174 lines
6.6 KiB
C++
174 lines
6.6 KiB
C++
|
// RUN: %clang_cc1 -std=c++11 -S -emit-llvm -o - %s -triple x86_64-linux-gnu | FileCheck %s
|
||
|
|
// RUN: %clang_cc1 -std=c++17 -S -emit-llvm -o - %s -triple x86_64-linux-gnu | FileCheck %s
|
||
|
|
|
||
|
|
struct A { int a, b; int f(); };
|
||
|
|
|
||
|
|
namespace NonAggregateCopyInAggregateInit { // PR32044
|
||
|
|
struct A { constexpr A(int n) : x(n), y() {} int x, y; } extern a;
|
||
|
|
// CHECK-DAG: @_ZN31NonAggregateCopyInAggregateInit1bE ={{.*}} global %{{.*}} { %[[A:.*]]* @_ZN31NonAggregateCopyInAggregateInit1aE }
|
||
|
|
struct B { A &p; } b{{a}};
|
||
|
|
// CHECK-DAG: @_ZGRN31NonAggregateCopyInAggregateInit1cE_ = internal global %[[A]] { i32 1, i32 0 }
|
||
|
|
// CHECK-DAG: @_ZN31NonAggregateCopyInAggregateInit1cE ={{.*}} global %{{.*}} { %{{.*}}* @_ZGRN31NonAggregateCopyInAggregateInit1cE_ }
|
||
|
|
struct C { A &&p; } c{{1}};
|
||
|
|
}
|
||
|
|
|
||
|
|
namespace NearlyZeroInit {
|
||
|
|
// CHECK-DAG: @_ZN14NearlyZeroInit1aE ={{.*}} global {{.*}} <{ i32 1, i32 2, i32 3, [120 x i32] zeroinitializer }>
|
||
|
|
int a[123] = {1, 2, 3};
|
||
|
|
// CHECK-DAG: @_ZN14NearlyZeroInit1bE ={{.*}} global {{.*}} { i32 1, <{ i32, [2147483647 x i32] }> <{ i32 2, [2147483647 x i32] zeroinitializer }> }
|
||
|
|
struct B { int n; int arr[1024 * 1024 * 1024 * 2u]; } b = {1, {2}};
|
||
|
|
}
|
||
|
|
|
||
|
|
namespace PR37560 {
|
||
|
|
union U {
|
||
|
|
char x;
|
||
|
|
int a;
|
||
|
|
};
|
||
|
|
// FIXME: [dcl.init]p2, the padding bits of the union object should be
|
||
|
|
// initialized to 0, not undef, which would allow us to collapse the tail
|
||
|
|
// of these arrays to zeroinitializer.
|
||
|
|
// CHECK-DAG: @_ZN7PR375601cE ={{.*}} global <{ { i8, [3 x i8] } }> <{ { i8, [3 x i8] } { i8 0, [3 x i8] undef } }>
|
||
|
|
U c[1] = {};
|
||
|
|
// 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 },
|
||
|
|
U d[16] = {'a', {.a = 123}, 'b'};
|
||
|
|
// CHECK-DAG: @_ZN7PR375601eE ={{.*}} global {{.*}} <{ %"{{[^"]*}}" { i32 123 }, %"{{[^"]*}}" { i32 456 }, { i8, [3 x i8] } { i8 0, [3 x i8] undef },
|
||
|
|
U e[16] = {{.a = 123}, {.a = 456}};
|
||
|
|
|
||
|
|
union V {
|
||
|
|
int a;
|
||
|
|
char x;
|
||
|
|
};
|
||
|
|
// CHECK-DAG: @_ZN7PR375601fE ={{.*}} global [1 x %"{{[^"]*}}"] zeroinitializer
|
||
|
|
V f[1] = {};
|
||
|
|
// 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 }>
|
||
|
|
V g[16] = {{.x = 'a'}, {.a = 123}, {.x = 'b'}};
|
||
|
|
// CHECK-DAG: @_ZN7PR375601hE ={{.*}} global {{.*}} <{ %"{{[^"]*}}" { i32 123 }, %"{{[^"]*}}" { i32 456 }, [14 x %"{{[^"]*}}"] zeroinitializer }>
