1 /*
2 * Copyright (c) 2012, 2015, 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 org.graalvm.compiler.nodes.test;
24
25 import static org.graalvm.compiler.core.test.GraalCompilerTest.getInitialOptions;
26 import static org.junit.Assert.assertEquals;
27 import static org.junit.Assert.assertFalse;
28 import jdk.vm.ci.meta.JavaConstant;
29 import jdk.vm.ci.meta.JavaKind;
30
31 import org.junit.Before;
32 import org.junit.Test;
33
34 import org.graalvm.compiler.core.common.type.ArithmeticOpTable.IntegerConvertOp;
35 import org.graalvm.compiler.core.common.type.ArithmeticOpTable.ShiftOp;
36 import org.graalvm.compiler.core.common.type.IntegerStamp;
37 import org.graalvm.compiler.core.common.type.Stamp;
38 import org.graalvm.compiler.core.common.type.StampFactory;
39 import org.graalvm.compiler.nodes.ConstantNode;
40 import org.graalvm.compiler.nodes.StructuredGraph;
41 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
42
43 /**
44 * This class tests that integer stamps are created correctly for constants.
45 */
46 public class IntegerStampTest {
47
48 private StructuredGraph graph;
49
50 private static Stamp addIntStamp(Stamp a, Stamp b) {
51 return IntegerStamp.OPS.getAdd().foldStamp(a, b);
52 }
53
54 @Before
55 public void before() {
56 graph = new StructuredGraph.Builder(getInitialOptions(), AllowAssumptions.YES).build();
57 }
58
59 @Test
60 public void testBooleanConstant() {
61 assertEquals(IntegerStamp.create(32, 1, 1, 0x1, 0x1), ConstantNode.forBoolean(true, graph).stamp());
62 assertEquals(IntegerStamp.create(32, 0, 0, 0x0, 0x0), ConstantNode.forBoolean(false, graph).stamp());
63 }
64
65 @Test
66 public void testByteConstant() {
67 assertEquals(IntegerStamp.create(32, 0, 0, 0x0, 0x0), ConstantNode.forByte((byte) 0, graph).stamp());
68 assertEquals(IntegerStamp.create(32, 16, 16, 0x10, 0x10), ConstantNode.forByte((byte) 16, graph).stamp());
69 assertEquals(IntegerStamp.create(32, -16, -16, 0xfffffff0L, 0xfffffff0L), ConstantNode.forByte((byte) -16, graph).stamp());
70 assertEquals(IntegerStamp.create(32, 127, 127, 0x7f, 0x7f), ConstantNode.forByte((byte) 127, graph).stamp());
71 assertEquals(IntegerStamp.create(32, -128, -128, 0xffffff80L, 0xffffff80L), ConstantNode.forByte((byte) -128, graph).stamp());
72 }
73
74 @Test
75 public void testShortConstant() {
76 assertEquals(IntegerStamp.create(32, 0, 0, 0x0, 0x0), ConstantNode.forShort((short) 0, graph).stamp());
77 assertEquals(IntegerStamp.create(32, 128, 128, 0x80, 0x80), ConstantNode.forShort((short) 128, graph).stamp());
78 assertEquals(IntegerStamp.create(32, -128, -128, 0xffffff80L, 0xffffff80L), ConstantNode.forShort((short) -128, graph).stamp());
79 assertEquals(IntegerStamp.create(32, 32767, 32767, 0x7fff, 0x7fff), ConstantNode.forShort((short) 32767, graph).stamp());
80 assertEquals(IntegerStamp.create(32, -32768, -32768, 0xffff8000L, 0xffff8000L), ConstantNode.forShort((short) -32768, graph).stamp());
81 }
82
83 @Test
84 public void testCharConstant() {
85 assertEquals(IntegerStamp.create(32, 0, 0, 0x0, 0x0), ConstantNode.forChar((char) 0, graph).stamp());
86 assertEquals(IntegerStamp.create(32, 'A', 'A', 'A', 'A'), ConstantNode.forChar('A', graph).stamp());
87 assertEquals(IntegerStamp.create(32, 128, 128, 0x80, 0x80), ConstantNode.forChar((char) 128, graph).stamp());
