forked from OSchip/llvm-project
454 lines
15 KiB
C++
454 lines
15 KiB
C++
// RUN: %clang_cc1 -verify -triple x86_64-apple-darwin -emit-llvm -o - %s -std=c++11 | FileCheck %s
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// FIXME: The padding in all these objects should be zero-initialized.
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namespace StructUnion {
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struct A {
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int n;
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double d;
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union U {
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constexpr U(int x) : x(x) {}
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constexpr U(const char *y) : y(y) {}
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int x;
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const char *y;
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} u;
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constexpr A(int n, double d, int x) : n(n), d(d), u(x) {}
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constexpr A(int n, double d, const char *y) : n(n), d(d), u(y) {}
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};
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// CHECK: @_ZN11StructUnion1aE = constant {{.*}} { i32 1, double 2.000000e+00, {{.*}} { i32 3, [4 x i8] undef } }
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extern constexpr A a(1, 2.0, 3);
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// CHECK: @_ZN11StructUnion1bE = constant {{.*}} { i32 4, double 5.000000e+00, {{.*}} { i8* getelementptr inbounds ([6 x i8]* @{{.*}}, i32 0, i32 0) } }
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extern constexpr A b(4, 5, "hello");
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struct B {
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int n;
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};
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// CHECK: @_ZN11StructUnion1cE = global {{.*}} zeroinitializer
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// CHECK: @_ZN11StructUnion2c2E = global {{.*}} zeroinitializer
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B c;
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B c2 = B();
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// CHECK: @_ZN11StructUnion1dE = global {{.*}} zeroinitializer
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B d[10];
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struct C {
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constexpr C() : c(0) {}
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int c;
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};
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// CHECK: @_ZN11StructUnion1eE = global {{.*}} zeroinitializer
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C e[10];
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struct D {
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constexpr D() : d(5) {}
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int d;
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};
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// CHECK: @_ZN11StructUnion1fE = global {{.*}} { i32 5 }
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D f;
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union E {
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int a;
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void *b = &f;
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};
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// CHECK: @_ZN11StructUnion1gE = global {{.*}} @_ZN11StructUnion1fE
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E g;
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// CHECK: @_ZN11StructUnion1hE = global {{.*}} @_ZN11StructUnion1fE
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E h = E();
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}
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namespace BaseClass {
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template<typename T, unsigned> struct X : T {};
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struct C { char c = 1; };
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template<unsigned... Ns> struct Cs : X<C,Ns>... {};
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struct N { int n = 3; };
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struct D { double d = 4.0; };
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template<typename ...Ts>
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struct Test : Ts... { constexpr Test() : Ts()..., n(5) {} int n; };
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using Test1 = Test<N, C, Cs<1,2>, D, X<C,1>>;
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// CHECK: @_ZN9BaseClass2t1E = constant {{.*}} { i32 3, i8 1, i8 1, i8 1, double 4.000000e+00, i8 1, i32 5 }, align 8
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extern constexpr Test1 t1 = Test1();
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struct DN : D, N {};
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struct DND : DN, X<D,0> {};
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struct DNN : DN, X<N,0> {};
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// CHECK: @_ZN9BaseClass3dndE = constant {{.*}} { double 4.000000e+00, i32 3, double 4.000000e+00 }
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extern constexpr DND dnd = DND();
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// Note, N subobject is laid out in DN subobject's tail padding.
