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IR codegen: scroll, debug.log, debug.assert

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Adds Scroll / DebugLog / DebugAssert variants to IrOp, wires them into
the IR lowering, optimizer liveness tracking, and IR codegen. Scroll
emits two PPU $2005 writes; debug statements emit writes to $4800 when
IrCodeGen::with_debug(true) is set, stripped otherwise. These were the
last feature gaps versus the AST codegen path, so IR codegen is now a
full replacement.

https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
This commit is contained in:
Claude 2026-04-12 10:43:53 +00:00
parent 8a6441071e
commit d609b77cd7
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5 changed files with 162 additions and 6 deletions
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17
src/ir/lowering.rs
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@ -310,16 +310,21 @@ impl LoweringContext {
let arg_temps: Vec<_> = args.iter().map(|a| self.lower_expr(a)).collect();
self.emit(IrOp::Call(None, name.clone(), arg_temps));
}
Statement::Scroll(_, _, _) => {
// TODO: implement scroll hardware writes
Statement::Scroll(x_expr, y_expr, _) => {
let x = self.lower_expr(x_expr);
let y = self.lower_expr(y_expr);
self.emit(IrOp::Scroll(x, y));
}
Statement::LoadBackground(_, _) | Statement::SetPalette(_, _) => {
// TODO: implement in asset pipeline
}
Statement::DebugLog(_, _) | Statement::DebugAssert(_, _) => {
// Debug statements don't produce IR ops in release mode.
// In debug mode, the AST-based codegen handles them directly
// (IR codegen path for debug is a future enhancement).
Statement::DebugLog(args, _) => {
let temps: Vec<_> = args.iter().map(|a| self.lower_expr(a)).collect();
self.emit(IrOp::DebugLog(temps));
}
Statement::DebugAssert(cond, _) => {
let t = self.lower_expr(cond);
self.emit(IrOp::DebugAssert(t));
}
}
}