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comparison graal/GraalCompiler/src/com/sun/c1x/ir/Throw.java @ 2616:3558ca7088c0

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FrameState and Graphviz changes: * removed popx, pushx methods from GraphBuilder * FrameState subclass of Value * added String shortName() to Node * added GraphvizPrinter option to use short names * small hack in GraphvizPrinter: omit FrameState->Local connections * added GraalGraphviz to implicit classpatch (read from GRAAL env var)
author Lukas Stadler <lukas.stadler@jku.at>
date Mon, 09 May 2011 17:00:25 +0200
parents 0c6564c254af
children 91d3952f7eb7
comparison
equal deleted inserted replaced
2615:5768534fd4e5 2616:3558ca7088c0
30 /** 30 /**
31 * The {@code Throw} instruction represents a throw of an exception. 31 * The {@code Throw} instruction represents a throw of an exception.
32 */ 32 */
33 public final class Throw extends BlockEnd { 33 public final class Throw extends BlockEnd {
34 34
35 private static final int INPUT_COUNT = 1; 35 private static final int INPUT_COUNT = 2;
36 private static final int INPUT_EXCEPTION = 0; 36 private static final int INPUT_EXCEPTION = 0;
37 private static final int INPUT_STATE_BEFORE = 1;
37 38
38 private static final int SUCCESSOR_COUNT = 0; 39 private static final int SUCCESSOR_COUNT = 0;
39 40
40 @Override 41 @Override
41 protected int inputCount() { 42 protected int inputCount() {
56 57
57 public Value setException(Value n) { 58 public Value setException(Value n) {
58 return (Value) inputs().set(super.inputCount() + INPUT_EXCEPTION, n); 59 return (Value) inputs().set(super.inputCount() + INPUT_EXCEPTION, n);
59 } 60 }
60 61
61 FrameState stateBefore; 62 /**
63 * The state before this throw would occur.
64 */
65 @Override
66 public FrameState stateBefore() {
67 return (FrameState) inputs().get(super.inputCount() + INPUT_STATE_BEFORE);
68 }
69
70 private FrameState setStateBefore(FrameState n) {
71 return (FrameState) inputs().set(super.inputCount() + INPUT_STATE_BEFORE, n);
72 }
62 73
63 /** 74 /**
64 * Creates a new Throw instruction. 75 * Creates a new Throw instruction.
65 * @param exception the instruction that generates the exception to throw 76 * @param exception the instruction that generates the exception to throw
66 * @param stateAfter the state before the exception is thrown but after the exception object has been popped 77 * @param stateAfter the state before the exception is thrown but after the exception object has been popped
67 * @param isSafepoint {@code true} if this instruction is a safepoint instruction 78 * @param isSafepoint {@code true} if this instruction is a safepoint instruction
68 * @param graph 79 * @param graph
69 */ 80 */
70 public Throw(Value exception, FrameState stateAfter, boolean isSafepoint, Graph graph) { 81 public Throw(Value exception, FrameState stateAfter, boolean isSafepoint, Graph graph) {
71 super(CiKind.Illegal, null, isSafepoint, 0, INPUT_COUNT, SUCCESSOR_COUNT, graph); 82 super(CiKind.Illegal, null, isSafepoint, 0, INPUT_COUNT, SUCCESSOR_COUNT, graph);
72 this.stateBefore = stateAfter; 83 setStateBefore(stateAfter);
73 setException(exception); 84 setException(exception);
74 }
75
76 /**
77 * Returns the state before this throw would occur.
78 * @return the state before the throw
79 */
80 @Override
81 public FrameState stateBefore() {
82 return stateBefore;
83 } 85 }
84 86
85 /** 87 /**
86 * Checks whether this instruction can trap. 88 * Checks whether this instruction can trap.
87 * @return {@code true} because this instruction definitely throws an exception! 89 * @return {@code true} because this instruction definitely throws an exception!