88 assertEquals(IntegerStamp.create(32, 65535, 65535, 0xffff, 0xffff), ConstantNode.forChar((char) 65535, graph).stamp());
89 }
90
91 @Test
92 public void testIntConstant() {
93 assertEquals(IntegerStamp.create(32, 0, 0, 0x0, 0x0), ConstantNode.forInt(0, graph).stamp());
94 assertEquals(IntegerStamp.create(32, 128, 128, 0x80, 0x80), ConstantNode.forInt(128, graph).stamp());
95 assertEquals(IntegerStamp.create(32, -128, -128, 0xffffff80L, 0xffffff80L), ConstantNode.forInt(-128, graph).stamp());
96 assertEquals(IntegerStamp.create(32, Integer.MAX_VALUE, Integer.MAX_VALUE, 0x7fffffff, 0x7fffffff), ConstantNode.forInt(Integer.MAX_VALUE, graph).stamp());
97 assertEquals(IntegerStamp.create(32, Integer.MIN_VALUE, Integer.MIN_VALUE, 0x80000000L, 0x80000000L), ConstantNode.forInt(Integer.MIN_VALUE, graph).stamp());
98 }
99
100 @Test
101 public void testLongConstant() {
102 assertEquals(IntegerStamp.create(64, 0, 0, 0x0, 0x0), ConstantNode.forLong(0, graph).stamp());
103 assertEquals(IntegerStamp.create(64, 128, 128, 0x80, 0x80), ConstantNode.forLong(128, graph).stamp());
104 assertEquals(IntegerStamp.create(64, -128, -128, 0xffffffffffffff80L, 0xffffffffffffff80L), ConstantNode.forLong(-128, graph).stamp());
105 assertEquals(IntegerStamp.create(64, Long.MAX_VALUE, Long.MAX_VALUE, 0x7fffffffffffffffL, 0x7fffffffffffffffL), ConstantNode.forLong(Long.MAX_VALUE, graph).stamp());
106 assertEquals(IntegerStamp.create(64, Long.MIN_VALUE, Long.MIN_VALUE, 0x8000000000000000L, 0x8000000000000000L), ConstantNode.forLong(Long.MIN_VALUE, graph).stamp());
107 }
108
109 @Test
110 public void testPositiveRanges() {
111 assertEquals(IntegerStamp.create(32, 0, 0, 0, 0), StampFactory.forInteger(JavaKind.Int, 0, 0));
112 assertEquals(IntegerStamp.create(32, 0, 1, 0, 1), StampFactory.forInteger(JavaKind.Int, 0, 1));
113 assertEquals(IntegerStamp.create(32, 0, 0x123, 0, 0x1ff), StampFactory.forInteger(JavaKind.Int, 0, 0x123));
114 assertEquals(IntegerStamp.create(32, 0x120, 0x123, 0x120, 0x123), StampFactory.forInteger(JavaKind.Int, 0x120, 0x123));
115 assertEquals(IntegerStamp.create(32, 10000, 15000, 0x2000, 0x3fff), StampFactory.forInteger(JavaKind.Int, 10000, 15000));
116 assertEquals(IntegerStamp.create(64, 0, 1, 0, 1), StampFactory.forInteger(JavaKind.Long, 0, 1));
117 assertEquals(IntegerStamp.create(64, 10000, 15000, 0x2000, 0x3fff), StampFactory.forInteger(JavaKind.Long, 10000, 15000));
118 assertEquals(IntegerStamp.create(64, 140000000000L, 150000000000L, 0x2000000000L, 0x23ffffffffL), StampFactory.forInteger(JavaKind.Long, 140000000000L, 150000000000L));
119 }
120
121 @Test
122 public void testNegativeRanges() {
123 assertEquals(IntegerStamp.create(32, -2, -1, 0xfffffffeL, 0xffffffffL), StampFactory.forInteger(JavaKind.Int, -2, -1));
124 assertEquals(IntegerStamp.create(32, -20, -10, 0xffffffe0L, 0xffffffffL), StampFactory.forInteger(JavaKind.Int, -20, -10));
125 assertEquals(IntegerStamp.create(32, -10000, 0, 0, 0xffffffffL), StampFactory.forInteger(JavaKind.Int, -10000, 0));
126 assertEquals(IntegerStamp.create(32, -10000, -1, 0xffffc000L, 0xffffffffL), StampFactory.forInteger(JavaKind.Int, -10000, -1));
