public static void compile(IRIfStatement statement, IRBytecodeContext context) {
MethodVisitor mv = context.getMv();
IRBytecodeCompiler.compileIRExpression(statement.getExpression(), context);
Label afterIf = new Label();
mv.visitJumpInsn(Opcodes.IFEQ, afterIf);
IRBytecodeCompiler.compileIRStatement(statement.getIfStatement(), context);
if (statement.getElseStatement() != null) {
Label afterElse = new Label();
boolean bTerminal = statement.getLeastSignificantTerminalStatement() != null;
if (!bTerminal) {
mv.visitJumpInsn(Opcodes.GOTO, afterElse);
}
mv.visitLabel(afterIf);
IRBytecodeCompiler.compileIRStatement(statement.getElseStatement(), context);
if (!bTerminal) {
mv.visitLabel(afterElse);
}
} else {
mv.visitLabel(afterIf);
}
}
public static void compile(IRTernaryExpression expression, IRBytecodeContext context) {
// TODO - Gosu Perf - We could make this more efficient by inspecting the conditional expression
// for common
// patterns like equality expressions or other comparisons
MethodVisitor mv = context.getMv();
Label trueLabel = new Label();
if (isComparisonToNull(expression.getTest())) {
IRBytecodeCompiler.compileIRExpression(
getNonNullEqualityOperand(expression.getTest()), context);
mv.visitJumpInsn(
getNullOpCode(expression.getTest()),
trueLabel); // i.e. jump to trueLabel if the expression is equal to null
} else {
IRBytecodeCompiler.compileIRExpression(expression.getTest(), context);
mv.visitJumpInsn(
Opcodes.IFNE,
trueLabel); // i.e. jump to trueLabel if the expression returned true and thus left a
// non-zero value on the stack
}
IRBytecodeCompiler.compileIRExpression(expression.getFalseValue(), context);
Label falseLabel = new Label();
mv.visitJumpInsn(Opcodes.GOTO, falseLabel);
mv.visitLabel(trueLabel);
IRBytecodeCompiler.compileIRExpression(expression.getTrueValue(), context);
mv.visitLabel(falseLabel);
}
private void inlineLocalFinallyStmt(IRStatement tryOrCatchStmt, Label labelEnd) {
MethodVisitor mv = _context.getMv();
if (tryOrCatchStmt.getLeastSignificantTerminalStatement() == null) {
if (hasFinally()) {
_finallyPartitioner.inlineFinally();
NamedLabel endLabel =
new NamedLabel("EndFinally" + _finallyPartitioner.getFinallyEnds().size());
_context.visitLabel(endLabel);
_finallyPartitioner.endInlineFinally(endLabel);
}
// Also jump to end of finally
mv.visitJumpInsn(Opcodes.GOTO, labelEnd);
}
}
