fix: 修复 switch case 标签冲突与大 switch 寄存器回绕

2026-06-08 23:45:00 +08:00
parent afcc76a222
commit bf75fcd0c9
5 changed files with 50 additions and 3 deletions
@@ -143,6 +143,7 @@ impl Compiler {
                ctx.push_switch(end_label);

                self.count_expression(&sw.discriminant, ctx);
+                let compare_reg_checkpoint = ctx.reg_checkpoint();

                let cases = &sw.cases;
                for case in cases.iter() {
@@ -151,6 +152,7 @@ impl Compiler {
                        ctx.projected_pc += 1; // EQ
                        ctx.alloc_reg(); // eq result
                        ctx.projected_pc += 1; // JMP_IF_TRUE
+                        ctx.restore_reg_checkpoint(compare_reg_checkpoint);
                    }
                }

@@ -160,7 +162,7 @@ impl Compiler {
                }

                for (case_idx, case) in cases.iter().enumerate() {
-                    let case_label = Label::SwitchCase(id * 256 + case_idx as u32);
+                    let case_label = Label::SwitchCase(id, case_idx as u32);
                    ctx.label_map.insert(case_label, ctx.projected_pc);
                    for s in &case.consequent {
                        self.count_statement(s, ctx);