127 assertEquals(IntegerStamp.create(32, -10010, -10000, 0xffffd8e0L, 0xffffd8ffL), StampFactory.forInteger(JavaKind.Int, -10010, -10000));
128 assertEquals(IntegerStamp.create(64, -2, -1, 0xfffffffffffffffeL, 0xffffffffffffffffL), StampFactory.forInteger(JavaKind.Long, -2, -1));
129 assertEquals(IntegerStamp.create(64, -10010, -10000, 0xffffffffffffd8e0L, 0xffffffffffffd8ffL), StampFactory.forInteger(JavaKind.Long, -10010, -10000));
130 assertEquals(IntegerStamp.create(64, -150000000000L, -140000000000L, 0xffffffdc00000000L, 0xffffffdfffffffffL), StampFactory.forInteger(JavaKind.Long, -150000000000L, -140000000000L));
131 }
132
133 @Test
134 public void testMixedRanges() {
135 assertEquals(IntegerStamp.create(32, -1, 0, 0, 0xffffffffL), StampFactory.forInteger(JavaKind.Int, -1, 0));
136 assertEquals(IntegerStamp.create(32, -10000, 1000, 0, 0xffffffffL), StampFactory.forInteger(JavaKind.Int, -10000, 1000));
137 assertEquals(IntegerStamp.create(64, -10000, 1000, 0, 0xffffffffffffffffL), StampFactory.forInteger(JavaKind.Long, -10000, 1000));
138 }
139
140 private static Stamp narrowingKindConversion(IntegerStamp stamp, JavaKind kind) {
141 Stamp narrow = IntegerStamp.OPS.getNarrow().foldStamp(stamp.getBits(), kind.getBitCount(), stamp);
142 IntegerConvertOp<?> implicitExtend = kind.isUnsigned() ? IntegerStamp.OPS.getZeroExtend() : IntegerStamp.OPS.getSignExtend();
143 return implicitExtend.foldStamp(kind.getBitCount(), 32, narrow);
144 }
145
146 @Test
147 public void testNarrowingConversions() {
148 // byte cases
149 assertEquals(StampFactory.forInteger(JavaKind.Int, 0, 0), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 0, 0), JavaKind.Byte));
150 assertEquals(StampFactory.forInteger(JavaKind.Int, 0, 10), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 0, 10), JavaKind.Byte));
151 assertEquals(StampFactory.forInteger(JavaKind.Int, 10, 20), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 10, 20), JavaKind.Byte));
152 assertEquals(StampFactory.forInteger(JavaKind.Int, -10, 0), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, -10, 0), JavaKind.Byte));
153 assertEquals(StampFactory.forInteger(JavaKind.Int, -20, -10), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, -20, -10), JavaKind.Byte));
154 assertEquals(StampFactory.forInteger(JavaKind.Int, Byte.MIN_VALUE, Byte.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 100, 200), JavaKind.Byte));
155 assertEquals(StampFactory.forInteger(JavaKind.Int, Byte.MIN_VALUE, Byte.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, -100, 200), JavaKind.Byte));
156 assertEquals(StampFactory.forInteger(JavaKind.Int, Byte.MIN_VALUE, Byte.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, -200, -100), JavaKind.Byte));
157 // char cases
158 assertEquals(StampFactory.forInteger(JavaKind.Int, 0, 10), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 0, 10), JavaKind.Char));
159 assertEquals(StampFactory.forInteger(JavaKind.Int, 10, 20), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 10, 20), JavaKind.Char));
160 assertEquals(StampFactory.forInteger(JavaKind.Int, Character.MIN_VALUE, Character.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 20000, 80000), JavaKind.Char));
161 assertEquals(StampFactory.forInteger(JavaKind.Int, Character.MIN_VALUE, Character.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, -10000, 40000), JavaKind.Char));