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// CHECK: @_ZN9BaseClass3dnnE = constant {{.*}} { double 4.000000e+00, i32 3, i32 3 }
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extern constexpr DNN dnn = DNN();
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struct E {};
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struct Test2 : X<E,0>, X<E,1>, X<E,2>, X<E,3> {};
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// CHECK: @_ZN9BaseClass2t2E = constant {{.*}} undef
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extern constexpr Test2 t2 = Test2();
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struct __attribute((packed)) PackedD { double y = 2; };
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struct Test3 : C, PackedD { constexpr Test3() {} };
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// CHECK: @_ZN9BaseClass2t3E = constant <{ i8, double }> <{ i8 1, double 2.000000e+00 }>
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extern constexpr Test3 t3 = Test3();
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}
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namespace Array {
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// CHECK: @_ZN5Array3arrE = constant [2 x i32] [i32 4, i32 0]
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extern constexpr int arr[2] = { 4 };
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// CHECK: @_ZN5Array1cE = constant [6 x [4 x i8]] [{{.*}} c"foo\00", [4 x i8] c"a\00\00\00", [4 x i8] c"bar\00", [4 x i8] c"xyz\00", [4 x i8] c"b\00\00\00", [4 x i8] c"123\00"]
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extern constexpr char c[6][4] = { "foo", "a", { "bar" }, { 'x', 'y', 'z' }, { "b" }, '1', '2', '3' };
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// CHECK: @_ZN5Array2ucE = constant [4 x i8] c"foo\00"
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extern constexpr unsigned char uc[] = { "foo" };
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struct C { constexpr C() : n(5) {} int n, m = 3 * n + 1; };
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// CHECK: @_ZN5Array5ctorsE = constant [3 x {{.*}}] [{{.*}} { i32 5, i32 16 }, {{.*}} { i32 5, i32 16 }, {{.*}} { i32 5, i32 16 }]
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extern const C ctors[3];
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constexpr C ctors[3];
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// CHECK: @_ZN5Array1dE = constant {{.*}} { [2 x i32] [i32 1, i32 2], [3 x i32] [i32 3, i32 4, i32 5] }
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struct D { int n[2]; int m[3]; } extern constexpr d = { 1, 2, 3, 4, 5 };
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struct E {
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char c[4];
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char d[4];
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constexpr E() : c("foo"), d("x") {}
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};
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// CHECK: @_ZN5Array1eE = constant {{.*}} { [4 x i8] c"foo\00", [4 x i8] c"x\00\00\00" }
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extern constexpr E e = E();
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}
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namespace MemberPtr {
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struct B1 {
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int a, b;
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virtual void f();
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void g();
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};
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struct B2 {
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int c, d;
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virtual void h();
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void i();
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};
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struct C : B1 {
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int e;
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virtual void j();
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void k();
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};
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struct D : C, B2 {
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int z;
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virtual void l();
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void m();
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};
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// CHECK: @_ZN9MemberPtr2daE = constant i64 8
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// CHECK: @_ZN9MemberPtr2dbE = constant i64 12
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// CHECK: @_ZN9MemberPtr2dcE = constant i64 32
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// CHECK: @_ZN9MemberPtr2ddE = constant i64 36
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// CHECK: @_ZN9MemberPtr2deE = constant i64 16
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// CHECK: @_ZN9MemberPtr2dzE = constant i64 40
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extern constexpr int (D::*da) = &B1::a;
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extern constexpr int (D::*db) = &C::b;
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extern constexpr int (D::*dc) = &B2::c;
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extern constexpr int (D::*dd) = &D::d;
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extern constexpr int (D::*de) = &C::e;
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extern constexpr int (D::*dz) = &D::z;
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// CHECK: @_ZN9MemberPtr2baE = constant i64 8
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// CHECK: @_ZN9MemberPtr2bbE = constant i64 12
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// CHECK: @_ZN9MemberPtr2bcE = constant i64 8
