Mercurial > hg > graal-jvmci-8
comparison graal/Compiler/src/com/sun/c1x/util/Util.java @ 2507:9ec15d6914ca
Pull over of compiler from maxine repository.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:43:22 +0200 |
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2506:4a3bf8a5bf41 | 2507:9ec15d6914ca |
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1 /* | |
2 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 */ | |
23 package com.sun.c1x.util; | |
24 | |
25 import java.util.*; | |
26 | |
27 import com.sun.c1x.*; | |
28 import com.sun.c1x.debug.*; | |
29 import com.sun.c1x.ir.*; | |
30 import com.sun.cri.ci.*; | |
31 import com.sun.cri.ri.*; | |
32 | |
33 /** | |
34 * The {@code Util} class contains a motley collection of utility methods used throughout the compiler. | |
35 * | |
36 * @author Ben L. Titzer | |
37 * @author Doug Simon | |
38 */ | |
39 public class Util { | |
40 | |
41 public static final int PRINTING_LINE_WIDTH = 40; | |
42 public static final char SECTION_CHARACTER = '*'; | |
43 public static final char SUB_SECTION_CHARACTER = '='; | |
44 public static final char SEPERATOR_CHARACTER = '-'; | |
45 | |
46 public static RuntimeException unimplemented() { | |
47 throw new InternalError("unimplemented"); | |
48 } | |
49 | |
50 public static RuntimeException unimplemented(String msg) { | |
51 throw new InternalError("unimplemented:" + msg); | |
52 } | |
53 | |
54 public static RuntimeException shouldNotReachHere() { | |
55 throw new InternalError("should not reach here"); | |
56 } | |
57 | |
58 public static RuntimeException shouldNotReachHere(String msg) { | |
59 throw new InternalError("Should not reach here: " + msg); | |
60 } | |
61 | |
62 public static <T> boolean replaceInList(T a, T b, List<T> list) { | |
63 final int max = list.size(); | |
64 for (int i = 0; i < max; i++) { | |
65 if (list.get(i) == a) { | |
66 list.set(i, b); | |
67 return true; | |
68 } | |
69 } | |
70 return false; | |
71 } | |
72 | |
73 public static <T> boolean replaceAllInList(T a, T b, List<T> list) { | |
74 final int max = list.size(); | |
75 for (int i = 0; i < max; i++) { | |
76 if (list.get(i) == a) { | |
77 list.set(i, b); | |
78 } | |
79 } | |
80 return false; | |
81 } | |
82 | |
83 /** | |
84 * Statically cast an object to an arbitrary Object type. Dynamically checked. | |
85 */ | |
86 @SuppressWarnings("unchecked") | |
87 public static <T> T uncheckedCast(Class<T> type, Object object) { | |
88 return (T) object; | |
89 } | |
90 | |
91 /** | |
92 * Statically cast an object to an arbitrary Object type. Dynamically checked. | |
93 */ | |
94 @SuppressWarnings("unchecked") | |
95 public static <T> T uncheckedCast(Object object) { | |
96 return (T) object; | |
97 } | |
98 | |
99 /** | |
100 * Utility method to combine a base hash with the identity hash of one or more objects. | |
101 * | |
102 * @param hash the base hash | |
103 * @param x the object to add to the hash | |
104 * @return the combined hash | |
105 */ | |
106 public static int hash1(int hash, Object x) { | |
107 // always set at least one bit in case the hash wraps to zero | |
108 return 0x10000000 | (hash + 7 * System.identityHashCode(x)); | |
109 } | |
110 | |
111 /** | |
112 * Utility method to combine a base hash with the identity hash of one or more objects. | |
113 * | |
114 * @param hash the base hash | |
115 * @param x the first object to add to the hash | |
116 * @param y the second object to add to the hash | |
117 * @return the combined hash | |
118 */ | |
119 public static int hash2(int hash, Object x, Object y) { | |
120 // always set at least one bit in case the hash wraps to zero | |
121 return 0x20000000 | (hash + 7 * System.identityHashCode(x) + 11 * System.identityHashCode(y)); | |
122 } | |
123 | |
124 /** | |
125 * Utility method to combine a base hash with the identity hash of one or more objects. | |
