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comparison flang/lib/Evaluate/fold-real.cpp @ 173:0572611fdcc8 llvm10 llvm12

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reorgnization done
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Mon, 25 May 2020 11:55:54 +0900
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children 2e18cbf3894f
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172:9fbae9c8bf63 173:0572611fdcc8
1 //===-- lib/Evaluate/fold-real.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
11 namespace Fortran::evaluate {
12
13 template <int KIND>
14 Expr<Type<TypeCategory::Real, KIND>> FoldIntrinsicFunction(
15 FoldingContext &context,
16 FunctionRef<Type<TypeCategory::Real, KIND>> &&funcRef) {
17 using T = Type<TypeCategory::Real, KIND>;
18 using ComplexT = Type<TypeCategory::Complex, KIND>;
19 ActualArguments &args{funcRef.arguments()};
20 auto *intrinsic{std::get_if<SpecificIntrinsic>(&funcRef.proc().u)};
21 CHECK(intrinsic);
22 std::string name{intrinsic->name};
23 if (name == "acos" || name == "acosh" || name == "asin" || name == "asinh" ||
24 (name == "atan" && args.size() == 1) || name == "atanh" ||
25 name == "bessel_j0" || name == "bessel_j1" || name == "bessel_y0" ||
26 name == "bessel_y1" || name == "cos" || name == "cosh" || name == "erf" ||
27 name == "erfc" || name == "erfc_scaled" || name == "exp" ||
28 name == "gamma" || name == "log" || name == "log10" ||
29 name == "log_gamma" || name == "sin" || name == "sinh" ||
30 name == "sqrt" || name == "tan" || name == "tanh") {
31 CHECK(args.size() == 1);
32 if (auto callable{context.hostIntrinsicsLibrary()
33 .GetHostProcedureWrapper<Scalar, T, T>(name)}) {
34 return FoldElementalIntrinsic<T, T>(
35 context, std::move(funcRef), *callable);
36 } else {
37 context.messages().Say(
38 "%s(real(kind=%d)) cannot be folded on host"_en_US, name, KIND);
39 }
40 } else if (name == "atan" || name == "atan2" || name == "hypot" ||
41 name == "mod") {
42 std::string localName{name == "atan2" ? "atan" : name};
43 CHECK(args.size() == 2);
44 if (auto callable{
45 context.hostIntrinsicsLibrary()
46 .GetHostProcedureWrapper<Scalar, T, T, T>(localName)}) {
47 return FoldElementalIntrinsic<T, T, T>(
48 context, std::move(funcRef), *callable);
49 } else {
50 context.messages().Say(
51 "%s(real(kind=%d), real(kind%d)) cannot be folded on host"_en_US,
52 name, KIND, KIND);
53 }
54 } else if (name == "bessel_jn" || name == "bessel_yn") {
55 if (args.size() == 2) { // elemental
56 // runtime functions use int arg
57 using Int4 = Type<TypeCategory::Integer, 4>;
58 if (auto callable{
59 context.hostIntrinsicsLibrary()
60 .GetHostProcedureWrapper<Scalar, T, Int4, T>(name)}) {
61 return FoldElementalIntrinsic<T, Int4, T>(
62 context, std::move(funcRef), *callable);
63 } else {
64 context.messages().Say(
65 "%s(integer(kind=4), real(kind=%d)) cannot be folded on host"_en_US,
66 name, KIND);
67 }
68 }
69 } else if (name == "abs") {
70 // Argument can be complex or real
71 if (auto *x{UnwrapExpr<Expr<SomeReal>>(args[0])}) {
72 return FoldElementalIntrinsic<T, T>(
73 context, std::move(funcRef), &Scalar<T>::ABS);
74 } else if (auto *z{UnwrapExpr<Expr<SomeComplex>>(args[0])}) {
75 if (auto callable{
76 context.hostIntrinsicsLibrary()
77 .GetHostProcedureWrapper<Scalar, T, ComplexT>("abs")}) {
78 return FoldElementalIntrinsic<T, ComplexT>(
