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package com.oracle.truffle.llvm.nodes.memory.load;
import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.NodeChild;
import com.oracle.truffle.api.dsl.NodeField;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.interop.ForeignAccess;
import com.oracle.truffle.api.interop.Message;
import com.oracle.truffle.api.interop.TruffleObject;
import com.oracle.truffle.api.interop.UnknownIdentifierException;
import com.oracle.truffle.api.interop.UnsupportedMessageException;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.llvm.nodes.intrinsics.interop.LLVMTruffleManagedMalloc.ManagedMallocObject;
import com.oracle.truffle.llvm.runtime.LLVMAddress;
import com.oracle.truffle.llvm.runtime.LLVMBoxedPrimitive;
import com.oracle.truffle.llvm.runtime.LLVMFunctionHandle;
import com.oracle.truffle.llvm.runtime.LLVMIVarBit;
import com.oracle.truffle.llvm.runtime.LLVMTruffleObject;
import com.oracle.truffle.llvm.runtime.floating.LLVM80BitFloat;
import com.oracle.truffle.llvm.runtime.global.LLVMGlobalVariable;
import com.oracle.truffle.llvm.runtime.interop.ToLLVMNode;
import com.oracle.truffle.llvm.runtime.memory.LLVMHeap;
import com.oracle.truffle.llvm.runtime.memory.LLVMMemory;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMExpressionNode;
public abstract class LLVMDirectLoadNode {
@NodeChild(type = LLVMExpressionNode.class)
@NodeField(name = "bitWidth", type = int.class)
public abstract static class LLVMIVarBitDirectLoadNode extends LLVMExpressionNode {
public abstract int getBitWidth();
@Specialization
public LLVMIVarBit executeI64(LLVMAddress addr) {
return LLVMMemory.getIVarBit(addr, getBitWidth());
}
@Specialization
public LLVMIVarBit executeI64(LLVMGlobalVariable addr) {
return LLVMMemory.getIVarBit(addr.getNativeLocation(), getBitWidth());
}
}
@NodeChild(type = LLVMExpressionNode.class)
public abstract static class LLVM80BitFloatDirectLoadNode extends LLVMExpressionNode {
@Specialization
public LLVM80BitFloat executeDouble(LLVMAddress addr) {
return LLVMMemory.get80BitFloat(addr);
}
@Specialization
public LLVM80BitFloat executeDouble(LLVMGlobalVariable addr) {
return LLVMMemory.get80BitFloat(addr.getNativeLocation());
}
}
@NodeChild(type = LLVMExpressionNode.class)
public abstract static class LLVMFunctionDirectLoadNode extends LLVMExpressionNode {
@Specialization
public LLVMFunctionHandle executeAddress(LLVMAddress addr) {
return LLVMFunctionHandle.createHandle(LLVMHeap.getFunctionPointer(addr));
}
@Specialization
public LLVMFunctionHandle executeAddress(LLVMGlobalVariable addr) {
return LLVMFunctionHandle.createHandle(LLVMHeap.getFunctionPointer(addr.getNativeLocation()));
}
}
@NodeChild(type = LLVMExpressionNode.class)
public abstract static class LLVMAddressDirectLoadNode extends LLVMExpressionNode {
@Child protected ToLLVMNode toLLVM = ToLLVMNode.createNode(TruffleObject.class);
@Specialization
public LLVMAddress executeAddress(LLVMAddress addr) {
return LLVMMemory.getAddress(addr);
}
@Specialization
public Object executeAddress(LLVMGlobalVariable addr) {
return addr.get();
}
@Specialization
public Object executeManagedMalloc(ManagedMallocObject addr) {
return addr.get(0);
}
@Specialization
public Object executeLLVMBoxedPrimitive(LLVMBoxedPrimitive addr) {
if (addr.getValue() instanceof Long) {
return LLVMMemory.getAddress((long) addr.getValue());
} else {
CompilerDirectives.transferToInterpreter();
throw new IllegalAccessError("Cannot access memory with address: " + addr.getValue());
}
}
@Specialization(guards = "objectIsManagedMalloc(addr)")
public Object executeIndirectedManagedMalloc(LLVMTruffleObject addr) {
return toLLVM.executeWithTarget(((ManagedMallocObject) addr.getObject()).get((int) (addr.getOffset() / LLVMExpressionNode.ADDRESS_SIZE_IN_BYTES)));
}
@Specialization(guards = "!objectIsManagedMalloc(addr)")
public Object executeIndirectedForeign(LLVMTruffleObject addr, @Cached("createForeignReadNode()") Node foreignRead) {
try {
return toLLVM.executeWithTarget(ForeignAccess.sendRead(foreignRead, addr.getObject(), (int) (addr.getOffset() / LLVMExpressionNode.ADDRESS_SIZE_IN_BYTES)));
} catch (UnknownIdentifierException | UnsupportedMessageException e) {
throw new UnsupportedOperationException(e);
}
}
@Specialization(guards = {"!isManagedMalloc(addr)", "notLLVM(addr)"})
public Object executeForeign(TruffleObject addr, @Cached("createForeignReadNode()") Node foreignRead) {
try {
return toLLVM.executeWithTarget(ForeignAccess.sendRead(foreignRead, addr, 0));
} catch (UnknownIdentifierException | UnsupportedMessageException e) {
throw new UnsupportedOperationException(e);
}
}
protected boolean objectIsManagedMalloc(LLVMTruffleObject addr) {
return addr.getObject() instanceof ManagedMallocObject;
}
protected boolean isManagedMalloc(TruffleObject addr) {
return addr instanceof ManagedMallocObject;
}
protected Node createForeignReadNode() {
return Message.READ.createNode();
}
}
public static final class LLVMGlobalVariableDirectLoadNode extends LLVMExpressionNode {
protected final LLVMGlobalVariable descriptor;
public LLVMGlobalVariableDirectLoadNode(LLVMGlobalVariable descriptor) {
this.descriptor = descriptor;
}
@Override
public Object executeGeneric(VirtualFrame frame) {
return descriptor.get();
}
}
@NodeChild(type = LLVMExpressionNode.class)
public abstract static class LLVMStructDirectLoadNode extends LLVMExpressionNode {
@Specialization
public LLVMAddress executeAddress(LLVMAddress addr) {
return addr; // we do not actually load the struct into a virtual register
}
}
}