162 assertEquals(StampFactory.forInteger(JavaKind.Int, Character.MIN_VALUE, Character.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, -40000, -10000), JavaKind.Char));
163 // short cases
164 assertEquals(StampFactory.forInteger(JavaKind.Int, 0, 10), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 0, 10), JavaKind.Short));
165 assertEquals(StampFactory.forInteger(JavaKind.Int, 10, 20), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 10, 20), JavaKind.Short));
166 assertEquals(StampFactory.forInteger(JavaKind.Int, Short.MIN_VALUE, Short.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 20000, 40000), JavaKind.Short));
167 assertEquals(StampFactory.forInteger(JavaKind.Int, Short.MIN_VALUE, Short.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, -10000, 40000), JavaKind.Short));
168 assertEquals(StampFactory.forInteger(JavaKind.Int, Short.MIN_VALUE, Short.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, -40000, -10000), JavaKind.Short));
169 // int cases
170 assertEquals(StampFactory.forInteger(JavaKind.Int, 0, 10), narrowingKindConversion(StampFactory.forInteger(JavaKind.Long, 0, 10), JavaKind.Int));
171 assertEquals(StampFactory.forInteger(JavaKind.Int, 10, 20), narrowingKindConversion(StampFactory.forInteger(JavaKind.Long, 10, 20), JavaKind.Int));
172 assertEquals(StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE, Integer.MAX_VALUE),
173 narrowingKindConversion(StampFactory.forInteger(JavaKind.Long, 20000000000L, 40000000000L), JavaKind.Int));
174 assertEquals(StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE, Integer.MAX_VALUE),
175 narrowingKindConversion(StampFactory.forInteger(JavaKind.Long, -10000000000L, 40000000000L), JavaKind.Int));
176 assertEquals(StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE, Integer.MAX_VALUE),
177 narrowingKindConversion(StampFactory.forInteger(JavaKind.Long, -40000000000L, -10000000000L), JavaKind.Int));
178 }
179
180 @Test
181 public void testMaskBasedNarrowing() {
182 IntegerStamp stamp = IntegerStamp.create(32, 1, 2, 0x2, 0x3);
183 IntegerStamp resultStamp = IntegerStamp.create(32, 2, 2);
184 assertEquals(resultStamp, stamp);
185 }
186
187 @Test
188 public void testJoinWeirdMasks() {
189 IntegerStamp minusOneOrThree = IntegerStamp.create(32, -1, 3, 0x3, 0xFFFFFFFFL);
190 IntegerStamp twoOrThree = IntegerStamp.create(32, 2, 3, 0x2, 0x3);
191 IntegerStamp three = IntegerStamp.create(32, 3, 3, 0x3, 0x3);
192 assertEquals(three, minusOneOrThree.join(twoOrThree));
193
194 IntegerStamp minusOneOrThreeOrOne = IntegerStamp.create(32, -1, 3, 0x1, 0xFFFFFFFFL);
195 assertEquals(three, minusOneOrThreeOrOne.join(twoOrThree));
196
197 IntegerStamp a = IntegerStamp.create(32, 0b101, 0b110, 0b100, 0b111);
198 IntegerStamp b = IntegerStamp.create(32, 0b011, 0b110, 0b010, 0b111);
199
200 // This exercises a special case:
201 // The new lowest bound is max(0b101, 0b011) = 0b101
202 // The new down mask is (0b100 | 0b010) = 0b110
203 // Now based on lowest bound and down mask, we know that the new lowest bound is 0b110
204 // Just making an or with the new down mask would give however (0b110 | 0b101) = 0b111 and
205 // would therefore be wrong.
