Added Logical OR (||) and Logical AND (&&) binary operators for gas_x86_64

[old-thug]

This pull request adds support for short-circuit logical operators to the B compiler for the gas_x86_64 target:
Implemented Binop::LogAnd (&&) and Binop::LogOr (||) in the parser and lexer.
Updated code generation to support short-circuit evaluation:
LogOr evaluates the right-hand side only if the left-hand side is false.
LogAnd evaluates the right-hand side only if the left-hand side is true.
Includes appropriate unique branch labels to avoid collisions.
Fully tested with basic expressions (0 || 0, 1 || 0, 0 || 1, 1 && 0, etc.).

[yui-915]

I think making it compile to jumps at the IR level would be better, especially so that it wouldn't require special assembly for each target.

[old-thug]

I think making it compile to jumps at the IR level would be better, especially so that it wouldn't require special assembly for each target.

i didn't know that. i guess i'll check it out then

[yui-915]

check the implementation of the ternary operator, it's also short-circuiting and it uses jumps instead of a special Op. 😄