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refactor(compiler): emit control jumps through fixups

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爱特每羊队
2026-08-05 00:24:12 +08:00
parent ac818b0821
commit ff400c47c2
5 changed files with 19 additions and 50 deletions
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crates/oxide_compiler/src/stmt/control.rs
+5 -8
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@@ -35,10 +35,7 @@ impl Compiler {
let test_reg = self.emit_expression(&ifs.test, ctx)?;
let else_pos = ctx.resolve_label(else_label)?;
let offset = (else_pos as isize) - (ctx.bytecode.len() as isize);
let offset = ctx.checked_jump_offset(offset);
ctx.emit(opcode::encode_jmp_if_false(test_reg, offset));
ctx.emit_jmp_if_false_labeled(test_reg, else_label);
let cons_reg = self.emit_statement(&ifs.consequent, ctx)?;
let result_reg = ctx.alloc_reg();
@@ -50,12 +47,10 @@ impl Compiler {
}
if ifs.alternate.is_some() {
let end_pos = ctx.resolve_label(end_label)?;
let offset = (end_pos as isize) - (ctx.bytecode.len() as isize);
let offset = ctx.checked_jump_offset(offset);
ctx.emit(opcode::encode_jmp(offset));
ctx.emit_jmp_labeled(end_label);
}
ctx.labels.label_map.insert(else_label, ctx.bytecode.len());
if let Some(alt) = &ifs.alternate {
let alt_reg = self.emit_statement(alt, ctx)?;
if let Some(r) = alt_reg {
@@ -66,6 +61,8 @@ impl Compiler {
}
}
ctx.labels.label_map.insert(end_label, ctx.bytecode.len());
Ok(Some(result_reg))
}