1 // ignore-tidy-linelength
2 // compile-flags: -C no-prepopulate-passes
3 // min-llvm-version 7.0
19 // CHECK-LABEL: @write_pkd1
21 pub fn write_pkd1(pkd: &mut Packed1) -> u32 {
22 // CHECK: %{{.*}} = load i32, i32* %{{.*}}, align 1
23 // CHECK: store i32 42, i32* %{{.*}}, align 1
24 let result = pkd.data;
29 // CHECK-LABEL: @write_pkd2
31 pub fn write_pkd2(pkd: &mut Packed2) -> u32 {
32 // CHECK: %{{.*}} = load i32, i32* %{{.*}}, align 2
33 // CHECK: store i32 42, i32* %{{.*}}, align 2
34 let result = pkd.data;
39 pub struct Array([i32; 8]);
41 pub struct BigPacked1 {
47 pub struct BigPacked2 {
52 // CHECK-LABEL: @call_pkd1
54 pub fn call_pkd1(f: fn() -> Array) -> BigPacked1 {
55 // CHECK: [[ALLOCA:%[_a-z0-9]+]] = alloca %Array
56 // CHECK: call void %{{.*}}(%Array* noalias nocapture sret dereferenceable(32) [[ALLOCA]])
57 // CHECK: call void @llvm.memcpy.{{.*}}(i8* align 1 %{{.*}}, i8* align 4 %{{.*}}, i{{[0-9]+}} 32, i1 false)
58 // check that calls whose destination is a field of a packed struct
59 // go through an alloca rather than calling the function with an
60 // unaligned destination.
61 BigPacked1 { dealign: 0, data: f() }
64 // CHECK-LABEL: @call_pkd2
66 pub fn call_pkd2(f: fn() -> Array) -> BigPacked2 {
67 // CHECK: [[ALLOCA:%[_a-z0-9]+]] = alloca %Array
68 // CHECK: call void %{{.*}}(%Array* noalias nocapture sret dereferenceable(32) [[ALLOCA]])
69 // CHECK: call void @llvm.memcpy.{{.*}}(i8* align 2 %{{.*}}, i8* align 4 %{{.*}}, i{{[0-9]+}} 32, i1 false)
70 // check that calls whose destination is a field of a packed struct
71 // go through an alloca rather than calling the function with an
72 // unaligned destination.
73 BigPacked2 { dealign: 0, data: f() }
76 // CHECK-LABEL: @write_packed_array1
77 // CHECK: store i32 0, i32* %{{.+}}, align 1
78 // CHECK: store i32 1, i32* %{{.+}}, align 1
79 // CHECK: store i32 2, i32* %{{.+}}, align 1
81 pub fn write_packed_array1(p: &mut BigPacked1) {
87 // CHECK-LABEL: @write_packed_array2
88 // CHECK: store i32 0, i32* %{{.+}}, align 2
89 // CHECK: store i32 1, i32* %{{.+}}, align 2
90 // CHECK: store i32 2, i32* %{{.+}}, align 2
92 pub fn write_packed_array2(p: &mut BigPacked2) {
98 // CHECK-LABEL: @repeat_packed_array1
99 // CHECK: store i32 42, i32* %{{.+}}, align 1
101 pub fn repeat_packed_array1(p: &mut BigPacked1) {
105 // CHECK-LABEL: @repeat_packed_array2
106 // CHECK: store i32 42, i32* %{{.+}}, align 2
108 pub fn repeat_packed_array2(p: &mut BigPacked2) {
113 #[derive(Copy, Clone)]
114 pub struct Packed1Pair(u8, u32);
117 #[derive(Copy, Clone)]
118 pub struct Packed2Pair(u8, u32);
120 // CHECK-LABEL: @pkd1_pair
122 pub fn pkd1_pair(pair1: &mut Packed1Pair, pair2: &mut Packed1Pair) {
123 // CHECK: call void @llvm.memcpy.{{.*}}(i8* align 1 %{{.*}}, i8* align 1 %{{.*}}, i{{[0-9]+}} 5, i1 false)
127 // CHECK-LABEL: @pkd2_pair
129 pub fn pkd2_pair(pair1: &mut Packed2Pair, pair2: &mut Packed2Pair) {
130 // CHECK: call void @llvm.memcpy.{{.*}}(i8* align 2 %{{.*}}, i8* align 2 %{{.*}}, i{{[0-9]+}} 6, i1 false)
135 #[derive(Copy, Clone)]
136 pub struct Packed1NestedPair((u32, u32));
139 #[derive(Copy, Clone)]
140 pub struct Packed2NestedPair((u32, u32));
142 // CHECK-LABEL: @pkd1_nested_pair
144 pub fn pkd1_nested_pair(pair1: &mut Packed1NestedPair, pair2: &mut Packed1NestedPair) {
145 // CHECK: call void @llvm.memcpy.{{.*}}(i8* align 1 %{{.*}}, i8* align 1 %{{.*}}, i{{[0-9]+}} 8, i1 false)
149 // CHECK-LABEL: @pkd2_nested_pair
151 pub fn pkd2_nested_pair(pair1: &mut Packed2NestedPair, pair2: &mut Packed2NestedPair) {
152 // CHECK: call void @llvm.memcpy.{{.*}}(i8* align 2 %{{.*}}, i8* align 2 %{{.*}}, i{{[0-9]+}} 8, i1 false)