206 // New upper bound is 0b110.
207
208 IntegerStamp result = IntegerStamp.create(32, 0b110, 0b110, 0b110, 0b110);
209 assertEquals(result, a.join(b));
210 }
211
212 @Test
213 public void testXor() {
214 assertEquals(IntegerStamp.create(32, 0, 0xff, 0, 0xff), IntegerStamp.OPS.getXor().foldStamp(IntegerStamp.create(32, 0, 0, 0, 0), IntegerStamp.create(32, 0, 0xff, 0, 0xff)));
215 assertEquals(IntegerStamp.create(32, 0x10, 0x1f, 0x10, 0x1f), IntegerStamp.OPS.getXor().foldStamp(IntegerStamp.create(32, 0, 0, 0, 0), IntegerStamp.create(32, 0x10, 0x1f, 0x10, 0x1f)));
216 assertEquals(IntegerStamp.create(32, 0x0, 0xf, 0x0, 0xf),
217 IntegerStamp.OPS.getXor().foldStamp(IntegerStamp.create(32, 0x10, 0x10, 0x10, 0x10), IntegerStamp.create(32, 0x10, 0x1f, 0x10, 0x1f)));
218 assertEquals(IntegerStamp.create(32, 0x10, 0x1f, 0x10, 0x1f),
219 IntegerStamp.OPS.getXor().foldStamp(IntegerStamp.create(32, 0x10, 0x10, 0x10, 0x10), IntegerStamp.create(32, 0x0, 0xf, 0x0, 0xf)));
220 }
221
222 @Test
223 public void testNot() {
224 assertEquals(IntegerStamp.create(32, -11, -1, 0xffff_fff0L, 0xffff_ffffL), IntegerStamp.OPS.getNot().foldStamp(IntegerStamp.create(32, 0, 10, 0, 0xf)));
225 }
226
227 @Test
228 public void testAddIntSimple() {
229 assertEquals(StampFactory.forInteger(JavaKind.Int, 0, 30, 0, 31), addIntStamp(StampFactory.forInteger(JavaKind.Int, 0, 10), StampFactory.forInteger(JavaKind.Int, 0, 20)));
230 }
231
232 @Test
233 public void testAddNegativeOverFlowInt1() {
234 assertEquals(StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE, Integer.MAX_VALUE, 0, 0xffff_ffffL),
235 addIntStamp(StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE, 0), StampFactory.forInteger(JavaKind.Int, -1, 0)));
236 }
237
238 @Test
239 public void testAddNegativeOverFlowInt2() {
240 assertEquals(StampFactory.forInteger(JavaKind.Int, Integer.MAX_VALUE - 2, Integer.MAX_VALUE, 0x7fff_fffcL, 0x7fff_ffffL),
241 addIntStamp(StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE, Integer.MIN_VALUE + 1), StampFactory.forInteger(JavaKind.Int, -3, -2)));
242 }
243
244 @Test
245 public void testAddPositiveOverFlowInt1() {
246 assertEquals(StampFactory.forKind(JavaKind.Int), addIntStamp(StampFactory.forInteger(JavaKind.Int, 0, 1), StampFactory.forInteger(JavaKind.Int, 0, Integer.MAX_VALUE)));
247 }
248
249 @Test
250 public void testAddPositiveOverFlowInt2() {
251 assertEquals(StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE, Integer.MIN_VALUE + 2),
252 addIntStamp(StampFactory.forInteger(JavaKind.Int, Integer.MAX_VALUE - 1, Integer.MAX_VALUE), StampFactory.forInteger(JavaKind.Int, 2, 3)));
253 }
254
255 @Test
256 public void testAddOverFlowsInt() {
257 assertEquals(StampFactory.forKind(JavaKind.Int), addIntStamp(StampFactory.forInteger(JavaKind.Int, -1, 1), StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE, Integer.MAX_VALUE)));
