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comparison graal/GraalCompiler/src/com/sun/c1x/ir/Throw.java @ 2622:91d3952f7eb7

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Framestate work : using stateAFter and reducting the number of nodes with framestates. Intermediate state (does not pass tests)
author Gilles Duboscq <gilles.duboscq@oracle.com>
date Tue, 10 May 2011 12:37:46 +0200
parents 3558ca7088c0
children 8e96b2b3a866
comparison
equal deleted inserted replaced
2621:dd115f80acf8 2622:91d3952f7eb7
22 */ 22 */
23 package com.sun.c1x.ir; 23 package com.sun.c1x.ir;
24 24
25 import com.oracle.graal.graph.*; 25 import com.oracle.graal.graph.*;
26 import com.sun.c1x.debug.*; 26 import com.sun.c1x.debug.*;
27 import com.sun.c1x.value.*;
28 import com.sun.cri.ci.*; 27 import com.sun.cri.ci.*;
29 28
30 /** 29 /**
31 * The {@code Throw} instruction represents a throw of an exception. 30 * The {@code Throw} instruction represents a throw of an exception.
32 */ 31 */
33 public final class Throw extends BlockEnd { 32 public final class Throw extends BlockEnd {
34 33
35 private static final int INPUT_COUNT = 2; 34 private static final int INPUT_COUNT = 1;
36 private static final int INPUT_EXCEPTION = 0; 35 private static final int INPUT_EXCEPTION = 0;
37 private static final int INPUT_STATE_BEFORE = 1;
38 36
39 private static final int SUCCESSOR_COUNT = 0; 37 private static final int SUCCESSOR_COUNT = 0;
40 38
41 @Override 39 @Override
42 protected int inputCount() { 40 protected int inputCount() {
58 public Value setException(Value n) { 56 public Value setException(Value n) {
59 return (Value) inputs().set(super.inputCount() + INPUT_EXCEPTION, n); 57 return (Value) inputs().set(super.inputCount() + INPUT_EXCEPTION, n);
60 } 58 }
61 59
62 /** 60 /**
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 }
73
74 /**
75 * Creates a new Throw instruction. 61 * Creates a new Throw instruction.
76 * @param exception the instruction that generates the exception to throw 62 * @param exception the instruction that generates the exception to throw
77 * @param stateAfter the state before the exception is thrown but after the exception object has been popped 63 * @param stateAfter the state before the exception is thrown but after the exception object has been popped
78 * @param isSafepoint {@code true} if this instruction is a safepoint instruction 64 * @param isSafepoint {@code true} if this instruction is a safepoint instruction
79 * @param graph 65 * @param graph
80 */ 66 */
81 public Throw(Value exception, FrameState stateAfter, boolean isSafepoint, Graph graph) { 67 public Throw(Value exception, boolean isSafepoint, Graph graph) {
82 super(CiKind.Illegal, null, isSafepoint, 0, INPUT_COUNT, SUCCESSOR_COUNT, graph); 68 super(CiKind.Illegal, null, isSafepoint, 0, INPUT_COUNT, SUCCESSOR_COUNT, graph);
83 setStateBefore(stateAfter);
84 setException(exception); 69 setException(exception);
85 } 70 }
86 71
87 /** 72 /**
88 * Checks whether this instruction can trap. 73 * Checks whether this instruction can trap.