; CHECK-NOT: store
14
Pete Cooper67cf9a72015-11-19 05:56:52 +0000[diff] [blame]15 call void @llvm.memcpy.p0i8.p0i8.i8(i8* %A, i8* %B, i8 -1, i32 0, i1 false)
Nick Lewycky90271472009-11-10 06:46:40 +0000[diff] [blame]16
17 ret void
18; CHECK: ret void
19}
20
21define void @test2() {
Stephen Linc1c7a132013-07-14 01:42:54 +0000[diff] [blame]22; CHECK-LABEL: @test2(
Nick Lewycky90271472009-11-10 06:46:40 +0000[diff] [blame]23 %A = alloca i8
24 %B = alloca i8
25
26 store i8 0, i8* %A ;; Written to by memmove
27; CHECK-NOT: store
28
Pete Cooper67cf9a72015-11-19 05:56:52 +0000[diff] [blame]29 call void @llvm.memmove.p0i8.p0i8.i8(i8* %A, i8* %B, i8 -1, i32 0, i1 false)
Nick Lewycky90271472009-11-10 06:46:40 +0000[diff] [blame]30
31 ret void
32; CHECK: ret void
33}
34
35define void @test3() {
Stephen Linc1c7a132013-07-14 01:42:54 +0000[diff] [blame]36; CHECK-LABEL: @test3(
Nick Lewycky90271472009-11-10 06:46:40 +0000[diff] [blame]37 %A = alloca i8
38 %B = alloca i8
39
40 store i8 0, i8* %A ;; Written to by memset
41; CHECK-NOT: store
42
Pete Cooper67cf9a72015-11-19 05:56:52 +0000[diff] [blame]43 call void @llvm.memset.p0i8.i8(i8* %A, i8 0, i8 -1, i32 0, i1 false)
Nick Lewycky90271472009-11-10 06:46:40 +0000[diff] [blame]44
45 ret void
46; CHECK: ret void
47}