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package org.graalvm.wasm.nodes;
import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
import com.oracle.truffle.api.HostCompilerDirectives.BytecodeInterpreterSwitchBoundary;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.profiles.ConditionProfile;
import org.graalvm.wasm.WasmCodeEntry;
import org.graalvm.wasm.WasmContext;
import org.graalvm.wasm.WasmInstance;
public final class WasmIfNode extends WasmNode {
@CompilationFinal private final byte returnTypeId;
@CompilationFinal private final int initialStackPointer;
@Child private WasmBlockNode trueBranch;
@Child private WasmBlockNode falseBranch;
private final ConditionProfile condition = ConditionProfile.createCountingProfile();
public WasmIfNode(WasmInstance wasmInstance, WasmCodeEntry codeEntry, WasmBlockNode trueBranch, WasmBlockNode falseBranch, int byteLength, byte returnTypeId, int initialStackPointer) {
super(wasmInstance, codeEntry, byteLength);
this.returnTypeId = returnTypeId;
this.initialStackPointer = initialStackPointer;
this.trueBranch = trueBranch;
this.falseBranch = falseBranch;
}
@BytecodeInterpreterSwitchBoundary
@Override
public int execute(WasmContext context, VirtualFrame frame, long[] stacklocals) {
int stackPointer = initialStackPointer - 1;
if (condition.profile(popInt(stacklocals, codeEntry().numLocals() + stackPointer) != 0)) {
return trueBranch.execute(context, frame, stacklocals);
} else if (falseBranch != null) {
return falseBranch.execute(context, frame, stacklocals);
} else {
return -1;
}
}
@Override
public byte returnTypeId() {
return returnTypeId;
}
@Override
int intConstantLength() {
return trueBranch.intConstantLength() + (falseBranch != null ? falseBranch.intConstantLength() : 0);
}
@Override
int branchTableLength() {
return trueBranch.branchTableLength() + (falseBranch != null ? falseBranch.branchTableLength() : 0);
}
@Override
int profileCount() {
return trueBranch.profileCount() + (falseBranch != null ? falseBranch.profileCount() : 0);
}
}