1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -instcombine -S | FileCheck %s
3 ; RUN: opt < %s -instcombine -S -data-layout=n32 | FileCheck %s
4 ; RUN: opt < %s -instcombine -S -data-layout=n32:64 | FileCheck %s
5 ; RUN: opt < %s -instcombine -S -data-layout=n32:64:128 | FileCheck %s
7 declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i1) nounwind
9 ; memcpy can be expanded inline with load/store (based on the datalayout?)
11 define void @copy_1_byte(i8* %d, i8* %s) {
12 ; CHECK-LABEL: @copy_1_byte(
13 ; CHECK-NEXT: [[TMP1:%.*]] = load i8, i8* [[S:%.*]], align 1
14 ; CHECK-NEXT: store i8 [[TMP1]], i8* [[D:%.*]], align 1
15 ; CHECK-NEXT: ret void
17 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %d, i8* %s, i32 1, i1 false)
21 define void @copy_2_bytes(i8* %d, i8* %s) {
22 ; CHECK-LABEL: @copy_2_bytes(
23 ; CHECK-NEXT: [[TMP1:%.*]] = bitcast i8* [[S:%.*]] to i16*
24 ; CHECK-NEXT: [[TMP2:%.*]] = bitcast i8* [[D:%.*]] to i16*
25 ; CHECK-NEXT: [[TMP3:%.*]] = load i16, i16* [[TMP1]], align 1
26 ; CHECK-NEXT: store i16 [[TMP3]], i16* [[TMP2]], align 1
27 ; CHECK-NEXT: ret void
29 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %d, i8* %s, i32 2, i1 false)
33 ; We don't expand small non-power-of-2. Should we? Might be a target-dependent choice.
35 define void @copy_3_bytes(i8* %d, i8* %s) {
36 ; CHECK-LABEL: @copy_3_bytes(
37 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(3) [[D:%.*]], i8* noundef nonnull align 1 dereferenceable(3) [[S:%.*]], i32 3, i1 false)
38 ; CHECK-NEXT: ret void
40 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %d, i8* %s, i32 3, i1 false)
44 define void @copy_4_bytes(i8* %d, i8* %s) {
45 ; CHECK-LABEL: @copy_4_bytes(
46 ; CHECK-NEXT: [[TMP1:%.*]] = bitcast i8* [[S:%.*]] to i32*
47 ; CHECK-NEXT: [[TMP2:%.*]] = bitcast i8* [[D:%.*]] to i32*
48 ; CHECK-NEXT: [[TMP3:%.*]] = load i32, i32* [[TMP1]], align 1
49 ; CHECK-NEXT: store i32 [[TMP3]], i32* [[TMP2]], align 1
50 ; CHECK-NEXT: ret void
52 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %d, i8* %s, i32 4, i1 false)
56 ; We don't expand small non-power-of-2. Should we? Might be a target-dependent choice.
58 define void @copy_5_bytes(i8* %d, i8* %s) {
59 ; CHECK-LABEL: @copy_5_bytes(
60 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(5) [[D:%.*]], i8* noundef nonnull align 1 dereferenceable(5) [[S:%.*]], i32 5, i1 false)
61 ; CHECK-NEXT: ret void
63 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %d, i8* %s, i32 5, i1 false)
67 define void @copy_8_bytes(i8* %d, i8* %s) {
68 ; CHECK-LABEL: @copy_8_bytes(
69 ; CHECK-NEXT: [[TMP1:%.*]] = bitcast i8* [[S:%.*]] to i64*
70 ; CHECK-NEXT: [[TMP2:%.*]] = bitcast i8* [[D:%.*]] to i64*
71 ; CHECK-NEXT: [[TMP3:%.*]] = load i64, i64* [[TMP1]], align 1
72 ; CHECK-NEXT: store i64 [[TMP3]], i64* [[TMP2]], align 1
73 ; CHECK-NEXT: ret void
75 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %d, i8* %s, i32 8, i1 false)
79 define void @copy_16_bytes(i8* %d, i8* %s) {
80 ; CHECK-LABEL: @copy_16_bytes(
81 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(16) [[D:%.*]], i8* noundef nonnull align 1 dereferenceable(16) [[S:%.*]], i32 16, i1 false)
82 ; CHECK-NEXT: ret void
84 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %d, i8* %s, i32 16, i1 false)