1 | // RUN: %clang_cc1 -std=c++11 -S -emit-llvm -o - %s -triple x86_64-linux-gnu | FileCheck %s |
2 | |
3 | struct A { int a, b; int f(); }; |
4 | |
5 | namespace NonAggregateCopyInAggregateInit { // PR32044 |
6 | struct A { constexpr A(int n) : x(n), y() {} int x, y; } extern a; |
7 | // CHECK-DAG: @_ZN31NonAggregateCopyInAggregateInit1bE = global %{{.*}} { %[[A:.*]]* @_ZN31NonAggregateCopyInAggregateInit1aE } |
8 | struct B { A &p; } b{{a}}; |
9 | // CHECK-DAG: @_ZGRN31NonAggregateCopyInAggregateInit1cE_ = internal global %[[A]] { i32 1, i32 0 } |
10 | // CHECK-DAG: @_ZN31NonAggregateCopyInAggregateInit1cE = global %{{.*}} { %{{.*}}* @_ZGRN31NonAggregateCopyInAggregateInit1cE_ } |
11 | struct C { A &&p; } c{{1}}; |
12 | } |
13 | |
14 | namespace NearlyZeroInit { |
15 | // CHECK-DAG: @_ZN14NearlyZeroInit1aE = global {{.*}} <{ i32 1, i32 2, i32 3, [120 x i32] zeroinitializer }> |
16 | int a[123] = {1, 2, 3}; |
17 | // CHECK-DAG: @_ZN14NearlyZeroInit1bE = global {{.*}} { i32 1, <{ i32, [2147483647 x i32] }> <{ i32 2, [2147483647 x i32] zeroinitializer }> } |
18 | struct B { int n; int arr[1024 * 1024 * 1024 * 2u]; } b = {1, {2}}; |
19 | } |
20 | |
21 | namespace PR37560 { |
22 | union U { |
23 | char x; |
24 | int a; |
25 | }; |
26 | // FIXME: [dcl.init]p2, the padding bits of the union object should be |
27 | // initialized to 0, not undef, which would allow us to collapse the tail |
28 | // of these arrays to zeroinitializer. |
29 | // CHECK-DAG: @_ZN7PR375601cE = global <{ { i8, [3 x i8] } }> <{ { i8, [3 x i8] } { i8 0, [3 x i8] undef } }> |
30 | U c[1] = {}; |
31 | // CHECK-DAG: @_ZN7PR375601dE = global {{.*}} <{ { i8, [3 x i8] } { i8 97, [3 x i8] undef }, %"{{[^"]*}}" { i32 123 }, { i8, [3 x i8] } { i8 98, [3 x i8] undef }, { i8, [3 x i8] } { i8 0, [3 x i8] undef }, |
32 | U d[16] = {'a', {.a = 123}, 'b'}; |
33 | // CHECK-DAG: @_ZN7PR375601eE = global {{.*}} <{ %"{{[^"]*}}" { i32 123 }, %"{{[^"]*}}" { i32 456 }, { i8, [3 x i8] } { i8 0, [3 x i8] undef }, |
34 | U e[16] = {{.a = 123}, {.a = 456}}; |
35 | |
36 | union V { |
37 | int a; |
38 | char x; |
39 | }; |
40 | // CHECK-DAG: @_ZN7PR375601fE = global [1 x %"{{[^"]*}}"] zeroinitializer |
41 | V f[1] = {}; |
42 | // CHECK-DAG: @_ZN7PR375601gE = global {{.*}} <{ { i8, [3 x i8] } { i8 97, [3 x i8] undef }, %"{{[^"]*}}" { i32 123 }, { i8, [3 x i8] } { i8 98, [3 x i8] undef }, [13 x %"{{[^"]*}}"] zeroinitializer }> |
43 | V g[16] = {{.x = 'a'}, {.a = 123}, {.x = 'b'}}; |
44 | // CHECK-DAG: @_ZN7PR375601hE = global {{.*}} <{ %"{{[^"]*}}" { i32 123 }, %"{{[^"]*}}" { i32 456 }, [14 x %"{{[^"]*}}"] zeroinitializer }> |
45 | V h[16] = {{.a = 123}, {.a = 456}}; |
46 | // CHECK-DAG: @_ZN7PR375601iE = global [4 x %"{{[^"]*}}"] [%"{{[^"]*}}" { i32 123 }, %"{{[^"]*}}" { i32 456 }, %"{{[^"]*}}" zeroinitializer, %"{{[^"]*}}" zeroinitializer] |
47 | V i[4] = {{.a = 123}, {.a = 456}}; |
48 | } |
49 | |
50 | // CHECK-LABEL: define {{.*}}@_Z3fn1i( |
