1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt < %s -S -basic-aa -memcpyopt -verify-memoryssa | FileCheck %s
3target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64"
4
5declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1) nounwind
6declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) nounwind
7
8; The resulting memset is only 4-byte aligned, despite containing
9; a 16-byte aligned store in the middle.
10
11define void @foo(i32* %p) {
12; CHECK-LABEL: @foo(
13; CHECK-NEXT:    [[A0:%.*]] = getelementptr i32, i32* [[P:%.*]], i64 0
14; CHECK-NEXT:    [[A1:%.*]] = getelementptr i32, i32* [[P]], i64 1
15; CHECK-NEXT:    [[A2:%.*]] = getelementptr i32, i32* [[P]], i64 2
16; CHECK-NEXT:    [[A3:%.*]] = getelementptr i32, i32* [[P]], i64 3
17; CHECK-NEXT:    [[TMP1:%.*]] = bitcast i32* [[A0]] to i8*
18; CHECK-NEXT:    call void @llvm.memset.p0i8.i64(i8* align 4 [[TMP1]], i8 0, i64 16, i1 false)
19; CHECK-NEXT:    ret void
20;
21  %a0 = getelementptr i32, i32* %p, i64 0
22  store i32 0, i32* %a0, align 4
23  %a1 = getelementptr i32, i32* %p, i64 1
24  store i32 0, i32* %a1, align 16
25  %a2 = getelementptr i32, i32* %p, i64 2
26  store i32 0, i32* %a2, align 4
27  %a3 = getelementptr i32, i32* %p, i64 3
28  store i32 0, i32* %a3, align 4
29  ret void
30}
31
32; Replacing %a8 with %a4 in the memset requires boosting the alignment of %a4.
33
34define void @bar() {
35; CHECK-LABEL: @bar(
36; CHECK-NEXT:    [[A4:%.*]] = alloca i32, align 8
37; CHECK-NEXT:    [[A8:%.*]] = alloca i32, align 8
38; CHECK-NEXT:    [[A8_CAST:%.*]] = bitcast i32* [[A8]] to i8*
39; CHECK-NEXT:    [[A4_CAST:%.*]] = bitcast i32* [[A4]] to i8*
40; CHECK-NEXT:    [[A41:%.*]] = bitcast i32* [[A4]] to i8*
41; CHECK-NEXT:    call void @llvm.memset.p0i8.i64(i8* align 8 [[A41]], i8 0, i64 4, i1 false)
42; CHECK-NEXT:    ret void
43;
44  %a4 = alloca i32, align 4
45  %a8 = alloca i32, align 8
46  %a8.cast = bitcast i32* %a8 to i8*
47  %a4.cast = bitcast i32* %a4 to i8*
48  call void @llvm.memset.p0i8.i64(i8* align 8 %a8.cast, i8 0, i64 4, i1 false)
49  call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %a4.cast, i8* align 4 %a8.cast, i64 4, i1 false)
50  ret void
51}
52