com.oracle.svm.truffle

Class HostedTruffleConstantFieldProvider

java.lang.Object

com.oracle.svm.truffle.HostedTruffleConstantFieldProvider

All Implemented Interfaces:

org.graalvm.compiler.core.common.spi.ConstantFieldProvider

public final class HostedTruffleConstantFieldProvider
extends Object
implements org.graalvm.compiler.core.common.spi.ConstantFieldProvider

Nested Class Summary

Nested classes/interfaces inherited from interface org.graalvm.compiler.core.common.spi.ConstantFieldProvider

org.graalvm.compiler.core.common.spi.ConstantFieldProvider.ConstantFieldTool<T>

Constructor Summary

Constructors

Constructor and Description
HostedTruffleConstantFieldProvider(org.graalvm.compiler.core.common.spi.ConstantFieldProvider wrappedConstantFieldProvider)

Method Summary

Modifier and Type	Method and Description
<T> T	readConstantField(jdk.vm.ci.meta.ResolvedJavaField field, org.graalvm.compiler.core.common.spi.ConstantFieldProvider.ConstantFieldTool<T> tool) The CompilerDirectives.CompilationFinal annotation allows to mark arrays as stable so that array elements can be constant folded.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HostedTruffleConstantFieldProvider

public HostedTruffleConstantFieldProvider(org.graalvm.compiler.core.common.spi.ConstantFieldProvider wrappedConstantFieldProvider)

Method Detail

readConstantField

public <T> T readConstantField(jdk.vm.ci.meta.ResolvedJavaField field,
                               org.graalvm.compiler.core.common.spi.ConstantFieldProvider.ConstantFieldTool<T> tool)

The CompilerDirectives.CompilationFinal annotation allows to mark arrays as stable so that array elements can be constant folded. However, this constant folding must not happen during native image generation: that would be too early since the array can still be modified before compilation. So we disable the constant folding of such fields when preparing graphs, so that during partial evaluation the TruffleConstantFieldProvider can do the correct constant folding that takes stable array dimensions into account.

Specified by:

readConstantField in interface org.graalvm.compiler.core.common.spi.ConstantFieldProvider