126 * | |
127 * @param hash the base hash | |
128 * @param x the first object to add to the hash | |
129 * @param y the second object to add to the hash | |
130 * @param z the third object to add to the hash | |
131 * @return the combined hash | |
132 */ | |
133 public static int hash3(int hash, Object x, Object y, Object z) { | |
134 // always set at least one bit in case the hash wraps to zero | |
135 return 0x30000000 | (hash + 7 * System.identityHashCode(x) + 11 * System.identityHashCode(y) + 13 * System.identityHashCode(z)); | |
136 } | |
137 | |
138 /** | |
139 * Utility method to combine a base hash with the identity hash of one or more objects. | |
140 * | |
141 * @param hash the base hash | |
142 * @param x the first object to add to the hash | |
143 * @param y the second object to add to the hash | |
144 * @param z the third object to add to the hash | |
145 * @param w the fourth object to add to the hash | |
146 * @return the combined hash | |
147 */ | |
148 public static int hash4(int hash, Object x, Object y, Object z, Object w) { | |
149 // always set at least one bit in case the hash wraps to zero | |
150 return 0x40000000 | (hash + 7 * System.identityHashCode(x) + 11 * System.identityHashCode(y) + 13 * System.identityHashCode(z) + 17 * System.identityHashCode(w)); | |
151 } | |
152 | |
153 static { | |
154 assert CiUtil.log2(2) == 1; | |
155 assert CiUtil.log2(4) == 2; | |
156 assert CiUtil.log2(8) == 3; | |
157 assert CiUtil.log2(16) == 4; | |
158 assert CiUtil.log2(32) == 5; | |
159 assert CiUtil.log2(0x40000000) == 30; | |
160 | |
161 assert CiUtil.log2(2L) == 1; | |
162 assert CiUtil.log2(4L) == 2; | |
163 assert CiUtil.log2(8L) == 3; | |
164 assert CiUtil.log2(16L) == 4; | |
165 assert CiUtil.log2(32L) == 5; | |
166 assert CiUtil.log2(0x4000000000000000L) == 62; | |
167 | |
168 assert !CiUtil.isPowerOf2(3); | |
169 assert !CiUtil.isPowerOf2(5); | |
170 assert !CiUtil.isPowerOf2(7); | |
171 assert !CiUtil.isPowerOf2(-1); | |
172 | |
173 assert CiUtil.isPowerOf2(2); | |
174 assert CiUtil.isPowerOf2(4); | |
175 assert CiUtil.isPowerOf2(8); | |
176 assert CiUtil.isPowerOf2(16); | |
177 assert CiUtil.isPowerOf2(32); | |
178 assert CiUtil.isPowerOf2(64); | |
179 } | |
180 | |
181 /** | |
182 * Sets the element at a given position of a list and ensures that this position exists. If the list is current | |
183 * shorter than the position, intermediate positions are filled with a given value. | |
184 * | |
185 * @param list the list to put the element into | |
186 * @param pos the position at which to insert the element | |
187 * @param x the element that should be inserted | |
188 * @param filler the filler element that is used for the intermediate positions in case the list is shorter than pos | |
189 */ | |
190 public static <T> void atPutGrow(List<T> list, int pos, T x, T filler) { | |
191 if (list.size() < pos + 1) { | |
192 while (list.size() < pos + 1) { | |
193 list.add(filler); | |
194 } | |
195 assert list.size() == pos + 1; | |
196 } | |
197 | |
198 assert list.size() >= pos + 1; | |
199 list.set(pos, x); | |
200 } | |
201 | |
202 public static void breakpoint() { | |
203 // do nothing. | |
204 } | |
205 | |
206 public static void guarantee(boolean b, String string) { | |
207 if (!b) { | |
208 throw new CiBailout(string); | |
209 } | |
210 } | |
211 | |
212 public static void warning(String string) { | |
213 TTY.println("WARNING: " + string); | |
214 } | |
215 | |
216 public static int safeToInt(long l) { | |
217 assert (int) l == l; | |
218 return (int) l; | |
219 } | |
220 | |
221 public static int roundUp(int number, int mod) { | |
222 return ((number + mod - 1) / mod) * mod; | |
223 } | |
224 | |
225 public static void truncate(List<?> list, int length) { | |
226 while (list.size() > length) { | |
227 list.remove(list.size() - 1); | |
228 } | |
229 } | |