|
||
|
|
V h[16] = {{.a = 123}, {.a = 456}};
|
||
|
|
// CHECK-DAG: @_ZN7PR375601iE ={{.*}} global [4 x %"{{[^"]*}}"] [%"{{[^"]*}}" { i32 123 }, %"{{[^"]*}}" { i32 456 }, %"{{[^"]*}}" zeroinitializer, %"{{[^"]*}}" zeroinitializer]
|
||
|
|
V i[4] = {{.a = 123}, {.a = 456}};
|
||
|
|
}
|
||
|
|
|
||
|
|
// CHECK-LABEL: define {{.*}}@_Z3fn1i(
|
||
|
|
int fn1(int x) {
|
||
|
|
// CHECK: %[[INITLIST:.*]] = alloca %struct.A
|
||
|
|
// CHECK: %[[A:.*]] = getelementptr inbounds %struct.A, %struct.A* %[[INITLIST]], i32 0, i32 0
|
||
|
|
// CHECK: store i32 %{{.*}}, i32* %[[A]], align 4
|
||
|
|
// CHECK: %[[B:.*]] = getelementptr inbounds %struct.A, %struct.A* %[[INITLIST]], i32 0, i32 1
|
||
|
|
// CHECK: store i32 5, i32* %[[B]], align 4
|
||
|
|
// CHECK: call i32 @_ZN1A1fEv(%struct.A* {{[^,]*}} %[[INITLIST]])
|
||
|
|
return A{x, 5}.f();
|
||
|
|
}
|
||
|
|
|
||
|
|
struct B { int &r; int &f() { return r; } };
|
||
|
|
|
||
|
|
// CHECK-LABEL: define {{.*}}@_Z3fn2Ri(
|
||
|
|
int &fn2(int &v) {
|
||
|
|
// CHECK: %[[INITLIST2:.*]] = alloca %struct.B, align 8
|
||
|
|
// CHECK: %[[R:.*]] = getelementptr inbounds %struct.B, %struct.B* %[[INITLIST2:.*]], i32 0, i32 0
|
||
|
|
// CHECK: store i32* %{{.*}}, i32** %[[R]], align 8
|
||
|
|
// CHECK: call nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) i32* @_ZN1B1fEv(%struct.B* {{[^,]*}} %[[INITLIST2:.*]])
|
||
|
|
return B{v}.f();
|
||
|
|
}
|
||
|
|
|
||
|
|
// CHECK-LABEL: define {{.*}}@__cxx_global_var_init(
|
||
|
|
//
|
||
|
|
// CHECK: call {{.*}}@_ZN14NonTrivialInit1AC1Ev(
|
||
|
|
// CHECK: getelementptr inbounds {{.*}}, i64 1
|
||
|
|
// CHECK: br i1
|
||
|
|
//
|
||
|
|
// CHECK: getelementptr inbounds {{.*}}, i64 1
|
||
|
|
// CHECK: icmp eq {{.*}}, i64 30
|
||
|
|
// CHECK: br i1
|
||
|
|
//
|
||
|
|
// CHECK: call i32 @__cxa_atexit(
|
||
|
|
namespace NonTrivialInit {
|
||
|
|
struct A { A(); A(const A&) = delete; ~A(); };
|
||
|
|
struct B { A a[20]; };
|
||
|
|
// NB, this must be large enough to be worth memsetting for this test to be
|
||
|
|
// meaningful.
|
||
|
|
B b[30] = {};
|
||
|
|
}
|
||
|
|
|
||
|
|
namespace ZeroInit {
|
||
|
|
enum { Zero, One };
|
||
|
|
constexpr int zero() { return 0; }
|
||
|
|
constexpr int *null() { return nullptr; }
|
||
|
|
struct Filler {
|
||
|
|
int x;
|
||
|
|
Filler();
|
||
|
|
};
|
||
|
|
struct S1 {
|
||
|
|
int x;
|
||
|
|
};
|
||
|
|
|
||
|
|
// These declarations, if implemented elementwise, require huge
|
||
|
|
// amout of memory and compiler time.
