8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package org.graalvm.compiler.nodes;
24
25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0;
26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0;
27
28 import org.graalvm.compiler.core.common.type.Stamp;
29 import org.graalvm.compiler.graph.IterableNodeType;
30 import org.graalvm.compiler.graph.Node;
31 import org.graalvm.compiler.graph.NodeClass;
32 import org.graalvm.compiler.graph.spi.Canonicalizable;
33 import org.graalvm.compiler.graph.spi.CanonicalizerTool;
34 import org.graalvm.compiler.nodeinfo.NodeInfo;
35 import org.graalvm.compiler.nodes.extended.GuardingNode;
36 import org.graalvm.compiler.nodes.spi.LIRLowerable;
37 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
38 import org.graalvm.compiler.nodes.spi.ValueProxy;
39 import org.graalvm.compiler.nodes.spi.Virtualizable;
40 import org.graalvm.compiler.nodes.spi.VirtualizerTool;
41 import org.graalvm.compiler.nodes.virtual.VirtualObjectNode;
42
43 import jdk.vm.ci.meta.JavaKind;
44
45 /**
46 * A node that changes the type of its input, usually narrowing it. For example, a GuardedValueNode
47 * is used to keep the nodes depending on guards inside a loop during speculative guard movement.
48 *
49 * A GuardedValueNode will only go away if its guard is null or {@link StructuredGraph#start()}.
50 */
51 @NodeInfo(cycles = CYCLES_0, size = SIZE_0)
52 public final class GuardedValueNode extends FloatingGuardedNode implements LIRLowerable, Virtualizable, IterableNodeType, Canonicalizable, ValueProxy {
53
54 public static final NodeClass<GuardedValueNode> TYPE = NodeClass.create(GuardedValueNode.class);
55 @Input ValueNode object;
56 protected final Stamp piStamp;
57
58 public GuardedValueNode(ValueNode object, GuardingNode guard, Stamp stamp) {
59 super(TYPE, computeStamp(stamp, object), guard);
60 this.object = object;
61 this.piStamp = stamp;
62 }
63
64 public GuardedValueNode(ValueNode object, GuardingNode guard) {
65 this(object, guard, object.stamp());
66 }
67
68 public ValueNode object() {
69 return object;
70 }
71
72 @Override
73 public void generate(NodeLIRBuilderTool generator) {
74 if (object.getStackKind() != JavaKind.Void && object.getStackKind() != JavaKind.Illegal) {
75 generator.setResult(this, generator.operand(object));
76 }
77 }
78
79 @Override
80 public boolean inferStamp() {
81 return updateStamp(computeStamp(piStamp, object()));
82 }
83
84 static Stamp computeStamp(Stamp piStamp, ValueNode object) {
85 return piStamp.improveWith(object.stamp());
86 }
87
88 @Override
89 public void virtualize(VirtualizerTool tool) {
90 ValueNode alias = tool.getAlias(object());
91 if (alias instanceof VirtualObjectNode) {
92 tool.replaceWithVirtual((VirtualObjectNode) alias);
93 }
94 }
95
96 @Override
97 public Node canonical(CanonicalizerTool tool) {
98 if (getGuard() == null) {
99 if (stamp().equals(object().stamp())) {
100 return object();
101 } else {
102 return new PiNode(object(), stamp());
103 }
104 }
105 return this;
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8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package org.graalvm.compiler.nodes;
24
25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0;
26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0;
27
28 import org.graalvm.compiler.graph.Node;
29 import org.graalvm.compiler.graph.NodeClass;
30 import org.graalvm.compiler.graph.spi.Canonicalizable;
31 import org.graalvm.compiler.graph.spi.CanonicalizerTool;
32 import org.graalvm.compiler.nodeinfo.NodeInfo;
33 import org.graalvm.compiler.nodes.extended.GuardingNode;
34 import org.graalvm.compiler.nodes.spi.LIRLowerable;
35 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
36 import org.graalvm.compiler.nodes.spi.ValueProxy;
37 import org.graalvm.compiler.nodes.spi.Virtualizable;
38 import org.graalvm.compiler.nodes.spi.VirtualizerTool;
39 import org.graalvm.compiler.nodes.virtual.VirtualObjectNode;
40
41 import jdk.vm.ci.meta.JavaKind;
42
43 /**
44 * A node that changes the type of its input, usually narrowing it. For example, a GuardedValueNode
45 * is used to keep the nodes depending on guards inside a loop during speculative guard movement.
46 *
47 * A GuardedValueNode will only go away if its guard is null or {@link StructuredGraph#start()}.
48 */
49 @NodeInfo(cycles = CYCLES_0, size = SIZE_0)
50 public final class GuardedValueNode extends FloatingGuardedNode implements LIRLowerable, Virtualizable, Canonicalizable, ValueProxy {
51
52 public static final NodeClass<GuardedValueNode> TYPE = NodeClass.create(GuardedValueNode.class);
53 @Input ValueNode object;
54
55 public GuardedValueNode(ValueNode object, GuardingNode guard) {
56 super(TYPE, object.stamp(), guard);
57 this.object = object;
58 }
59
60 public ValueNode object() {
61 return object;
62 }
63
64 @Override
65 public void generate(NodeLIRBuilderTool generator) {
66 if (object.getStackKind() != JavaKind.Void && object.getStackKind() != JavaKind.Illegal) {
67 generator.setResult(this, generator.operand(object));
68 }
69 }
70
71 @Override
72 public boolean inferStamp() {
73 return updateStamp(object().stamp());
74 }
75
76 @Override
77 public void virtualize(VirtualizerTool tool) {
78 ValueNode alias = tool.getAlias(object());
79 if (alias instanceof VirtualObjectNode) {
80 tool.replaceWithVirtual((VirtualObjectNode) alias);
81 }
82 }
83
84 @Override
85 public Node canonical(CanonicalizerTool tool) {
86 if (getGuard() == null) {
87 if (stamp().equals(object().stamp())) {
88 return object();
89 } else {
90 return new PiNode(object(), stamp());
91 }
92 }
93 return this;
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