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comparison graal/com.oracle.graal.lir/src/com/oracle/graal/lir/SwitchStrategy.java @ 19507:1cde96b96673

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Fixed code format issues.
author Roland Schatz <roland.schatz@oracle.com>
date Thu, 19 Feb 2015 16:15:56 +0100
parents 9619ba4daf4c
children 48c1ebd24120
comparison
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19506:8c7536965c95 19507:1cde96b96673
29 import com.oracle.graal.compiler.common.calc.*; 29 import com.oracle.graal.compiler.common.calc.*;
30 import com.oracle.graal.lir.asm.*; 30 import com.oracle.graal.lir.asm.*;
31 31
32 /** 32 /**
33 * This class encapsulates different strategies on how to generate code for switch instructions. 33 * This class encapsulates different strategies on how to generate code for switch instructions.
34 * 34 *
35 * The {@link #getBestStrategy(double[], JavaConstant[], LabelRef[])} method can be used to get 35 * The {@link #getBestStrategy(double[], JavaConstant[], LabelRef[])} method can be used to get
36 * strategy with the smallest average effort (average number of comparisons until a decision is 36 * strategy with the smallest average effort (average number of comparisons until a decision is
37 * reached). The strategy returned by this method will have its averageEffort set, while a strategy 37 * reached). The strategy returned by this method will have its averageEffort set, while a strategy
38 * constructed directly will not. 38 * constructed directly will not.
39 */ 39 */
41 41
42 private interface SwitchClosure { 42 private interface SwitchClosure {
43 /** 43 /**
44 * Generates a conditional or unconditional jump. The jump will be unconditional if 44 * Generates a conditional or unconditional jump. The jump will be unconditional if
45 * condition is null. If defaultTarget is true, then the jump will go the the default. 45 * condition is null. If defaultTarget is true, then the jump will go the the default.
46 * 46 *
47 * @param index Index of the value and the jump target (only used if defaultTarget == false) 47 * @param index Index of the value and the jump target (only used if defaultTarget == false)
48 * @param condition The condition on which to jump (can be null) 48 * @param condition The condition on which to jump (can be null)
49 * @param defaultTarget true if the jump should go to the default target, false if index 49 * @param defaultTarget true if the jump should go to the default target, false if index
50 * should be used. 50 * should be used.
51 */ 51 */
52 void conditionalJump(int index, Condition condition, boolean defaultTarget); 52 void conditionalJump(int index, Condition condition, boolean defaultTarget);
53 53
54 /** 54 /**
55 * Generates a conditional jump to the target with the specified index. The fall through 55 * Generates a conditional jump to the target with the specified index. The fall through
56 * should go to the default target. 56 * should go to the default target.
57 * 57 *
58 * @param index Index of the value and the jump target 58 * @param index Index of the value and the jump target
59 * @param condition The condition on which to jump 59 * @param condition The condition on which to jump
60 * @param canFallThrough true if this is the last instruction in the switch statement, to 60 * @param canFallThrough true if this is the last instruction in the switch statement, to
61 * allow for fall-through optimizations. 61 * allow for fall-through optimizations.
62 */ 62 */
63 void conditionalJumpOrDefault(int index, Condition condition, boolean canFallThrough); 63 void conditionalJumpOrDefault(int index, Condition condition, boolean canFallThrough);
64 64
65 /** 65 /**
66 * Create a new label and generate a conditional jump to it. 66 * Create a new label and generate a conditional jump to it.
67 * 67 *
68 * @param index Index of the value and the jump target 68 * @param index Index of the value and the jump target
69 * @param condition The condition on which to jump 69 * @param condition The condition on which to jump
70 * @return a new Label 70 * @return a new Label
71 */ 71 */
72 Label conditionalJump(int index, Condition condition); 72 Label conditionalJump(int index, Condition condition);