258 }
259
260 @Test
261 public void testAddLongSimple() {
262 assertEquals(StampFactory.forInteger(JavaKind.Long, 0, 30, 0, 31), addIntStamp(StampFactory.forInteger(JavaKind.Long, 0, 10), StampFactory.forInteger(JavaKind.Long, 0, 20)));
263 }
264
265 @Test
266 public void testAddNegativOverFlowLong1() {
267 assertEquals(StampFactory.forInteger(JavaKind.Long, Long.MIN_VALUE, Long.MAX_VALUE, 0, 0xffff_ffff_ffff_ffffL),
268 addIntStamp(StampFactory.forInteger(JavaKind.Long, Long.MIN_VALUE, Long.MIN_VALUE + 1), StampFactory.forInteger(JavaKind.Long, Integer.MIN_VALUE, Integer.MAX_VALUE)));
269 }
270
271 @Test
272 public void testAddNegativeOverFlowLong2() {
273 assertEquals(StampFactory.forInteger(JavaKind.Long, Long.MAX_VALUE - 2, Long.MAX_VALUE),
274 addIntStamp(StampFactory.forInteger(JavaKind.Long, Long.MIN_VALUE, Long.MIN_VALUE + 1), StampFactory.forInteger(JavaKind.Long, -3, -2)));
275 }
276
277 @Test
278 public void testAddPositiveOverFlowLong1() {
279 assertEquals(StampFactory.forKind(JavaKind.Long), addIntStamp(StampFactory.forInteger(JavaKind.Long, 0, 1), StampFactory.forInteger(JavaKind.Long, 0, Long.MAX_VALUE)));
280 }
281
282 @Test
283 public void testAddPositiveOverFlowLong2() {
284 assertEquals(StampFactory.forInteger(JavaKind.Long, Long.MIN_VALUE, Long.MIN_VALUE + 2),
285 addIntStamp(StampFactory.forInteger(JavaKind.Long, Long.MAX_VALUE - 1, Long.MAX_VALUE), StampFactory.forInteger(JavaKind.Long, 2, 3)));
286 }
287
288 @Test
289 public void testAddOverFlowsLong() {
290 assertEquals(StampFactory.forKind(JavaKind.Long), addIntStamp(StampFactory.forInteger(JavaKind.Long, -1, 1), StampFactory.forInteger(JavaKind.Long, Long.MIN_VALUE, Long.MAX_VALUE)));
291 }
292
293 @Test
294 public void testAdd1() {
295 assertEquals(StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE + 1, 31 + (Integer.MIN_VALUE + 1)),
296 addIntStamp(StampFactory.forInteger(JavaKind.Int, 0, 31), StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE + 1, Integer.MIN_VALUE + 1)));
297 }
298
299 @Test
300 public void testAdd2() {
301 assertEquals(StampFactory.forInteger(JavaKind.Int, 0x8000_007e, 0x8000_007f, 0x8000_007eL, 0x8000_007fL),
302 addIntStamp(StampFactory.forInteger(JavaKind.Int, 0x7fff_fffe, 0x7fff_ffff, 0x7fff_fffeL, 0x7ffff_fffL), StampFactory.forInteger(JavaKind.Int, 128, 128)));
303 }
304
305 @Test
306 public void testAdd3() {
307 assertEquals(StampFactory.forInteger(JavaKind.Long, Long.MIN_VALUE, Long.MAX_VALUE - 1, 0, 0xffff_ffff_ffff_fffeL),
308 addIntStamp(StampFactory.forInteger(JavaKind.Long, Long.MIN_VALUE, Long.MAX_VALUE - 1, 0, 0xffff_ffff_ffff_fffeL),
309 StampFactory.forInteger(JavaKind.Long, Long.MIN_VALUE, Long.MAX_VALUE - 1, 0, 0xffff_ffff_ffff_fffeL)));
310
311 }
312
313 @Test
314 public void testAnd() {
315 assertEquals(IntegerStamp.create(32, Integer.MIN_VALUE, 0x40000000L, 0, 0xc0000000L),
