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comparison graal/com.oracle.graal.api.code/src/com/oracle/graal/api/code/StackSlot.java @ 7530:5e3d1a68664e

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applied mx eclipseformat to all Java files
author Doug Simon <doug.simon@oracle.com>
date Wed, 23 Jan 2013 16:34:57 +0100
parents 2463eb24b644
children 4e1278443941
comparison
equal deleted inserted replaced
7529:4a11124a3563 7530:5e3d1a68664e
25 import static com.oracle.graal.api.meta.Kind.*; 25 import static com.oracle.graal.api.meta.Kind.*;
26 26
27 import com.oracle.graal.api.meta.*; 27 import com.oracle.graal.api.meta.*;
28 28
29 /** 29 /**
30 * Represents a compiler spill slot or an outgoing stack-based argument in a method's frame 30 * Represents a compiler spill slot or an outgoing stack-based argument in a method's frame or an
31 * or an incoming stack-based argument in a method's {@linkplain #isInCallerFrame() caller's frame}. 31 * incoming stack-based argument in a method's {@linkplain #isInCallerFrame() caller's frame}.
32 */ 32 */
33 public final class StackSlot extends Value { 33 public final class StackSlot extends Value {
34
34 private static final long serialVersionUID = -7725071921307318433L; 35 private static final long serialVersionUID = -7725071921307318433L;
35 36
36 private final int offset; 37 private final int offset;
37 private final boolean addFrameSize; 38 private final boolean addFrameSize;
38 39
39 /** 40 /**
40 * Gets a {@link StackSlot} instance representing a stack slot at a given index 41 * Gets a {@link StackSlot} instance representing a stack slot at a given index holding a value
41 * holding a value of a given kind. 42 * of a given kind.
42 * 43 *
43 * @param kind The kind of the value stored in the stack slot. 44 * @param kind The kind of the value stored in the stack slot.
44 * @param offset The offset of the stack slot (in bytes) 45 * @param offset The offset of the stack slot (in bytes)
45 * @param addFrameSize Specifies if the offset is relative to the stack pointer, 46 * @param addFrameSize Specifies if the offset is relative to the stack pointer, or the
46 * or the beginning of the frame (stack pointer + total frame size). 47 * beginning of the frame (stack pointer + total frame size).
47 */ 48 */
48 public static StackSlot get(Kind kind, int offset, boolean addFrameSize) { 49 public static StackSlot get(Kind kind, int offset, boolean addFrameSize) {
49 assert kind.getStackKind() == kind; 50 assert kind.getStackKind() == kind;
50 assert addFrameSize || offset >= 0; 51 assert addFrameSize || offset >= 0;
51 52
69 } 70 }
70 return new StackSlot(kind, offset, addFrameSize); 71 return new StackSlot(kind, offset, addFrameSize);
71 } 72 }
72 73
73 /** 74 /**
74 * Private constructor to enforce use of {@link #get(Kind, int, boolean)} so that a cache can be used. 75 * Private constructor to enforce use of {@link #get(Kind, int, boolean)} so that a cache can be
76 * used.
75 */ 77 */
76 private StackSlot(Kind kind, int offset, boolean addFrameSize) { 78 private StackSlot(Kind kind, int offset, boolean addFrameSize) {
77 super(kind); 79 super(kind);
78 this.offset = offset; 80 this.offset = offset;
79 this.addFrameSize = addFrameSize; 81 this.addFrameSize = addFrameSize;
80 } 82 }
81 83
82 /** 84 /**
83 * Gets the offset of this stack slot, relative to the stack pointer. 85 * Gets the offset of this stack slot, relative to the stack pointer.
86 *
84 * @return The offset of this slot (in bytes). 87 * @return The offset of this slot (in bytes).
85 */ 88 */
86 public int getOffset(int totalFrameSize) { 89 public int getOffset(int totalFrameSize) {
87 assert totalFrameSize > 0 || !addFrameSize; 90 assert totalFrameSize > 0 || !addFrameSize;
88 int result = offset + (addFrameSize ? totalFrameSize : 0); 91 int result = offset + (addFrameSize ? totalFrameSize : 0);
150 return get(getKind(), offset, true); 153 return get(getKind(), offset, true);
151 } 154 }
152 return this; 155 return this;
153 } 156 }
154 157
155
156 private static final int CACHE_GRANULARITY = 8; 158 private static final int CACHE_GRANULARITY = 8;
157 private static final int SPILL_CACHE_PER_KIND_SIZE = 100; 159 private static final int SPILL_CACHE_PER_KIND_SIZE = 100;
158 private static final int PARAM_CACHE_PER_KIND_SIZE = 10; 160 private static final int PARAM_CACHE_PER_KIND_SIZE = 10;
159 161
160 private static final StackSlot[][] SPILL_CACHE = makeCache(SPILL_CACHE_PER_KIND_SIZE, -1, true); 162 private static final StackSlot[][] SPILL_CACHE = makeCache(SPILL_CACHE_PER_KIND_SIZE, -1, true);
161 private static final StackSlot[][] IN_CACHE = makeCache(PARAM_CACHE_PER_KIND_SIZE, 1, true); 163 private static final StackSlot[][] IN_CACHE = makeCache(PARAM_CACHE_PER_KIND_SIZE, 1, true);
162 private static final StackSlot[][] OUT_CACHE = makeCache(PARAM_CACHE_PER_KIND_SIZE, 1, false); 164 private static final StackSlot[][] OUT_CACHE = makeCache(PARAM_CACHE_PER_KIND_SIZE, 1, false);
163 165
164 private static StackSlot[][] makeCache(int cachePerKindSize, int sign, boolean addFrameSize) { 166 private static StackSlot[][] makeCache(int cachePerKindSize, int sign, boolean addFrameSize) {
165 StackSlot[][] cache = new StackSlot[Kind.values().length][]; 167 StackSlot[][] cache = new StackSlot[Kind.values().length][];
166 for (Kind kind : new Kind[] {Illegal, Int, Long, Float, Double, Object, Jsr}) { 168 for (Kind kind : new Kind[]{Illegal, Int, Long, Float, Double, Object, Jsr}) {
167 StackSlot[] slots = new StackSlot[cachePerKindSize]; 169 StackSlot[] slots = new StackSlot[cachePerKindSize];
168 for (int i = 0; i < cachePerKindSize; i++) { 170 for (int i = 0; i < cachePerKindSize; i++) {
169 slots[i] = new StackSlot(kind, sign * i * CACHE_GRANULARITY, addFrameSize); 171 slots[i] = new StackSlot(kind, sign * i * CACHE_GRANULARITY, addFrameSize);
170 } 172 }
171 cache[kind.ordinal()] = slots; 173 cache[kind.ordinal()] = slots;