| 1 | ;;; compiler-types.lisp |
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| 2 | ;;; |
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| 3 | ;;; Copyright (C) 2005-2006 Peter Graves |
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| 4 | ;;; $Id: compiler-types.lisp 15037 2017-06-03 04:35:50Z mevenson $ |
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| 5 | ;;; |
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| 6 | ;;; This program is free software; you can redistribute it and/or |
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| 7 | ;;; modify it under the terms of the GNU General Public License |
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| 8 | ;;; as published by the Free Software Foundation; either version 2 |
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| 9 | ;;; of the License, or (at your option) any later version. |
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| 10 | ;;; |
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| 11 | ;;; This program is distributed in the hope that it will be useful, |
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| 12 | ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | ;;; GNU General Public License for more details. |
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| 15 | ;;; |
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| 16 | ;;; You should have received a copy of the GNU General Public License |
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| 17 | ;;; along with this program; if not, write to the Free Software |
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| 18 | ;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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| 19 | ;;; |
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| 20 | ;;; As a special exception, the copyright holders of this library give you |
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| 21 | ;;; permission to link this library with independent modules to produce an |
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| 22 | ;;; executable, regardless of the license terms of these independent |
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| 23 | ;;; modules, and to copy and distribute the resulting executable under |
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| 24 | ;;; terms of your choice, provided that you also meet, for each linked |
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| 25 | ;;; independent module, the terms and conditions of the license of that |
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| 26 | ;;; module. An independent module is a module which is not derived from |
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| 27 | ;;; or based on this library. If you modify this library, you may extend |
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| 28 | ;;; this exception to your version of the library, but you are not |
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| 29 | ;;; obligated to do so. If you do not wish to do so, delete this |
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| 30 | ;;; exception statement from your version. |
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| 31 | |
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| 32 | ;;; Type information that matters to the compiler. |
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| 33 | |
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| 34 | (in-package #:system) |
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| 35 | |
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| 36 | (export '(+true-type+ |
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| 37 | +false-type+ |
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| 38 | integer-type-low |
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| 39 | integer-type-high |
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| 40 | integer-type-p |
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| 41 | %make-integer-type |
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| 42 | make-integer-type |
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| 43 | +fixnum-type+ |
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| 44 | +integer-type+ |
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| 45 | fixnum-type-p |
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| 46 | fixnum-constant-value |
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| 47 | integer-constant-value |
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| 48 | java-long-type-p |
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| 49 | make-compiler-type |
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| 50 | compiler-subtypep |
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| 51 | function-result-type |
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| 52 | defknown)) |
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| 53 | |
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| 54 | (defstruct constant-type value) |
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| 55 | |
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| 56 | (defconst +true-type+ (make-constant-type :value t)) |
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| 57 | |
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| 58 | (defconst +false-type+ (make-constant-type :value nil)) |
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| 59 | |
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| 60 | (defstruct (integer-type (:constructor %make-integer-type (low high))) |
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| 61 | low |
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| 62 | high) |
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| 63 | |
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| 64 | (defmethod print-object ((type integer-type) stream) |
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| 65 | (print-unreadable-object (type stream :type t :identity t) |
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| 66 | (format stream "~D ~D" (integer-type-low type) (integer-type-high type)))) |
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| 67 | |
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| 68 | (defconstant +fixnum-type+ (%make-integer-type most-negative-fixnum |
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| 69 | most-positive-fixnum)) |
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| 70 | |
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| 71 | (defconstant +integer-type+ (%make-integer-type nil nil)) |
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| 72 | |
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| 73 | (declaim (ftype (function (t) t) make-integer-type)) |
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| 74 | (defun make-integer-type (type) |
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| 75 | (if (integer-type-p type) |
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| 76 | type |
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| 77 | (cond ((eq type 'FIXNUM) |
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| 78 | +fixnum-type+) |
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| 79 | ((eq type 'INTEGER) |
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| 80 | +integer-type+) |
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| 81 | (t |
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| 82 | (setf type (normalize-type type)) |
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| 83 | (when (and (consp type) (eq (%car type) 'INTEGER)) |
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| 84 | (let ((low (second type)) |
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| 85 | (high (third type))) |
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| 86 | (if (eq low '*) |
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| 87 | (setf low nil) |
