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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/shared/chain.rs
+22
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@@ -2,6 +2,7 @@
//! 函数：`emit_chainable_expression`、`emit_optional_guard`、`emit_chain_call` 等。
use crate::expr::call::pack_arg_regs;
use crate::expr::member::is_array_index_str;
use crate::{CompileCtx, Emitter};
use oxide_bytecode::module::Constant;
use oxide_bytecode::opcode::OpCode;
@@ -44,6 +45,16 @@ impl Emitter {
self.emit_optional_guard(obj_reg, label, ctx)?;
}
}
// 常量字符串键折叠为 IC 静态路径：value 独立寄存器，base 保留供 this 绑定。
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 value_reg = ctx.alloc_reg();
ctx.inst(Inst::new(OpCode::LOAD_VAR, Operand::Reg(value_reg), Operand::Reg(obj_reg), Operand::None));
ctx.inst(Inst::ic_get(Operand::Reg(value_reg), Operand::Reg(key_reg)));
return Ok((value_reg, obj_reg));
}
let key_reg = self.emit_expression(&member.expression, ctx)?;
let value_reg = ctx.alloc_reg();
ctx.inst(Inst::new(
@@ -289,6 +300,17 @@ impl Emitter {
}
let prop_reg = ctx.alloc_reg();
ctx.inst(Inst::new(OpCode::LOAD_VAR, Operand::Reg(prop_reg), Operand::Reg(src_reg), Operand::None));
// 字符串字面量计算键折叠为 IC 静态路径；标识符/数字键走 DYNAMIC。
if let PropertyKey::StringLiteral(s) = key {
let key_str = s.value.to_string();
if !is_array_index_str(&key_str) {
let key_idx = ctx.add_constant(Constant::String(key_str));
let key_reg = ctx.alloc_reg();
ctx.inst(Inst::load_const(Operand::Reg(key_reg), key_idx));
ctx.inst(Inst::ic_get(Operand::Reg(prop_reg), Operand::Reg(key_reg)));
return Ok((prop_reg, None, Some(key_reg)));
}
}
let key_reg = self.emit_property_key_expression(key, ctx)?;
let val_reg = ctx.alloc_reg();
ctx.inst(Inst::new(