Mercurial > hg > truffle
comparison graal/GraalCompiler/src/com/sun/c1x/ir/Value.java @ 2538:e1ba5a93e997
Clean up on Value class and LIRGenerator/LIRItem-related things.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 20:13:54 +0200 |
parents | 4a016ff4d2df |
children | fa3bda50cbfd |
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2537:4a016ff4d2df | 2538:e1ba5a93e997 |
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31 import com.sun.cri.ri.*; | 31 import com.sun.cri.ri.*; |
32 | 32 |
33 /** | 33 /** |
34 * This class represents a value within the HIR graph, including local variables, phis, and | 34 * This class represents a value within the HIR graph, including local variables, phis, and |
35 * all other instructions. | 35 * all other instructions. |
36 * | |
37 * @author Ben L. Titzer | |
38 */ | 36 */ |
39 public abstract class Value { | 37 public abstract class Value { |
40 /** | 38 |
41 * An enumeration of flags on values. | |
42 */ | |
43 public enum Flag { | 39 public enum Flag { |
44 NonNull, // this value is non-null | 40 NonNull, // this value is non-null |
45 | 41 |
46 NoNullCheck, // does not require null check | 42 NoNullCheck, // does not require null check |
47 NoStoreCheck, // does not require store check | 43 NoStoreCheck, // does not require store check |
48 NoBoundsCheck, // does not require bounds check | 44 NoBoundsCheck, // does not require bounds check |
49 NoZeroCheck, // divide or modulus cannot cause exception | 45 NoZeroCheck, // divide or modulus cannot cause exception |
50 | 46 |
51 NoReadBarrier, // does not require read barrier | 47 NoReadBarrier, // does not require read barrier |
52 NoWriteBarrier, // does not require write barrier | 48 NoWriteBarrier, // does not require write barrier |
53 NoDivSpecialCase, // divide or modulus cannot be special case of MIN_INT / -1 | |
54 DirectCompare, | |
55 IsLoaded, // field or method is resolved and class is loaded and initialized | 49 IsLoaded, // field or method is resolved and class is loaded and initialized |
56 IsStatic, // field or method access is static | |
57 IsSafepoint, // branch is backward (safepoint) | |
58 IsStrictFP, | |
59 PreservesState, // intrinsic preserves state | |
60 UnorderedIsTrue, | |
61 NeedsPatching, | 50 NeedsPatching, |
62 LiveValue, // live because value is used | 51 LiveValue, // live because value is used |
63 LiveDeopt, // live for deoptimization | 52 LiveDeopt, // live for deoptimization |
64 LiveControl, // live for control dependencies | 53 LiveControl, // live for control dependencies |
65 LiveSideEffect, // live for possible side-effects only | 54 LiveSideEffect, // live for possible side-effects only |
90 * A mask of {@linkplain Flag flags} denoting extra properties of this value. | 79 * A mask of {@linkplain Flag flags} denoting extra properties of this value. |
91 */ | 80 */ |
92 private int flags; | 81 private int flags; |
93 | 82 |
94 protected CiValue operand = CiValue.IllegalValue; | 83 protected CiValue operand = CiValue.IllegalValue; |
95 | |
96 /** | |
97 * A cache for analysis information. Every optimization must reset this field to {@code null} once it has completed. | |
98 */ | |
99 public Object optInfo; | |
100 | 84 |
101 /** | 85 /** |
102 * Used by {@link InstructionSubstituter}. | 86 * Used by {@link InstructionSubstituter}. |
103 */ | 87 */ |
104 public Value subst; | 88 public Value subst; |