79 context, std::move(funcRef), *callable);
80 } else {
81 context.messages().Say(
82 "abs(complex(kind=%d)) cannot be folded on host"_en_US, KIND);
83 }
84 } else {
85 common::die(" unexpected argument type inside abs");
86 }
87 } else if (name == "aimag") {
88 return FoldElementalIntrinsic<T, ComplexT>(
89 context, std::move(funcRef), &Scalar<ComplexT>::AIMAG);
90 } else if (name == "aint" || name == "anint") {
91 // ANINT rounds ties away from zero, not to even
92 common::RoundingMode mode{name == "aint"
93 ? common::RoundingMode::ToZero
94 : common::RoundingMode::TiesAwayFromZero};
95 return FoldElementalIntrinsic<T, T>(context, std::move(funcRef),
96 ScalarFunc<T, T>([&name, &context, mode](
97 const Scalar<T> &x) -> Scalar<T> {
98 ValueWithRealFlags<Scalar<T>> y{x.ToWholeNumber(mode)};
99 if (y.flags.test(RealFlag::Overflow)) {
100 context.messages().Say("%s intrinsic folding overflow"_en_US, name);
101 }
102 return y.value;
103 }));
104 } else if (name == "dprod") {
105 if (auto scalars{GetScalarConstantArguments<T, T>(context, args)}) {
106 return Fold(context,
107 Expr<T>{Multiply<T>{
108 Expr<T>{std::get<0>(*scalars)}, Expr<T>{std::get<1>(*scalars)}}});
109 }
110 } else if (name == "epsilon") {
111 return Expr<T>{Scalar<T>::EPSILON()};
112 } else if (name == "huge") {
113 return Expr<T>{Scalar<T>::HUGE()};
114 } else if (name == "max") {
115 return FoldMINorMAX(context, std::move(funcRef), Ordering::Greater);
116 } else if (name == "merge") {
117 return FoldMerge<T>(context, std::move(funcRef));
118 } else if (name == "min") {
119 return FoldMINorMAX(context, std::move(funcRef), Ordering::Less);
120 } else if (name == "real") {
121 if (auto *expr{args[0].value().UnwrapExpr()}) {
122 return ToReal<KIND>(context, std::move(*expr));
123 }
124 } else if (name == "sign") {
125 return FoldElementalIntrinsic<T, T, T>(
126 context, std::move(funcRef), &Scalar<T>::SIGN);
127 } else if (name == "tiny") {
128 return Expr<T>{Scalar<T>::TINY()};
129 }
130 // TODO: cshift, dim, dot_product, eoshift, fraction, matmul,
131 // maxval, minval, modulo, nearest, norm2, pack, product,
132 // reduce, rrspacing, scale, set_exponent, spacing, spread,
133 // sum, transfer, transpose, unpack, bessel_jn (transformational) and
134 // bessel_yn (transformational)
135 return Expr<T>{std::move(funcRef)};
136 }
137
138 template <int KIND>
139 Expr<Type<TypeCategory::Real, KIND>> FoldOperation(
140 FoldingContext &context, ComplexComponent<KIND> &&x) {
141 using Operand = Type<TypeCategory::Complex, KIND>;
142 using Result = Type<TypeCategory::Real, KIND>;
143 if (auto array{ApplyElementwise(context, x,
144 std::function<Expr<Result>(Expr<Operand> &&)>{
145 [=](Expr<Operand> &&operand) {
146 return Expr<Result>{ComplexComponent<KIND>{
147 x.isImaginaryPart, std::move(operand)}};
148 }})}) {
149 return *array;
150 }
151 using Part = Type<TypeCategory::Real, KIND>;
152 auto &operand{x.left()};
153 if (auto value{GetScalarConstantValue<Operand>(operand)}) {
154 if (x.isImaginaryPart) {
155 return Expr<Part>{Constant<Part>{value->AIMAG()}};
156 } else {
157 return Expr<Part>{Constant<Part>{value->REAL()}};
158 }
159 }
160 return Expr<Part>{std::move(x)};
161 }
162
163 FOR_EACH_REAL_KIND(template class ExpressionBase, )
164 template class ExpressionBase<SomeReal>;
165 } // namespace Fortran::evaluate