ITStudio_OUC/OxideJS-New
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docs: 补充注释与格式化

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彭俊皓
2026-08-06 23:10:27 +08:00
parent e36a69976e
commit 31e28a03a6
156 changed files with 2393 additions and 1687 deletions
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crates/oxide_cfg/src/partition.rs
+22 -15
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@@ -6,7 +6,7 @@ use oxide_bytecode::opcode::OpCode;
use oxide_ir::operand::Operand;
use oxide_ir::IRFunction;
/// 识别块头位置：返回 `heads`，长度 `insts.len()+1`（+1 容纳指向末尾的空尾块，Pitfall 3）。
/// 识别块头位置：返回 `heads`，长度 `insts.len()+1`（+1 容纳指向末尾的空尾块）。
pub(super) fn partition_blocks(f: &IRFunction) -> Vec<bool> {
let len = f.insts.len();
let mut heads = vec![false; len + 1];
@@ -25,10 +25,7 @@ pub(super) fn partition_blocks(f: &IRFunction) -> Vec<bool> {
// 跳转的 fallthrough 后继是块头：条件跳转否则 cond+then 融块、条件边丢失；
// 无条件 JMP 同样必须切块头——JMP 不 fallthrough，但其后继位置需成块边界，
// 否则 JMP 与后续指令融块、块尾判定错、Jump 边丢失（DCE 可达性误删目标块）。
if matches!(
inst.op,
OpCode::JMP | OpCode::JMP_IF_TRUE | OpCode::JMP_IF_FALSE | OpCode::JMP_IF_NULLISH
) {
if matches!(inst.op, OpCode::JMP | OpCode::JMP_IF_TRUE | OpCode::JMP_IF_FALSE | OpCode::JMP_IF_NULLISH) {
heads[i + 1] = true;
}
}
@@ -44,9 +41,12 @@ mod tests {
#[test]
fn linear_function_only_entry_is_head() {
let mut f = IRFunction::new();
f.insts.push(Inst::new(OpCode::NOP, Operand::None, Operand::None, Operand::None));
f.insts.push(Inst::new(OpCode::NOP, Operand::None, Operand::None, Operand::None));
f.insts.push(Inst::new(OpCode::RETURN, Operand::None, Operand::None, Operand::None));
f.insts
.push(Inst::new(OpCode::NOP, Operand::None, Operand::None, Operand::None));
f.insts
.push(Inst::new(OpCode::NOP, Operand::None, Operand::None, Operand::None));
f.insts
.push(Inst::new(OpCode::RETURN, Operand::None, Operand::None, Operand::None));
let heads = partition_blocks(&f);
assert_eq!(heads, vec![true, false, false, false], "仅 inst 0 是块头");
@@ -56,9 +56,12 @@ mod tests {
#[test]
fn label_target_is_head() {
let mut f = IRFunction::new();
f.insts.push(Inst::new(OpCode::NOP, Operand::None, Operand::None, Operand::None)); // 0
f.insts.push(Inst::new(OpCode::NOP, Operand::None, Operand::None, Operand::None)); // 1: label 0 目标
f.insts.push(Inst::new(OpCode::RETURN, Operand::None, Operand::None, Operand::None)); // 2
f.insts
.push(Inst::new(OpCode::NOP, Operand::None, Operand::None, Operand::None)); // 0
f.insts
.push(Inst::new(OpCode::NOP, Operand::None, Operand::None, Operand::None)); // 1: label 0 目标
f.insts
.push(Inst::new(OpCode::RETURN, Operand::None, Operand::None, Operand::None)); // 2
f.label_pos = vec![Some(1)];
f.label_count = 1;
@@ -72,8 +75,10 @@ mod tests {
fn conditional_jump_fallthrough_successor_is_head() {
let mut f = IRFunction::new();
f.insts.push(Inst::jmp_if_false(1, 0)); // 0: cond → L0(else)
f.insts.push(Inst::new(OpCode::NOP, Operand::None, Operand::None, Operand::None)); // 1: then
f.insts.push(Inst::new(OpCode::RETURN, Operand::None, Operand::None, Operand::None)); // 2
f.insts
.push(Inst::new(OpCode::NOP, Operand::None, Operand::None, Operand::None)); // 1: then
f.insts
.push(Inst::new(OpCode::RETURN, Operand::None, Operand::None, Operand::None)); // 2
f.label_pos = vec![Some(2)];
f.label_count = 1;
@@ -86,8 +91,10 @@ mod tests {
fn unconditional_jmp_successor_is_head() {
let mut f = IRFunction::new();
f.insts.push(Inst::jmp(0)); // 0: → L0
f.insts.push(Inst::new(OpCode::NOP, Operand::None, Operand::None, Operand::None)); // 1: 独立块头
f.insts.push(Inst::new(OpCode::RETURN, Operand::None, Operand::None, Operand::None)); // 2
f.insts
.push(Inst::new(OpCode::NOP, Operand::None, Operand::None, Operand::None)); // 1: 独立块头
f.insts
.push(Inst::new(OpCode::RETURN, Operand::None, Operand::None, Operand::None)); // 2
f.label_pos = vec![Some(2)];
f.label_count = 1;