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// CHECK: @_ZN9MemberPtr2bdE = constant i64 12
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// CHECK: @_ZN9MemberPtr2beE = constant i64 16
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// CHECK: @_ZN9MemberPtr3b1zE = constant i64 40
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// CHECK: @_ZN9MemberPtr3b2zE = constant i64 16
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extern constexpr int (B1::*ba) = (int(B1::*))&B1::a;
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extern constexpr int (B1::*bb) = (int(B1::*))&C::b;
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extern constexpr int (B2::*bc) = (int(B2::*))&B2::c;
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extern constexpr int (B2::*bd) = (int(B2::*))&D::d;
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extern constexpr int (B1::*be) = (int(B1::*))&C::e;
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extern constexpr int (B1::*b1z) = (int(B1::*))&D::z;
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extern constexpr int (B2::*b2z) = (int(B2::*))&D::z;
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// CHECK: @_ZN9MemberPtr2dfE = constant {{.*}} { i64 1, i64 0 }
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// CHECK: @_ZN9MemberPtr2dgE = constant {{.*}} { i64 {{.*}}2B11gEv{{.*}}, i64 0 }
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// CHECK: @_ZN9MemberPtr2dhE = constant {{.*}} { i64 1, i64 24 }
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// CHECK: @_ZN9MemberPtr2diE = constant {{.*}} { i64 {{.*}}2B21iEv{{.*}}, i64 24 }
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// CHECK: @_ZN9MemberPtr2djE = constant {{.*}} { i64 9, i64 0 }
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// CHECK: @_ZN9MemberPtr2dkE = constant {{.*}} { i64 {{.*}}1C1kEv{{.*}}, i64 0 }
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// CHECK: @_ZN9MemberPtr2dlE = constant {{.*}} { i64 17, i64 0 }
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// CHECK: @_ZN9MemberPtr2dmE = constant {{.*}} { i64 {{.*}}1D1mEv{{.*}}, i64 0 }
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extern constexpr void (D::*df)() = &C::f;
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extern constexpr void (D::*dg)() = &B1::g;
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extern constexpr void (D::*dh)() = &B2::h;
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extern constexpr void (D::*di)() = &D::i;
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extern constexpr void (D::*dj)() = &C::j;
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extern constexpr void (D::*dk)() = &C::k;
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extern constexpr void (D::*dl)() = &D::l;
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extern constexpr void (D::*dm)() = &D::m;
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// CHECK: @_ZN9MemberPtr2bfE = constant {{.*}} { i64 1, i64 0 }
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// CHECK: @_ZN9MemberPtr2bgE = constant {{.*}} { i64 {{.*}}2B11gEv{{.*}}, i64 0 }
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// CHECK: @_ZN9MemberPtr2bhE = constant {{.*}} { i64 1, i64 0 }
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// CHECK: @_ZN9MemberPtr2biE = constant {{.*}} { i64 {{.*}}2B21iEv{{.*}}, i64 0 }
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// CHECK: @_ZN9MemberPtr2bjE = constant {{.*}} { i64 9, i64 0 }
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// CHECK: @_ZN9MemberPtr2bkE = constant {{.*}} { i64 {{.*}}1C1kEv{{.*}}, i64 0 }
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// CHECK: @_ZN9MemberPtr3b1lE = constant {{.*}} { i64 17, i64 0 }
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// CHECK: @_ZN9MemberPtr3b1mE = constant {{.*}} { i64 {{.*}}1D1mEv{{.*}}, i64 0 }
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// CHECK: @_ZN9MemberPtr3b2lE = constant {{.*}} { i64 17, i64 -24 }
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// CHECK: @_ZN9MemberPtr3b2mE = constant {{.*}} { i64 {{.*}}1D1mEv{{.*}}, i64 -24 }
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extern constexpr void (B1::*bf)() = (void(B1::*)())&C::f;
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extern constexpr void (B1::*bg)() = (void(B1::*)())&B1::g;
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extern constexpr void (B2::*bh)() = (void(B2::*)())&B2::h;
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extern constexpr void (B2::*bi)() = (void(B2::*)())&D::i;
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extern constexpr void (B1::*bj)() = (void(B1::*)())&C::j;
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extern constexpr void (B1::*bk)() = (void(B1::*)())&C::k;
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extern constexpr void (B1::*b1l)() = (void(B1::*)())&D::l;
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extern constexpr void (B1::*b1m)() = (void(B1::*)())&D::m;
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extern constexpr void (B2::*b2l)() = (void(B2::*)())&D::l;
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extern constexpr void (B2::*b2m)() = (void(B2::*)())&D::m;
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}
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namespace LiteralReference {
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struct Lit {
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constexpr Lit() : n(5) {}
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int n;
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};
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// FIXME: This should have static initialization, but we do not implement
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// that yet. For now, just check that we don't set the (pointer) value of
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// the reference to 5!
