1 //===-- lib/Evaluate/fold-complex.cpp -------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "fold-implementation.h" 10 #include "fold-reduction.h" 11 12 namespace Fortran::evaluate { 13 14 template <int KIND> 15 Expr<Type<TypeCategory::Complex, KIND>> FoldIntrinsicFunction( 16 FoldingContext &context, 17 FunctionRef<Type<TypeCategory::Complex, KIND>> &&funcRef) { 18 using T = Type<TypeCategory::Complex, KIND>; 19 using Part = typename T::Part; 20 ActualArguments &args{funcRef.arguments()}; 21 auto *intrinsic{std::get_if<SpecificIntrinsic>(&funcRef.proc().u)}; 22 CHECK(intrinsic); 23 std::string name{intrinsic->name}; 24 if (name == "acos" || name == "acosh" || name == "asin" || name == "asinh" || 25 name == "atan" || name == "atanh" || name == "cos" || name == "cosh" || 26 name == "exp" || name == "log" || name == "sin" || name == "sinh" || 27 name == "sqrt" || name == "tan" || name == "tanh") { 28 if (auto callable{GetHostRuntimeWrapper<T, T>(name)}) { 29 return FoldElementalIntrinsic<T, T>( 30 context, std::move(funcRef), *callable); 31 } else { 32 context.messages().Say( 33 "%s(complex(kind=%d)) cannot be folded on host"_en_US, name, KIND); 34 } 35 } else if (name == "conjg") { 36 return FoldElementalIntrinsic<T, T>( 37 context, std::move(funcRef), &Scalar<T>::CONJG); 38 } else if (name == "cmplx") { 39 if (args.size() > 0 && args[0].has_value()) { 40 if (auto *x{UnwrapExpr<Expr<SomeComplex>>(args[0])}) { 41 // CMPLX(X [, KIND]) with complex X 42 return Fold(context, ConvertToType<T>(std::move(*x))); 43 } else { 44 if (args.size() >= 2 && args[1].has_value()) { 45 // Do not fold CMPLX with an Y argument that may be absent at runtime 46 // into a complex constructor so that lowering can deal with the 47 // optional aspect (there is no optional aspect with the complex 48 // constructor). 49 if (MayBePassedAsAbsentOptional(*args[1]->UnwrapExpr(), context)) { 50 return Expr<T>{std::move(funcRef)}; 51 } 52 } 53 // CMPLX(X [, Y [, KIND]]) with non-complex X 54 Expr<SomeType> re{std::move(*args[0].value().UnwrapExpr())}; 55 Expr<SomeType> im{args.size() >= 2 && args[1].has_value() 56 ? std::move(*args[1]->UnwrapExpr()) 57 : AsGenericExpr(Constant<Part>{Scalar<Part>{}})}; 58 return Fold(context, 59 Expr<T>{ 60 ComplexConstructor<KIND>{ToReal<KIND>(context, std::move(re)), 61 ToReal<KIND>(context, std::move(im))}}); 62 } 63 } 64 } else if (name == "merge") { 65 return FoldMerge<T>(context, std::move(funcRef)); 66 } else if (name == "product") { 67 auto one{Scalar<Part>::FromInteger(value::Integer<8>{1}).value}; 68 return FoldProduct<T>(context, std::move(funcRef), Scalar<T>{one}); 69 } else if (name == "sum") { 70 return FoldSum<T>(context, std::move(funcRef)); 71 } 72 // TODO: dot_product, matmul, transfer 73 return Expr<T>{std::move(funcRef)}; 74 } 75 76 template <int KIND> 77 Expr<Type<TypeCategory::Complex, KIND>> FoldOperation( 78 FoldingContext &context, ComplexConstructor<KIND> &&x) { 79 if (auto array{ApplyElementwise(context, x)}) { 80 return *array; 81 } 82 using Result = Type<TypeCategory::Complex, KIND>; 83 if (auto folded{OperandsAreConstants(x)}) { 84 return Expr<Result>{ 85 Constant<Result>{Scalar<Result>{folded->first, folded->second}}}; 86 } 87 return Expr<Result>{std::move(x)}; 88 } 89 90 #ifdef _MSC_VER // disable bogus warning about missing definitions 91 #pragma warning(disable : 4661) 92 #endif 93 FOR_EACH_COMPLEX_KIND(template class ExpressionBase, ) 94 template class ExpressionBase<SomeComplex>; 95 } // namespace Fortran::evaluate 96