230 | |
231 public static void printSection(String name, char sectionCharacter) { | |
232 | |
233 String header = " " + name + " "; | |
234 int remainingCharacters = PRINTING_LINE_WIDTH - header.length(); | |
235 int leftPart = remainingCharacters / 2; | |
236 int rightPart = remainingCharacters - leftPart; | |
237 for (int i = 0; i < leftPart; i++) { | |
238 TTY.print(sectionCharacter); | |
239 } | |
240 | |
241 TTY.print(header); | |
242 | |
243 for (int i = 0; i < rightPart; i++) { | |
244 TTY.print(sectionCharacter); | |
245 } | |
246 | |
247 TTY.println(); | |
248 } | |
249 | |
250 /** | |
251 * Prints entries in a byte array as space separated hex values to {@link TTY}. | |
252 * | |
253 * @param address an address at which the bytes are located. This is used to print an address prefix per line of output. | |
254 * @param array the array containing all the bytes to print | |
255 * @param bytesPerLine the number of values to print per line of output | |
256 */ | |
257 public static void printBytes(long address, byte[] array, int bytesPerLine) { | |
258 printBytes(address, array, 0, array.length, bytesPerLine); | |
259 } | |
260 | |
261 /** | |
262 * Prints entries in a byte array as space separated hex values to {@link TTY}. | |
263 * | |
264 * @param address an address at which the bytes are located. This is used to print an address prefix per line of output. | |
265 * @param array the array containing the bytes to print | |
266 * @param offset the offset in {@code array} of the values to print | |
267 * @param length the number of values from {@code array} print | |
268 * @param bytesPerLine the number of values to print per line of output | |
269 */ | |
270 public static void printBytes(long address, byte[] array, int offset, int length, int bytesPerLine) { | |
271 assert bytesPerLine > 0; | |
272 boolean newLine = true; | |
273 for (int i = 0; i < length; i++) { | |
274 if (newLine) { | |
275 TTY.print("%08x: ", address + i); | |
276 newLine = false; | |
277 } | |
278 TTY.print("%02x ", array[i]); | |
279 if (i % bytesPerLine == bytesPerLine - 1) { | |
280 TTY.println(); | |
281 newLine = true; | |
282 } | |
283 } | |
284 | |
285 if (length % bytesPerLine != bytesPerLine) { | |
286 TTY.println(); | |
287 } | |
288 } | |
289 | |
290 public static CiKind[] signatureToKinds(RiSignature signature, CiKind receiverKind) { | |
291 int args = signature.argumentCount(false); | |
292 CiKind[] result; | |
293 int i = 0; | |
294 if (receiverKind != null) { | |
295 result = new CiKind[args + 1]; | |
296 result[0] = receiverKind; | |
297 i = 1; | |
298 } else { | |
299 result = new CiKind[args]; | |
300 } | |
301 for (int j = 0; j < args; j++) { | |
302 result[i + j] = signature.argumentKindAt(j); | |
303 } | |
304 return result; | |
305 } | |
306 | |
307 public static <T> T nonFatalUnimplemented(T val) { | |
308 if (C1XOptions.FatalUnimplemented) { | |
309 throw new Error("unimplemented"); | |
310 } | |
311 return val; | |
312 } | |
313 | |
314 public static void nonFatalUnimplemented() { | |
315 if (C1XOptions.FatalUnimplemented) { | |
316 throw new Error("unimplemented"); | |
317 } | |
318 } | |
319 | |
320 public static boolean isShiftCount(int x) { | |
321 return 0 <= x && x < 32; | |
322 } | |
323 | |
324 /** | |
325 * Determines if a given {@code int} value is the range of unsigned byte values. | |
326 */ | |
327 public static boolean isUByte(int x) { | |
328 return (x & 0xff) == x; | |
329 } | |
330 | |
331 /** | |
332 * Determines if a given {@code int} value is the range of signed byte values. | |
333 */ | |
334 public static boolean isByte(int x) { | |
335 return (byte) x == x; | |
336 } | |
337 | |
338 /** | |
339 * Determines if a given {@code long} value is the range of unsigned byte values. | |
340 */ | |
341 public static boolean isUByte(long x) { | |
342 return (x & 0xffL) == x; | |
