| 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 | |