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Do not pollute stack when if-expression condition evaluated to False

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This commit is contained in:
Maxim Kurnikov 2019-07-03 16:13:16 +03:00
parent 6f063a402d
commit 313ffe6d6a
1 changed files with 5 additions and 1 deletions
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6
src/compile.rs
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@ -1426,11 +1426,15 @@ impl Compiler {
ast::Expression::IfExpression { test, body, orelse } => {
let no_label = self.new_label();
let end_label = self.new_label();
self.compile_test(test, None, Some(no_label), EvalContext::Expression)?;
self.compile_test(test, None, None, EvalContext::Expression)?;
self.emit(Instruction::JumpIfFalse { target: no_label });
// True case
self.compile_expression(body)?;
self.emit(Instruction::Jump { target: end_label });
// False case
self.set_label(no_label);
self.compile_expression(orelse)?;
// End
self.set_label(end_label);
}
}