51 | int fn1(int x) { |
52 | // CHECK: %[[INITLIST:.*]] = alloca %struct.A |
53 | // CHECK: %[[A:.*]] = getelementptr inbounds %struct.A, %struct.A* %[[INITLIST]], i32 0, i32 0 |
54 | // CHECK: store i32 %{{.*}}, i32* %[[A]], align 4 |
55 | // CHECK: %[[B:.*]] = getelementptr inbounds %struct.A, %struct.A* %[[INITLIST]], i32 0, i32 1 |
56 | // CHECK: store i32 5, i32* %[[B]], align 4 |
57 | // CHECK: call i32 @_ZN1A1fEv(%struct.A* %[[INITLIST]]) |
58 | return A{x, 5}.f(); |
59 | } |
60 | |
61 | struct B { int &r; int &f() { return r; } }; |
62 | |
63 | // CHECK-LABEL: define {{.*}}@_Z3fn2Ri( |
64 | int &fn2(int &v) { |
65 | // CHECK: %[[INITLIST2:.*]] = alloca %struct.B, align 8 |
66 | // CHECK: %[[R:.*]] = getelementptr inbounds %struct.B, %struct.B* %[[INITLIST2:.*]], i32 0, i32 0 |
67 | // CHECK: store i32* %{{.*}}, i32** %[[R]], align 8 |
68 | // CHECK: call dereferenceable({{[0-9]+}}) i32* @_ZN1B1fEv(%struct.B* %[[INITLIST2:.*]]) |
69 | return B{v}.f(); |
70 | } |
71 | |
72 | // CHECK-LABEL: define {{.*}}@__cxx_global_var_init( |
73 | // |
74 | // CHECK: call {{.*}}@_ZN14NonTrivialInit1AC1Ev( |
75 | // CHECK: getelementptr inbounds {{.*}}, i64 1 |
76 | // CHECK: br i1 |
77 | // |
78 | // CHECK: getelementptr inbounds {{.*}}, i64 1 |
79 | // CHECK: icmp eq {{.*}}, i64 30 |
80 | // CHECK: br i1 |
81 | // |
82 | // CHECK: call i32 @__cxa_atexit( |
83 | namespace NonTrivialInit { |
84 | struct A { A(); A(const A&) = delete; ~A(); }; |
85 | struct B { A a[20]; }; |
86 | // NB, this must be large enough to be worth memsetting for this test to be |
87 | // meaningful. |
88 | B b[30] = {}; |
89 | } |
90 | |
91 | namespace ZeroInit { |
92 | enum { Zero, One }; |
93 | constexpr int zero() { return 0; } |
94 | constexpr int *null() { return nullptr; } |
95 | struct Filler { |
96 | int x; |
97 | Filler(); |
98 | }; |
99 | struct S1 { |
100 | int x; |
101 | }; |
102 | |
103 | // These declarations, if implemented elementwise, require huge |
104 | // amout of memory and compiler time. |
105 | unsigned char data_1[1024 * 1024 * 1024 * 2u] = { 0 }; |
106 | unsigned char data_2[1024 * 1024 * 1024 * 2u] = { Zero }; |
107 | unsigned char data_3[1024][1024][1024] = {{{0}}}; |
108 | unsigned char data_4[1024 * 1024 * 1024 * 2u] = { zero() }; |
109 | int *data_5[1024 * 1024 * 512] = { nullptr }; |
110 | int *data_6[1024 * 1024 * 512] = { null() }; |
111 | struct S1 data_7[1024 * 1024 * 512] = {{0}}; |
112 | char data_8[1000 * 1000 * 1000] = {}; |
113 | int (&&data_9)[1000 * 1000 * 1000] = {0}; |
114 | unsigned char data_10[1024 * 1024 * 1024 * 2u] = { 1 }; |
115 | unsigned char data_11[1024 * 1024 * 1024 * 2u] = { One }; |
116 | unsigned char data_12[1024][1024][1024] = {{{1}}}; |
117 | |
118 | // This variable must be initialized elementwise. |
119 | Filler data_e1[1024] = {}; |
120 | // CHECK: getelementptr inbounds {{.*}} @_ZN8ZeroInit7data_e1E |
121 | } |
122 | |