|
||
|
|
unsigned char data_1[1024 * 1024 * 1024 * 2u] = { 0 };
|
||
|
|
unsigned char data_2[1024 * 1024 * 1024 * 2u] = { Zero };
|
||
|
|
unsigned char data_3[1024][1024][1024] = {{{0}}};
|
||
|
|
unsigned char data_4[1024 * 1024 * 1024 * 2u] = { zero() };
|
||
|
|
int *data_5[1024 * 1024 * 512] = { nullptr };
|
||
|
|
int *data_6[1024 * 1024 * 512] = { null() };
|
||
|
|
struct S1 data_7[1024 * 1024 * 512] = {{0}};
|
||
|
|
char data_8[1000 * 1000 * 1000] = {};
|
||
|
|
int (&&data_9)[1000 * 1000 * 1000] = {0};
|
||
|
|
unsigned char data_10[1024 * 1024 * 1024 * 2u] = { 1 };
|
||
|
|
unsigned char data_11[1024 * 1024 * 1024 * 2u] = { One };
|
||
|
|
unsigned char data_12[1024][1024][1024] = {{{1}}};
|
||
|
|
|
||
|
|
// This variable must be initialized elementwise.
|
||
|
|
Filler data_e1[1024] = {};
|
||
|
|
// CHECK: getelementptr inbounds {{.*}} @_ZN8ZeroInit7data_e1E
|
||
|
|
|
||
|
|
struct Largeish {
|
||
|
|
long a, b, c;
|
||
|
|
};
|
||
|
|
// CHECK: define {{.*}}@_ZN8ZeroInit9largeish1Ev(
|
||
|
|
// CHECK-NOT }
|
||
|
|
// CHECK: call {{.*}}memset
|
||
|
|
Largeish largeish1() { return {}; }
|
||
|
|
// CHECK: define {{.*}}@_ZN8ZeroInit9largeish2Ev(
|
||
|
|
// CHECK-NOT }
|
||
|
|
// CHECK: call {{.*}}memset
|
||
|
|
Largeish largeish2() { return Largeish(); }
|
||
|
|
// CHECK: define {{.*}}@_ZN8ZeroInit9largeish3Ev(
|
||
|
|
// CHECK-NOT }
|
||
|
|
// CHECK: call {{.*}}memset
|
||
|
|
Largeish largeish3() { return Largeish{}; }
|
||
|
|
// CHECK: define {{.*}}@_ZN8ZeroInit9largeish4Ev(
|
||
|
|
// CHECK-NOT }
|
||
|
|
// CHECK: call {{.*}}memset
|
||
|
|
Largeish largeish4() { return (Largeish){}; }
|
||
|
|
// CHECK: define {{.*}}@_ZN8ZeroInit9largeish5Ev(
|
||
|
|
// CHECK-NOT }
|
||
|
|
// CHECK: call {{.*}}memset
|
||
|
|
Largeish largeish5() { return {0, 0, 0}; }
|
||
|
|
|
||
|
|
typedef __attribute__((ext_vector_type(4))) char CI4;
|
||
|
|
struct Conversions {
|
||
|
|
_Complex int a;
|
||
|
|
_Complex float b;
|
||
|
|
short c;
|
||
|
|
long double d;
|
||
|
|
CI4 e;
|
||
|
|
char f;
|
||
|
|
char g;
|
||
|
|
int *h;
|
||
|
|
long i;
|
||
|
|
};
|
||
|
|
// CHECK: define {{.*}}@_ZN8ZeroInit11conversionsEv(
|
||
|
|
// CHECK-NOT }
|
||
|
|
// CHECK: call {{.*}}memset
|
||
|
|
Conversions conversions() {
|
||
|
|
return {0,
|
||
|
|
0,
|
||
|
|
0,
|
||
|
|
0,
|
||
|
|
CI4(0),
|
||
|
|
static_cast<char>(0.0),
|
||
|
|
char(0 + 0i),
|
||
|
|
reinterpret_cast<int *>(0),
|
||
|
|
reinterpret_cast<long>((int *)nullptr)};
|
||
|
|
}
|
||
|
|
}
|