// RUN: %clang_cc1 -std=c++1z -triple x86_64-linux-gnu -emit-llvm -o - %s | FileCheck %s
namespace std {
using size_t = decltype(sizeof(0));
template<typename> struct tuple_size;
template<size_t, typename> struct tuple_element;
}
struct Y { int n; };
struct X { X(); X(Y); X(const X&); ~X(); };
struct A { int a : 13; bool b; };
struct B {};
template<> struct std::tuple_size<B> { enum { value = 2 }; };
template<> struct std::tuple_element<0,B> { using type = X; };
template<> struct std::tuple_element<1,B> { using type = const int&; };
template<int N> auto get(B) {
if constexpr (N == 0)
return Y();
else
return 0.0;
}
using C = int[2];
typedef int D __attribute__((ext_vector_type(2)));
using E = _Complex int;
template<typename T> T &make();
// CHECK: @_ZDC2a12a2E ={{.*}} global {{.*}} zeroinitializer, align 4
auto [a1, a2] = make<A>();
// CHECK: @_ZDC2b12b2E ={{.*}} global {{.*}} zeroinitializer, align 1
// CHECK: @b1 ={{.*}} global ptr null, align 8
// CHECK: @_ZGR2b1_ = internal global {{.*}} zeroinitializer, align 1
// CHECK: @b2 ={{.*}} global ptr null, align 8
// CHECK: @_ZGR2b2_ = internal global i32 0, align 4
auto [b1, b2] = make<B>();
// CHECK: @_ZDC2c12c2E ={{.*}} global ptr null, align 8
auto &[c1, c2] = make<C>();
// CHECK: @_ZDC2d12d2E ={{.*}} global <2 x i32> zeroinitializer, align 8
auto [d1, d2] = make<D>();
// CHECK: @_ZDC2e12e2E ={{.*}} global { i32, i32 } zeroinitializer, align 4
auto [e1, e2] = make<E>();
// CHECK: call {{.*}}ptr @_Z4makeI1AERT_v()
// CHECK: call {{.*}}memcpy{{.*}}@_ZDC2a12a2E
// CHECK: @_Z4makeI1BERT_v()
// CHECK: call i32 @_Z3getILi0EEDa1B()
// CHECK: call void @_ZN1XC1E1Y(ptr {{[^,]*}} @_ZGR2b1_, i32
// CHECK: call i32 @__cxa_atexit({{.*}}@_ZN1XD1Ev{{.*}}@_ZGR2b1_
// CHECK: store ptr @_ZGR2b1_,
//
// CHECK: call noundef double @_Z3getILi1EEDa1B()
// CHECK: fptosi double %{{.*}} to i32
// CHECK: store i32 %{{.*}}, ptr @_ZGR2b2_
// CHECK: store ptr @_ZGR2b2_, ptr @b2
// CHECK: call {{.*}}ptr @_Z4makeIA2_iERT_v()
// CHECK: store {{.*}}, ptr @_ZDC2c12c2E
// CHECK: call {{.*}}ptr @_Z4makeIDv2_iERT_v()
// CHECK: store {{.*}}, ptr @_ZDC2d12d2E, align 8
// CHECK: call {{.*}}ptr @_Z4makeICiERT_v()
// CHECK: store i32 %{{.*}}, ptr @_ZDC2e12e2E
// CHECK: store i32 %{{.*}}, ptr getelementptr inbounds nuw ({ i32, i32 }, ptr @_ZDC2e12e2E, i32 0, i32 1)
// CHECK: define{{.*}} i32 @_Z12test_globalsv()
int test_globals() {
return a2 + b2 + c2 + d2 + e2;
// CHECK: load i8, ptr getelementptr inbounds nuw (%struct.A, ptr @_ZDC2a12a2E, i32 0, i32 1)
//
// CHECK: %[[b2:.*]] = load ptr, ptr @b2
// CHECK: load i32, ptr %[[b2]]
//
// CHECK: %[[c1c2:.*]] = load ptr, ptr @_ZDC2c12c2E
// CHECK: %[[c2:.*]] = getelementptr inbounds [2 x i32], ptr %[[c1c2]], i64 0, i64 1
// CHECK: load i32, ptr %[[c2]]
//
// CHECK: %[[d1d2:.*]] = load <2 x i32>, ptr @_ZDC2d12d2E
// CHECK: extractelement <2 x i32> %[[d1d2]], i32 1
//
// CHECK: load i32, ptr getelementptr inbounds nuw ({ i32, i32 }, ptr @_ZDC2e12e2E, i32 0, i32 1)
}
// CHECK: define{{.*}} i32 @_Z11test_localsv()
int test_locals() {
auto [b1, b2] = make<B>();
// CHECK: @_Z4makeI1BERT_v()
// CHECK: call i32 @_Z3getILi0EEDa1B()
// CHECK: call void @_ZN1XC1E1Y(ptr {{[^,]*}} %[[b1:.*]], i32
//
