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package com.oracle.truffle.llvm.nodes.memory.load;
import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.dsl.NodeChild;
import com.oracle.truffle.api.dsl.Specialization;
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.runtime.LLVMAddress;
import com.oracle.truffle.llvm.runtime.LLVMBoxedPrimitive;
import com.oracle.truffle.llvm.runtime.LLVMTruffleObject;
import com.oracle.truffle.llvm.runtime.global.LLVMGlobalVariable;
import com.oracle.truffle.llvm.runtime.interop.ToLLVMNode;
import com.oracle.truffle.llvm.runtime.memory.LLVMMemory;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMExpressionNode;
import com.oracle.truffle.llvm.runtime.types.PrimitiveType;
// Truffle has no branch profiles for boolean
@NodeChild(type = LLVMExpressionNode.class)
public abstract class LLVMI1LoadNode extends LLVMExpressionNode {
@Child protected Node foreignRead = Message.READ.createNode();
@Child protected ToLLVMNode toLLVM = ToLLVMNode.createNode(boolean.class);
protected boolean doForeignAccess(LLVMTruffleObject addr) {
try {
int index = (int) (addr.getOffset());
Object value = ForeignAccess.sendRead(foreignRead, addr.getObject(), index);
return (boolean) toLLVM.executeWithTarget(value);
} catch (UnknownIdentifierException | UnsupportedMessageException e) {
throw new IllegalStateException(e);
}
}
@Specialization
public boolean executeBoolean(LLVMGlobalVariable addr) {
return addr.getI1();
}
@Specialization
public boolean executeShort(LLVMAddress addr) {
return LLVMMemory.getI1(addr);
}
@Specialization
public boolean executeShort(LLVMTruffleObject addr) {
return doForeignAccess(addr);
}
@Specialization
public boolean executeLLVMBoxedPrimitive(LLVMBoxedPrimitive addr) {
if (addr.getValue() instanceof Long) {
return LLVMMemory.getI1((long) addr.getValue());
} else {
CompilerDirectives.transferToInterpreter();
throw new IllegalAccessError("Cannot access address: " + addr.getValue());
}
}
@Specialization(guards = "notLLVM(addr)")
public boolean executeShort(TruffleObject addr) {
return executeShort(new LLVMTruffleObject(addr, PrimitiveType.I1));
}
}