343 } | |
344 | |
345 /** | |
346 * Determines if a given {@code long} value is the range of signed byte values. | |
347 */ | |
348 public static boolean isByte(long l) { | |
349 return (byte) l == l; | |
350 } | |
351 | |
352 /** | |
353 * Determines if a given {@code long} value is the range of unsigned int values. | |
354 */ | |
355 public static boolean isUInt(long x) { | |
356 return (x & 0xffffffffL) == x; | |
357 } | |
358 | |
359 /** | |
360 * Determines if a given {@code long} value is the range of signed int values. | |
361 */ | |
362 public static boolean isInt(long l) { | |
363 return (int) l == l; | |
364 } | |
365 /** | |
366 * Determines if a given {@code int} value is the range of signed short values. | |
367 */ | |
368 public static boolean isShort(int x) { | |
369 return (short) x == x; | |
370 } | |
371 | |
372 public static boolean is32bit(long x) { | |
373 return -0x80000000L <= x && x < 0x80000000L; | |
374 } | |
375 | |
376 public static short safeToShort(int v) { | |
377 assert isShort(v); | |
378 return (short) v; | |
379 } | |
380 | |
381 /** | |
382 * Determines if the kinds of two given IR nodes are equal at the {@linkplain #archKind(CiKind) architecture} | |
383 * level in the context of the {@linkplain C1XCompilation#compilation()} compilation. | |
384 */ | |
385 public static boolean archKindsEqual(Value i, Value other) { | |
386 return archKindsEqual(i.kind, other.kind); | |
387 } | |
388 | |
389 /** | |
390 * Determines if two given kinds are equal at the {@linkplain #archKind(CiKind) architecture} level | |
391 * in the context of the {@linkplain C1XCompilation#compilation()} compilation. | |
392 */ | |
393 public static boolean archKindsEqual(CiKind k1, CiKind k2) { | |
394 C1XCompilation compilation = C1XCompilation.compilation(); | |
395 assert compilation != null : "missing compilation context"; | |
396 return compilation.archKindsEqual(k1, k2); | |
397 } | |
398 | |
399 /** | |
400 * Translates a given kind to a {@linkplain C1XCompilation#archKind(CiKind) canonical architecture} | |
401 * kind in the context of the {@linkplain C1XCompilation#compilation() current} compilation. | |
402 */ | |
403 public static CiKind archKind(CiKind kind) { | |
404 C1XCompilation compilation = C1XCompilation.compilation(); | |
405 assert compilation != null : "missing compilation context"; | |
406 return compilation.archKind(kind); | |
407 } | |
408 | |
409 | |
410 /** | |
411 * Checks that two instructions are equivalent, optionally comparing constants. | |
412 * @param x the first instruction | |
413 * @param y the second instruction | |
414 * @param compareConstants {@code true} if equivalent constants should be considered equivalent | |
415 * @return {@code true} if the instructions are equivalent; {@code false} otherwise | |
416 */ | |
417 public static boolean equivalent(Instruction x, Instruction y, boolean compareConstants) { | |
418 if (x == y) { | |
419 return true; | |
420 } | |
421 if (compareConstants && x != null && y != null) { | |
422 if (x.isConstant() && x.asConstant().equivalent(y.asConstant())) { | |
423 return true; | |
424 } | |
425 } | |
426 return false; | |
427 } | |
428 | |
429 /** | |
430 * Converts a given instruction to a value string. The representation of an instruction as | |
431 * a value is formed by concatenating the {@linkplain com.sun.cri.ci.CiKind#typeChar character} denoting its | |
432 * {@linkplain Value#kind kind} and its {@linkplain Value#id()}. For example, {@code "i13"}. | |
433 * | |
434 * @param value the instruction to convert to a value string. If {@code value == null}, then "-" is returned. | |
435 * @return the instruction representation as a string | |
436 */ | |
437 public static String valueString(Value value) { | |
438 return value == null ? "-" : "" + value.kind.typeChar + value.id(); | |
439 } | |
440 } |