// RUN: %clang_cc1 -triple x86_64-linux-pc -fsyntax-only -verify -fexceptions -fcxx-exceptions %s -std=c++17
// Note that this test depends on the size of long-long to be different from
// int, so it specifies a triple.
using FourShorts = short __attribute__((__vector_size__(8)));
using TwoInts = int __attribute__((__vector_size__(8)));
using TwoUInts = unsigned __attribute__((__vector_size__(8)));
using FourInts = int __attribute__((__vector_size__(16)));
using FourUInts = unsigned __attribute__((__vector_size__(16)));
using TwoLongLong = long long __attribute__((__vector_size__(16)));
using FourLongLong = long long __attribute__((__vector_size__(32)));
using TwoFloats = float __attribute__((__vector_size__(8)));
using FourFloats = float __attribute__((__vector_size__(16)));
using TwoDoubles = double __attribute__((__vector_size__(16)));
using FourDoubles = double __attribute__((__vector_size__(32)));
using EightBools = bool __attribute__((ext_vector_type(8)));
FourShorts four_shorts;
TwoInts two_ints;
TwoUInts two_uints;
FourInts four_ints;
FourUInts four_uints;
TwoLongLong two_ll;
FourLongLong four_ll;
TwoFloats two_floats;
FourFloats four_floats;
TwoDoubles two_doubles;
FourDoubles four_doubles;
EightBools eight_bools;
EightBools other_eight_bools;
enum E {};
enum class SE {};
E e;
SE se;
// Check the rules of the condition of the conditional operator.
void Condition() {
// Only int types are allowed here, the rest should fail to convert to bool.
(void)(four_floats ? 1 : 1); // expected-error {{is not contextually convertible to 'bool'}}}
(void)(two_doubles ? 1 : 1); // expected-error {{is not contextually convertible to 'bool'}}}
}
// Check the rules of the LHS/RHS of the conditional operator.
void Operands() {
(void)(four_ints ? four_ints : throw 1); // expected-error {{GNU vector conditional operand cannot be a throw expression}}
(void)(four_ints ? throw 1 : four_ints); // expected-error {{GNU vector conditional operand cannot be a throw expression}}
(void)(four_ints ?: throw 1); // expected-error {{GNU vector conditional operand cannot be a throw expression}}
(void)(four_ints ? (void)1 : four_ints); // expected-error {{GNU vector conditional operand cannot be void}}
(void)(four_ints ?: (void)1); // expected-error {{GNU vector conditional operand cannot be void}}
// Vector types must be the same element size as the condition.
(void)(four_ints ? two_ll : two_ll); // expected-error {{vector condition type 'FourInts' (vector of 4 'int' values) and result type 'TwoLongLong' (vector of 2 'long long' values) do not have the same number of elements}}
(void)(four_ints ? four_ll : four_ll); // expected-error {{vector condition type 'FourInts' (vector of 4 'int' values) and result type 'FourLongLong' (vector of 4 'long long' values) do not have elements of the same size}}
(void)(four_ints ? two_doubles : two_doubles); // expected-error {{vector condition type 'FourInts' (vector of 4 'int' values) and result type 'TwoDoubles' (vector of 2 'double' values) do not have the same number of elements}}
(void)(four_ints ? four_doubles : four_doubles); // expected-error {{vector condition type 'FourInts' (vector of 4 'int' values) and result type 'FourDoubles' (vector of 4 'double' values) do not have elements of the same size}}
(void)(four_ints ?: two_ints); // expected-error {{vector operands to the vector conditional must be the same type ('FourInts' (vector of 4 'int' values) and 'TwoInts' (vector of 2 'int' values)}}
(void)(four_ints ?: four_doubles); // expected-error {{vector operands to the vector conditional must be the same type ('FourInts' (vector of 4 'int' values) and 'FourDoubles' (vector of 4 'double' values)}}
// Scalars are promoted, but must be the same element size.