316 IntegerStamp.OPS.getAnd().foldStamp(StampFactory.forKind(JavaKind.Int), StampFactory.forConstant(JavaConstant.forInt(0xc0000000))));
317 }
318
319 private static void testSignExtendShort(long lower, long upper) {
320 Stamp shortStamp = StampFactory.forInteger(16, lower, upper);
321 Stamp intStamp = IntegerStamp.OPS.getSignExtend().foldStamp(16, 32, shortStamp);
322 assertEquals(StampFactory.forInteger(32, lower, upper), intStamp);
323 }
324
325 @Test
326 public void testSignExtend() {
327 testSignExtendShort(5, 7);
328 testSignExtendShort(0, 42);
329 testSignExtendShort(-42, -1);
330 testSignExtendShort(-42, 0);
331 testSignExtendShort(-1, 1);
332 testSignExtendShort(Short.MIN_VALUE, Short.MAX_VALUE);
333 }
334
335 private static void testZeroExtendShort(long lower, long upper, long newLower, long newUpper) {
336 Stamp shortStamp = StampFactory.forInteger(16, lower, upper);
337 Stamp intStamp = IntegerStamp.OPS.getZeroExtend().foldStamp(16, 32, shortStamp);
338 assertEquals(StampFactory.forInteger(32, newLower, newUpper), intStamp);
339 }
340
341 @Test
342 public void testZeroExtend() {
343 testZeroExtendShort(5, 7, 5, 7);
344 testZeroExtendShort(0, 42, 0, 42);
345 testZeroExtendShort(-42, -1, 0xFFFF - 41, 0xFFFF);
346 testZeroExtendShort(-42, 0, 0, 0xFFFF);
347 testZeroExtendShort(-1, 1, 0, 0xFFFF);
348 testZeroExtendShort(Short.MIN_VALUE, Short.MAX_VALUE, 0, 0xFFFF);
349 }
350
351 @Test
352 public void testIllegalJoin() {
353 assertFalse(IntegerStamp.create(32, 0, 0xff00, 0, 0xff00).join(IntegerStamp.create(32, 1, 0xff, 0x00, 0xff)).hasValues());
354 assertFalse(IntegerStamp.create(32, 0x100, 0xff00, 0, 0xff00).join(IntegerStamp.create(32, 0, 0xff, 0x00, 0xff)).hasValues());
355 }
356
357 @Test
358 public void testShiftLeft() {
359 ShiftOp<?> shl = IntegerStamp.OPS.getShl();
360 assertEquals(IntegerStamp.create(32, 0, 0x1ff, 0, 0x1ff), shl.foldStamp(IntegerStamp.create(32, 0, 0xff, 0, 0xff), IntegerStamp.create(32, 0, 1, 0, 1)));
361 assertEquals(IntegerStamp.create(32, 0, 0x1fe0, 0, 0x1fe0), shl.foldStamp(IntegerStamp.create(32, 0, 0xff, 0, 0xff), IntegerStamp.create(32, 5, 5, 5, 5)));
362 assertEquals(IntegerStamp.create(32, 0x1e0, 0x1fe0, 0, 0x1fe0), shl.foldStamp(IntegerStamp.create(32, 0xf, 0xff, 0, 0xff), IntegerStamp.create(32, 5, 5, 5, 5)));
363
364 assertEquals(IntegerStamp.create(64, 0, 0x1ff, 0, 0x1ff), shl.foldStamp(IntegerStamp.create(64, 0, 0xff, 0, 0xff), IntegerStamp.create(32, 0, 1, 0, 1)));
365 assertEquals(IntegerStamp.create(64, 0, 0x1fe0, 0, 0x1fe0), shl.foldStamp(IntegerStamp.create(64, 0, 0xff, 0, 0xff), IntegerStamp.create(32, 5, 5, 5, 5)));
366 assertEquals(IntegerStamp.create(64, 0x1e0, 0x1fe0, 0, 0x1fe0), shl.foldStamp(IntegerStamp.create(64, 0xf, 0xff, 0, 0xff), IntegerStamp.create(32, 5, 5, 5, 5)));
367
368 }
369 }