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//
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// CHECK: @_ZN16LiteralReference3litE = global {{.*}} null
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const Lit &lit = Lit();
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}
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namespace NonLiteralConstexpr {
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constexpr int factorial(int n) {
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return n ? factorial(n-1) * n : 1;
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}
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extern void f(int *p);
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struct NonTrivialDtor {
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constexpr NonTrivialDtor() : n(factorial(5)), p(&n) {}
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~NonTrivialDtor() {
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f(p);
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}
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int n;
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int *p;
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};
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static_assert(!__is_literal(NonTrivialDtor), "");
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// CHECK: @_ZN19NonLiteralConstexpr3ntdE = global {{.*}} { i32 120, i32* getelementptr
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NonTrivialDtor ntd;
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struct VolatileMember {
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constexpr VolatileMember() : n(5) {}
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volatile int n;
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};
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static_assert(!__is_literal(VolatileMember), "");
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// CHECK: @_ZN19NonLiteralConstexpr2vmE = global {{.*}} { i32 5 }
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VolatileMember vm;
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struct Both {
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constexpr Both() : n(10) {}
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~Both();
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volatile int n;
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};
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// CHECK: @_ZN19NonLiteralConstexpr1bE = global {{.*}} { i32 10 }
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Both b;
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void StaticVars() {
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// CHECK: @_ZZN19NonLiteralConstexpr10StaticVarsEvE3ntd = {{.*}} { i32 120, i32* getelementptr {{.*}}
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// CHECK: @_ZGVZN19NonLiteralConstexpr10StaticVarsEvE3ntd =
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static NonTrivialDtor ntd;
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// CHECK: @_ZZN19NonLiteralConstexpr10StaticVarsEvE2vm = {{.*}} { i32 5 }
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// CHECK-NOT: @_ZGVZN19NonLiteralConstexpr10StaticVarsEvE2vm =
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static VolatileMember vm;
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// CHECK: @_ZZN19NonLiteralConstexpr10StaticVarsEvE1b = {{.*}} { i32 10 }
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// CHECK: @_ZGVZN19NonLiteralConstexpr10StaticVarsEvE1b =
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static Both b;
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}
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}
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// PR12067
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namespace VirtualMembers {
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struct A {
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constexpr A(double d) : d(d) {}
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virtual void f();
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double d;
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};
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struct B : A {
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constexpr B() : A(2.0), c{'h', 'e', 'l', 'l', 'o'} {}
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constexpr B(int n) : A(n), c{'w', 'o', 'r', 'l', 'd'} {}
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virtual void g();
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char c[5];
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};
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struct C {
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constexpr C() : n(64) {}
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int n;
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};
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struct D : C, A, B {
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constexpr D() : A(1.0), B(), s(5) {}
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short s;
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};
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struct E : D, B {
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constexpr E() : B(3), c{'b','y','e'} {}
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char c[3];
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};
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// CHECK: @_ZN14VirtualMembers1eE = global { i8**, double, i32, i8**, double, [5 x i8], i16, i8**, double, [5 x i8], [3 x i8] } { i8** getelementptr inbounds ([11 x i8*]* @_ZTVN14VirtualMembers1EE, i64 0, i64 2), double 1.000000e+00, i32 64, i8** getelementptr inbounds ([11 x i8*]* @_ZTVN14VirtualMembers1EE, i64 0, i64 5), double 2.000000e+00, [5 x i8] c"hello", i16 5, i8** getelementptr inbounds ([11 x i8*]* @_ZTVN14VirtualMembers1EE, i64 0, i64 9), double 3.000000e+00, [5 x i8] c"world", [3 x i8] c"bye" }
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E e;
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struct nsMemoryImpl {
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virtual void f();
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};
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// CHECK: @_ZN14VirtualMembersL13sGlobalMemoryE = internal global { i8** } { i8** getelementptr inbounds ([3 x i8*]* @_ZTVN14VirtualMembers12nsMemoryImplE, i64 0, i64 2) }
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static nsMemoryImpl sGlobalMemory;
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}
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namespace PR13273 {
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struct U {
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int t;
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U() = default;
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};
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struct S : U {
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S() = default;
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};
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// CHECK: @_ZN7PR13273L1sE = {{.*}} zeroinitializer
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const S s {};
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}
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// Constant initialization tests go before this point,
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// dynamic initialization tests go after.
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// We must emit a constant initializer for NonLiteralConstexpr::ntd, but also
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// emit an initializer to register its destructor.
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// CHECK: define {{.*}}cxx_global_var_init{{.*}}
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// CHECK-NOT: NonLiteralConstexpr
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// CHECK: call {{.*}}cxa_atexit{{.*}} @_ZN19NonLiteralConstexpr14NonTrivialDtorD1Ev {{.*}} @_ZN19NonLiteralConstexpr3ntdE
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// CHECK-NEXT: ret void
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// We don't need to emit any dynamic initialization for NonLiteralConstexpr::vm.
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// CHECK-NOT: NonLiteralConstexpr2vm
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// We must emit a constant initializer for NonLiteralConstexpr::b, but also
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// emit an initializer to register its destructor.
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// CHECK: define {{.*}}cxx_global_var_init{{.*}}
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// CHECK-NOT: NonLiteralConstexpr
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// CHECK: call {{.*}}cxa_atexit{{.*}} @_ZN19NonLiteralConstexpr4BothD1Ev {{.*}} @_ZN19NonLiteralConstexpr1bE
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// CHECK-NEXT: ret void
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// CHECK: define {{.*}}NonLiteralConstexpr10StaticVars
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// CHECK-NOT: }
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// CHECK: call {{.*}}cxa_atexit{{.*}}@_ZN19NonLiteralConstexpr14NonTrivialDtorD1Ev
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// CHECK-NOT: }
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// CHECK: call {{.*}}cxa_atexit{{.*}}@_ZN19NonLiteralConstexpr4BothD1Ev
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namespace CrossFuncLabelDiff {
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// Make sure we refuse to constant-fold the variable b.