(void)(four_ints ? 3.0f : 3.0); // expected-error {{vector condition type 'FourInts' (vector of 4 'int' values) and result type '__attribute__((__vector_size__(4 * sizeof(double)))) double' (vector of 4 'double' values) do not have elements of the same size}}
(void)(four_ints ? 5ll : 5); // expected-error {{vector condition type 'FourInts' (vector of 4 'int' values) and result type '__attribute__((__vector_size__(4 * sizeof(long long)))) long long' (vector of 4 'long long' values) do not have elements of the same size}}
(void)(four_ints ?: 3.0); // expected-error {{cannot convert between scalar type 'double' and vector type 'FourInts' (vector of 4 'int' values) as implicit conversion would cause truncation}}
(void)(four_ints ?: 5ll); // We allow this despite GCc not allowing this since we support integral->vector-integral conversions despite integer rank.
// This one would be allowed in GCC, but we don't allow vectors of enum. Also,
// the error message isn't perfect, since it is only going to be a problem
// when both sides are an enum, otherwise it'll be promoted to whatever type
// the other side causes.
(void)(four_ints ? e : e); // expected-error {{enumeration type 'E' is not allowed in a vector conditional}}
(void)(four_ints ? se : se); // expected-error {{enumeration type 'SE' is not allowed in a vector conditional}}
(void)(four_shorts ? (short)5 : (unsigned short)5); // expected-error {{vector condition type 'FourShorts' (vector of 4 'short' values) and result type '__attribute__((__vector_size__(4 * sizeof(int)))) int' (vector of 4 'int' values) do not have elements of the same size}}
// They must also be convertible.
(void)(four_ints ? 3.0f : 5u);
(void)(four_ints ? 3.0f : 5);
unsigned us = 5u;
int sint = 5;
short shrt = 5;
unsigned short uss = 5u;
// The following 2 error in GCC for truncation errors, but it seems
// unimportant and inconsistent to enforce that rule.
(void)(four_ints ? 3.0f : us);
(void)(four_ints ? 3.0f : sint);
// Test promotion:
(void)(four_shorts ? uss : shrt); // expected-error {{vector condition type 'FourShorts' (vector of 4 'short' values) and result type '__attribute__((__vector_size__(4 * sizeof(int)))) int' (vector of 4 'int' values) do not have elements of the same size}}
(void)(four_shorts ? shrt : shrt); // should be fine.
(void)(four_ints ? uss : shrt); // should be fine, since they get promoted to int.
(void)(four_ints ? shrt : shrt); //expected-error {{vector condition type 'FourInts' (vector of 4 'int' values) and result type '__attribute__((__vector_size__(4 * sizeof(short)))) short' (vector of 4 'short' values) do not have elements of the same size}}
// Vectors must be the same type as eachother.
(void)(four_ints ? four_uints : four_floats); // expected-error {{vector operands to the vector conditional must be the same type ('FourUInts' (vector of 4 'unsigned int' values) and 'FourFloats' (vector of 4 'float' values))}}
(void)(four_ints ? four_uints : four_ints); // expected-error {{vector operands to the vector conditional must be the same type ('FourUInts' (vector of 4 'unsigned int' values) and 'FourInts' (vector of 4 'int' values))}}
(void)(four_ints ? four_ints : four_uints); // expected-error {{vector operands to the vector conditional must be the same type ('FourInts' (vector of 4 'int' values) and 'FourUInts' (vector of 4 'unsigned int' values))}}
// GCC rejects these, but our lax vector conversions don't seem to have a problem with them. Allow conversion of the float to an int as an extension.
(void)(four_ints ? four_uints : 3.0f);
(void)(four_ints ? four_ints : 3.0f);
// Allow conditional select on bool vectors.
(void)(eight_bools ? eight_bools : other_eight_bools);
// When there is a vector and a scalar, conversions must be legal.
(void)(four_ints ? four_floats : 3); // should work, ints can convert to floats.
(void)(four_ints ? four_uints : e); // expected-error {{cannot convert between scalar type 'E' and vector type 'FourUInts'}}
(void)(four_ints ? four_uints : se); // expected-error {{cannot convert between vector and non-scalar values ('FourUInts' (vector of 4 'unsigned int' values) and 'SE'}}
// GCC permits this, but our conversion rules reject this for truncation.