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| 88 | (when (and (consp low) (integerp (%car low))) |
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| 89 | (setf low (1+ (%car low))))) |
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| 90 | (if (eq high '*) |
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| 91 | (setf high nil) |
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| 92 | (when (and (consp high) (integerp (%car high))) |
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| 93 | (setf high (1- (%car high))))) |
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| 94 | (%make-integer-type low high))))))) |
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| 95 | |
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| 96 | (declaim (ftype (function (t) t) fixnum-type-p)) |
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| 97 | (defun fixnum-type-p (compiler-type) |
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| 98 | (and (integer-type-p compiler-type) |
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| 99 | (fixnump (integer-type-low compiler-type)) |
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| 100 | (fixnump (integer-type-high compiler-type)))) |
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| 101 | |
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| 102 | (declaim (ftype (function (t) t) fixnum-constant-value)) |
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| 103 | (defun fixnum-constant-value (compiler-type) |
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| 104 | (when (and compiler-type (integer-type-p compiler-type)) |
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| 105 | (let ((low (integer-type-low compiler-type)) |
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| 106 | high) |
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| 107 | (when (fixnump low) |
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| 108 | (setf high (integer-type-high compiler-type)) |
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| 109 | (when (and (fixnump high) (= high low)) |
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| 110 | high))))) |
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| 111 | |
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| 112 | (declaim (ftype (function (t) t) integer-constant-value)) |
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| 113 | (defun integer-constant-value (compiler-type) |
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| 114 | (when (and compiler-type (integer-type-p compiler-type)) |
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| 115 | (let ((low (integer-type-low compiler-type)) |
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| 116 | high) |
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| 117 | (when (integerp low) |
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| 118 | (setf high (integer-type-high compiler-type)) |
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| 119 | (when (and (integerp high) (= high low)) |
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| 120 | high))))) |
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| 121 | |
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| 122 | (declaim (ftype (function (t) t) java-long-type-p)) |
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| 123 | (defun java-long-type-p (compiler-type) |
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| 124 | (and (integer-type-p compiler-type) |
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| 125 | (typep (integer-type-low compiler-type) |
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| 126 | (list 'INTEGER most-negative-java-long most-positive-java-long)) |
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| 127 | (typep (integer-type-high compiler-type) |
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| 128 | (list 'INTEGER most-negative-java-long most-positive-java-long)))) |
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| 129 | |
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| 130 | |
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| 131 | (declaim (ftype (function (t t) t) make-union-type)) |
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| 132 | (defun make-union-type (type1 type2) |
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| 133 | (cond ((and (integer-type-p type1) |
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| 134 | (integer-type-p type2)) |
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| 135 | (let ((low1 (integer-type-low type1)) |
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| 136 | (low2 (integer-type-low type2)) |
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| 137 | (high1 (integer-type-high type1)) |
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| 138 | (high2 (integer-type-high type2))) |
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| 139 | (if (and low1 low2 high1 high2) |
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| 140 | (%make-integer-type (min low1 low2) (max high1 high2)) |
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| 141 | +integer-type+))) |
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| 142 | (t |
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| 143 | t))) |
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| 144 | |
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| 145 | (declaim (ftype (function (t) t) make-compiler-type)) |
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| 146 | (defun make-compiler-type (typespec) |
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| 147 | (cond ((integer-type-p typespec) |
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| 148 | typespec) |
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| 149 | ((constant-type-p typespec) |
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| 150 | typespec) |
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| 151 | ((eq typespec 'SINGLE-FLOAT) |
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| 152 | 'SINGLE-FLOAT) |
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| 153 | ((eq typespec 'DOUBLE-FLOAT) |
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| 154 | 'DOUBLE-FLOAT) |
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| 155 | ((and (consp typespec) |
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| 156 | (eq (%car typespec) 'SINGLE-FLOAT)) |
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| 157 | 'SINGLE-FLOAT) |
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| 158 | ((and (consp typespec) |
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| 159 | (eq (%car typespec) 'DOUBLE-FLOAT)) |
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| 160 | 'DOUBLE-FLOAT) |
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| 161 | (t |
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| 162 | (let ((type (normalize-type typespec))) |
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| 163 | (cond ((consp type) |
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| 164 | (let ((car (%car type))) |
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| 165 | (cond ((eq car 'INTEGER) |
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| 166 | (make-integer-type type)) |
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| 167 | ((eq car 'SINGLE-FLOAT) |
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| 168 | 'SINGLE-FLOAT) |
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| 169 | ((eq car 'DOUBLE-FLOAT) |
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| 170 | 'DOUBLE-FLOAT) |
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| 171 | ((memq car '(STRING SIMPLE-STRING LIST)) |
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| 172 | car) |
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| 173 | ((memq car '(VECTOR SIMPLE-VECTOR ARRAY SIMPLE-ARRAY)) |
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| 174 | type) |
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| 175 | ((eq car 'OR) |