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constexpr long a(bool x) { return x ? 0 : (long)&&lbl + (0 && ({lbl: 0;})); }
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void test() { static long b = (long)&&lbl - a(false); lbl: return; }
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// CHECK: sub nsw i64 ptrtoint (i8* blockaddress(@_ZN18CrossFuncLabelDiff4testEv, {{.*}}) to i64),
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// CHECK: store i64 {{.*}}, i64* @_ZZN18CrossFuncLabelDiff4testEvE1b, align 8
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}
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// PR12012
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namespace VirtualBase {
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struct B {};
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struct D : virtual B {};
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D d;
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// CHECK: call {{.*}}@_ZN11VirtualBase1DC1Ev
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template<typename T> struct X : T {
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constexpr X() : T() {}
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};
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X<D> x;
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// CHECK: call {{.*}}@_ZN11VirtualBase1XINS_1DEEC1Ev
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}
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// PR12145
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namespace Unreferenced {
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int n;
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constexpr int *p = &n;
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// We must not emit a load of 'p' here, since it's not odr-used.
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int q = *p;
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// CHECK-NOT: _ZN12Unreferenced1pE
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// CHECK: = load i32* @_ZN12Unreferenced1nE
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// CHECK-NEXT: store i32 {{.*}}, i32* @_ZN12Unreferenced1qE
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// CHECK-NOT: _ZN12Unreferenced1pE
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// Technically, we are not required to substitute variables of reference types
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// initialized by constant expressions, because the special case for odr-use
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// of variables in [basic.def.odr]p2 only applies to objects. But we do so
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// anyway.
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constexpr int &r = n;
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// CHECK-NOT: _ZN12Unreferenced1rE
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int s = r;
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const int t = 1;
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const int &rt = t;
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int f(int);
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int u = f(rt);
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// CHECK: call i32 @_ZN12Unreferenced1fEi(i32 1)
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}
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namespace InitFromConst {
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template<typename T> void consume(T);
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const bool b = true;
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const int n = 5;
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constexpr double d = 4.3;
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struct S { int n = 7; S *p = 0; };
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constexpr S s = S();
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const S &r = s;
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constexpr const S *p = &r;
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constexpr int S::*mp = &S::n;
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constexpr int a[3] = { 1, 4, 9 };
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void test() {
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// CHECK: call void @_ZN13InitFromConst7consumeIbEEvT_(i1 zeroext true)
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consume(b);
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// CHECK: call void @_ZN13InitFromConst7consumeIiEEvT_(i32 5)
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consume(n);
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// CHECK: call void @_ZN13InitFromConst7consumeIdEEvT_(double 4.300000e+00)
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consume(d);
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// CHECK: call void @_ZN13InitFromConst7consumeIRKNS_1SEEEvT_(%"struct.InitFromConst::S"* @_ZN13InitFromConstL1sE)
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consume<const S&>(s);
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// FIXME CHECK-NOT: call void @_ZN13InitFromConst7consumeIRKNS_1SEEEvT_(%"struct.InitFromConst::S"* @_ZN13InitFromConstL1sE)
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// There's no lvalue-to-rvalue conversion here, so 'r' is odr-used, and
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// we're permitted to emit a load of it. This seems likely to be a defect
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// in the standard. If we start emitting a direct reference to 's', update
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// this test.
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consume<const S&>(r);
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// CHECK: call void @_ZN13InitFromConst7consumeIPKNS_1SEEEvT_(%"struct.InitFromConst::S"* @_ZN13InitFromConstL1sE)
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consume(p);
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// CHECK: call void @_ZN13InitFromConst7consumeIMNS_1SEiEEvT_(i64 0)
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consume(mp);
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// CHECK: call void @_ZN13InitFromConst7consumeIPKiEEvT_(i32* getelementptr inbounds ([3 x i32]* @_ZN13InitFromConstL1aE, i32 0, i32 0))
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consume(a);
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}
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}
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namespace Null {
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decltype(nullptr) null();
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// CHECK: call {{.*}} @_ZN4Null4nullEv(
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int *p = null();
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struct S {};
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// CHECK: call {{.*}} @_ZN4Null4nullEv(
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int S::*q = null();
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}
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