// CHECK: call noundef double @_Z3getILi1EEDa1B()
// CHECK: %[[cvt:.*]] = fptosi double %{{.*}} to i32
// CHECK: store i32 %[[cvt]], ptr %[[b2:.*]],
// CHECK: store ptr %[[b2]], ptr %[[b2ref:.*]],
return b2;
// CHECK: %[[b2:.*]] = load ptr, ptr %[[b2ref]]
// CHECK: load i32, ptr %[[b2]]
// CHECK: call {{.*}}@_ZN1XD1Ev({{.*}}%[[b1]])
}
// CHECK: define{{.*}} void @_Z13test_bitfieldR1A(
void test_bitfield(A &a) {
auto &[a1, a2] = a;
a1 = 5;
// CHECK: load i16, ptr %[[BITFIELD:.*]],
// CHECK: and i16 %{{.*}}, -8192
// CHECK: or i16 %{{.*}}, 5
// CHECK: store i16 %{{.*}}, ptr %[[BITFIELD]],
}
// CHECK-LABEL: define {{.*}}@_Z18test_static_simple
void test_static_simple() {
static auto [x1, x2] = make<A>();
// CHECK: load atomic i8, {{.*}}@_ZGVZ18test_static_simplevEDC2x12x2E{{.*}} acquire, align 8
// CHECK: br i1
// CHECK: @__cxa_guard_acquire(
// CHECK: call {{.*}} @_Z4makeI1AERT_v(
// CHECK: memcpy{{.*}} @_ZZ18test_static_simplevEDC2x12x2E
// CHECK: @__cxa_guard_release(
}
// CHECK-LABEL: define {{.*}}@_Z17test_static_tuple
int test_static_tuple() {
// Note that the desugaring specified for this construct requires three
// separate guarded initializations. It is possible for an exception to be
// thrown after the first initialization and before the second, and if that
// happens, we are not permitted to rerun the first initialization, so we
// can't combine these into a single guarded initialization in general.
static auto [x1, x2] = make<B>();
// Initialization of the implied variable.
// CHECK: load atomic i8, {{.*}}@_ZGVZ17test_static_tuplevEDC2x12x2E{{.*}} acquire, align 8
// CHECK: br i1
// CHECK: @__cxa_guard_acquire({{.*}} @_ZGVZ17test_static_tuplevEDC2x12x2E)
// CHECK: call {{.*}} @_Z4makeI1BERT_v(
// CHECK: @__cxa_guard_release({{.*}} @_ZGVZ17test_static_tuplevEDC2x12x2E)
// Initialization of the secret 'x1' variable.
// CHECK: load atomic i8, {{.*}}@_ZGVZ17test_static_tuplevE2x1{{.*}} acquire, align 8
// CHECK: br i1
// CHECK: @__cxa_guard_acquire({{.*}} @_ZGVZ17test_static_tuplevE2x1)
// CHECK: call {{.*}} @_Z3getILi0EEDa1B(
// CHECK: call {{.*}} @_ZN1XC1E1Y({{.*}} @_ZGRZ17test_static_tuplevE2x1_,
// CHECK: call {{.*}} @__cxa_atexit({{.*}} @_ZN1XD1Ev, {{.*}} @_ZGRZ17test_static_tuplevE2x1_
// CHECK: store {{.*}} @_ZGRZ17test_static_tuplevE2x1_, {{.*}} @_ZZ17test_static_tuplevE2x1
// CHECK: call void @__cxa_guard_release({{.*}} @_ZGVZ17test_static_tuplevE2x1)
// Initialization of the secret 'x2' variable.
// CHECK: load atomic i8, {{.*}}@_ZGVZ17test_static_tuplevE2x2{{.*}} acquire, align 8
// CHECK: br i1
// CHECK: @__cxa_guard_acquire({{.*}} @_ZGVZ17test_static_tuplevE2x2)
// CHECK: call {{.*}} @_Z3getILi1EEDa1B(
// CHECK: store {{.*}}, {{.*}} @_ZGRZ17test_static_tuplevE2x2_
// CHECK: store {{.*}} @_ZGRZ17test_static_tuplevE2x2_, {{.*}} @_ZZ17test_static_tuplevE2x2
// CHECK: call void @__cxa_guard_release({{.*}} @_ZGVZ17test_static_tuplevE2x2)
struct Inner {
// CHECK-LABEL: define {{.*}}@_ZZ17test_static_tuplevEN5Inner1fEv(
// FIXME: This first load should be constant-folded to the _ZGV... temporary.
// CHECK: load {{.*}} @_ZZ17test_static_tuplevE2x2
// CHECK: load
// CHECK: ret
int f() { return x2; }
};
return Inner().f();
}
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