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| 176 | (case (length (cdr type)) |
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| 177 | (1 |
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| 178 | (make-compiler-type (second type))) |
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| 179 | (2 |
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| 180 | (make-union-type (make-compiler-type (second type)) |
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| 181 | (make-compiler-type (third type)))) |
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| 182 | (t |
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| 183 | t))) |
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| 184 | ((subtypep type 'FIXNUM) |
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| 185 | +fixnum-type+) |
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| 186 | (t |
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| 187 | t)))) |
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| 188 | ((memq type '(BOOLEAN CHARACTER HASH-TABLE STREAM SYMBOL)) |
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| 189 | type) |
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| 190 | ((eq type 'INTEGER) |
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| 191 | (%make-integer-type nil nil)) |
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| 192 | (t |
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| 193 | t)))))) |
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| 194 | |
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| 195 | (defun integer-type-subtypep (type1 typespec) |
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| 196 | (if (eq typespec 'INTEGER) |
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| 197 | t |
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| 198 | (let ((type2 (make-integer-type typespec))) |
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| 199 | (when type2 |
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| 200 | (let ((low1 (integer-type-low type1)) |
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| 201 | (high1 (integer-type-high type1)) |
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| 202 | (low2 (integer-type-low type2)) |
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| 203 | (high2 (integer-type-high type2))) |
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| 204 | (cond ((and low1 low2 high1 high2) |
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| 205 | (and (>= low1 low2) (<= high1 high2))) |
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| 206 | ((and low1 low2 (< low1 low2)) |
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| 207 | nil) |
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| 208 | ((and high1 high2) (> high1 high2) |
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| 209 | nil) |
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| 210 | ((and (null low1) low2) |
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| 211 | nil) |
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| 212 | ((and (null high1) high2) |
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| 213 | nil) |
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| 214 | (t |
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| 215 | t))))))) |
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| 216 | |
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| 217 | (declaim (ftype (function (t t) t) compiler-subtypep)) |
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| 218 | (defun compiler-subtypep (compiler-type typespec) |
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| 219 | (cond ((eq typespec t) |
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| 220 | t) |
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| 221 | ((eq compiler-type t) |
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| 222 | nil) |
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| 223 | ((eq compiler-type typespec) |
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| 224 | t) |
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| 225 | ((eq typespec 'STRING) |
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| 226 | (eq compiler-type 'SIMPLE-STRING)) |
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| 227 | ((integer-type-p compiler-type) |
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| 228 | (integer-type-subtypep compiler-type typespec)) |
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| 229 | (t |
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| 230 | (values (subtypep compiler-type typespec))))) |
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| 231 | |
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| 232 | (declaim (type hash-table *function-result-types*)) |
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| 233 | (defvar *function-result-types* (make-hash-table :test 'equal)) |
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| 234 | |
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| 235 | (declaim (ftype (function (t) t) function-result-type)) |
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| 236 | (defun function-result-type (name) |
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| 237 | (if (symbolp name) |
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| 238 | (get name 'function-result-type) |
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| 239 | (gethash1 name *function-result-types*))) |
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| 240 | |
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| 241 | (declaim (ftype (function (t t) t) set-function-result-type)) |
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| 242 | (defun set-function-result-type (name result-type) |
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| 243 | (if (symbolp name) |
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| 244 | (setf (get name 'function-result-type) result-type) |
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| 245 | (setf (gethash name *function-result-types*) result-type))) |
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| 246 | |
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| 247 | (defun %defknown (name-or-names argument-types result-type) |
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| 248 | (let ((ftype `(function ,argument-types ,result-type)) |
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| 249 | (result-type (make-compiler-type result-type))) |
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| 250 | (cond ((or (symbolp name-or-names) (setf-function-name-p name-or-names)) |
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| 251 | (proclaim-ftype-1 ftype name-or-names) |
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| 252 | (set-function-result-type name-or-names result-type)) |
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| 253 | (t |
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| 254 | (proclaim-ftype ftype name-or-names) |
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| 255 | (dolist (name name-or-names) |
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| 256 | (set-function-result-type name result-type))))) |
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| 257 | name-or-names) |
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| 258 | |
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| 259 | (defmacro defknown (name-or-names argument-types result-type) |
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| 260 | `(eval-when (:compile-toplevel :load-toplevel :execute) |
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| 261 | (%defknown ',name-or-names ',argument-types ',result-type))) |
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| 262 | |
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| 263 | (provide '#:compiler-types) |
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