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perf: 常量字符串键计算成员折叠走 IC 静态路径

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彭俊皓
2026-08-14 10:20:32 +08:00
parent 33db6dad9c
commit 6a39bccc94
7 changed files with 390 additions and 80 deletions
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crates/oxide_emit/src/expr/call.rs
+25 -9
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@@ -89,15 +89,31 @@ impl Emitter {
}
Expression::ComputedMemberExpression(member) => {
let obj_reg = self.emit_expression(&member.object, ctx)?;
let key_reg = self.emit_expression(&member.expression, ctx)?;
let callee_reg = ctx.alloc_reg();
ctx.inst(Inst::new(
OpCode::GET_PROP_DYNAMIC,
Operand::Reg(obj_reg),
Operand::Reg(key_reg),
Operand::Reg(callee_reg),
));
(callee_reg, obj_reg)
// 常量字符串键折叠为 IC 静态路径：callee 寄存器独立于对象，this 保留对象。
if let Some(key) = crate::expr::member::computed_const_key(&member.expression) {
let idx = ctx.add_constant(Constant::String(key));
let key_reg = ctx.alloc_reg();
ctx.inst(Inst::load_const(Operand::Reg(key_reg), idx));
let callee_reg = ctx.alloc_reg();
ctx.inst(Inst::new(
OpCode::LOAD_VAR,
Operand::Reg(callee_reg),
Operand::Reg(obj_reg),
Operand::None,
));
ctx.inst(Inst::ic_get(Operand::Reg(callee_reg), Operand::Reg(key_reg)));
(callee_reg, obj_reg)
} else {
let key_reg = self.emit_expression(&member.expression, ctx)?;
let callee_reg = ctx.alloc_reg();
ctx.inst(Inst::new(
OpCode::GET_PROP_DYNAMIC,
Operand::Reg(obj_reg),
Operand::Reg(key_reg),
Operand::Reg(callee_reg),
));
(callee_reg, obj_reg)
}
}
_ => {
let callee_reg = self.emit_expression(&call.callee, ctx)?;