(void)(two_ints ? two_ints : us); // expected-error {{cannot convert between scalar type 'unsigned int' and vector type 'TwoInts'}}
(void)(four_shorts ? four_shorts : uss); // expected-error {{cannot convert between scalar type 'unsigned short' and vector type 'FourShorts'}}
(void)(four_ints ? four_floats : us); // expected-error {{cannot convert between scalar type 'unsigned int' and vector type 'FourFloats'}}
(void)(four_ints ? four_floats : sint); // expected-error {{cannot convert between scalar type 'int' and vector type 'FourFloats'}}
}
template <typename T1, typename T2>
struct is_same {
static constexpr bool value = false;
};
template <typename T>
struct is_same<T, T> {
static constexpr bool value = true;
};
template <typename T1, typename T2>
constexpr bool is_same_v = is_same<T1, T2>::value;
template <typename T>
T &&declval();
// Check the result types when given two vector types.
void ResultTypes() {
// Vectors must be the same, but result is the type of the LHS/RHS.
static_assert(is_same_v<TwoInts, decltype(declval<TwoInts>() ? declval<TwoInts>() : declval<TwoInts>())>);
static_assert(is_same_v<TwoFloats, decltype(declval<TwoInts>() ? declval<TwoFloats>() : declval<TwoFloats>())>);
// When both are scalars, converts to vectors of common type.
static_assert(is_same_v<TwoUInts, decltype(declval<TwoInts>() ? declval<int>() : declval<unsigned int>())>);
// Constant is allowed since it doesn't truncate, and should promote to float.
static_assert(is_same_v<TwoFloats, decltype(declval<TwoInts>() ? declval<float>() : 5u)>);
static_assert(is_same_v<TwoFloats, decltype(declval<TwoInts>() ? 5 : declval<float>())>);
// when only 1 is a scalar, it should convert to a compatible type.
static_assert(is_same_v<TwoFloats, decltype(declval<TwoInts>() ? declval<TwoFloats>() : declval<float>())>);
static_assert(is_same_v<TwoInts, decltype(declval<TwoInts>() ? declval<TwoInts>() : declval<int>())>);
static_assert(is_same_v<TwoFloats, decltype(declval<TwoInts>() ? declval<TwoFloats>() : 5)>);
// For the Binary conditional operator, the result type is either the vector on the RHS (that fits the rules on size/count), or the scalar extended to the correct count.
static_assert(is_same_v<TwoInts, decltype(declval<TwoInts>() ?: declval<TwoInts>())>);
static_assert(is_same_v<TwoInts, decltype(declval<TwoInts>() ?: declval<int>())>);
}
template <typename Cond>
void dependent_cond(Cond C) {
(void)(C ? 1 : 2);
}
template <typename Operand>
void dependent_operand(Operand C) {
(void)(two_ints ? 1 : C);
(void)(two_ints ? C : 1);
(void)(two_ints ? C : C);
}
template <typename Cond, typename LHS, typename RHS>
void all_dependent(Cond C, LHS L, RHS R) {
(void)(C ? L : R);
}
// Check dependent cases.
void Templates() {
dependent_cond(two_ints);
dependent_operand(two_floats);
// expected-error@165 {{vector operands to the vector conditional must be the same type ('__attribute__((__vector_size__(4 * sizeof(unsigned int)))) unsigned int' (vector of 4 'unsigned int' values) and '__attribute__((__vector_size__(4 * sizeof(double)))) double' (vector of 4 'double' values))}}}
all_dependent(four_ints, four_uints, four_doubles); // expected-note {{in instantiation of}}
// expected-error@165 {{vector operands to the vector conditional must be the same type ('__attribute__((__vector_size__(4 * sizeof(unsigned int)))) unsigned int' (vector of 4 'unsigned int' values) and '__attribute__((__vector_size__(2 * sizeof(unsigned int)))) unsigned int' (vector of 2 'unsigned int' values))}}}
all_dependent(four_ints, four_uints, two_uints); // expected-note {{in instantiation of}}
all_dependent(four_ints, four_uints, four_uints);
}
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