1210 lines
43 KiB
C++
1210 lines
43 KiB
C++
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
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#include "IrTranslation.h"
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#include "Luau/Bytecode.h"
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#include "Luau/IrBuilder.h"
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#include "Luau/IrUtils.h"
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#include "IrTranslateBuiltins.h"
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#include "lobject.h"
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#include "lstate.h"
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#include "ltm.h"
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namespace Luau
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{
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namespace CodeGen
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{
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// Helper to consistently define a switch to instruction fallback code
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struct FallbackStreamScope
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{
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FallbackStreamScope(IrBuilder& build, IrOp fallback, IrOp next)
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: build(build)
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, next(next)
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{
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LUAU_ASSERT(fallback.kind == IrOpKind::Block);
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LUAU_ASSERT(next.kind == IrOpKind::Block);
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build.inst(IrCmd::JUMP, next);
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build.beginBlock(fallback);
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}
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~FallbackStreamScope()
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{
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build.beginBlock(next);
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}
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IrBuilder& build;
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IrOp next;
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};
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void translateInstLoadNil(IrBuilder& build, const Instruction* pc)
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{
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int ra = LUAU_INSN_A(*pc);
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build.inst(IrCmd::STORE_TAG, build.vmReg(ra), build.constTag(LUA_TNIL));
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}
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void translateInstLoadB(IrBuilder& build, const Instruction* pc, int pcpos)
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{
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int ra = LUAU_INSN_A(*pc);
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build.inst(IrCmd::STORE_INT, build.vmReg(ra), build.constInt(LUAU_INSN_B(*pc)));
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build.inst(IrCmd::STORE_TAG, build.vmReg(ra), build.constTag(LUA_TBOOLEAN));
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if (int target = LUAU_INSN_C(*pc))
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build.inst(IrCmd::JUMP, build.blockAtInst(pcpos + 1 + target));
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}
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void translateInstLoadN(IrBuilder& build, const Instruction* pc)
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{
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int ra = LUAU_INSN_A(*pc);
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build.inst(IrCmd::STORE_DOUBLE, build.vmReg(ra), build.constDouble(double(LUAU_INSN_D(*pc))));
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build.inst(IrCmd::STORE_TAG, build.vmReg(ra), build.constTag(LUA_TNUMBER));
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}
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static void translateInstLoadConstant(IrBuilder& build, int ra, int k)
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{
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TValue protok = build.function.proto->k[k];
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// Compiler only generates LOADK for source-level constants, so dynamic imports are not affected
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if (protok.tt == LUA_TNIL)
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{
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build.inst(IrCmd::STORE_TAG, build.vmReg(ra), build.constTag(LUA_TNIL));
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}
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else if (protok.tt == LUA_TBOOLEAN)
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{
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build.inst(IrCmd::STORE_INT, build.vmReg(ra), build.constInt(protok.value.b));
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build.inst(IrCmd::STORE_TAG, build.vmReg(ra), build.constTag(LUA_TBOOLEAN));
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}
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else if (protok.tt == LUA_TNUMBER)
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{
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build.inst(IrCmd::STORE_DOUBLE, build.vmReg(ra), build.constDouble(protok.value.n));
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build.inst(IrCmd::STORE_TAG, build.vmReg(ra), build.constTag(LUA_TNUMBER));
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}
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else
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{
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// Remaining tag here right now is LUA_TSTRING, while it can be transformed to LOAD_POINTER/STORE_POINTER/STORE_TAG, it's not profitable right
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// now
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IrOp load = build.inst(IrCmd::LOAD_TVALUE, build.vmConst(k));
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build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra), load);
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}
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}
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void translateInstLoadK(IrBuilder& build, const Instruction* pc)
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{
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translateInstLoadConstant(build, LUAU_INSN_A(*pc), LUAU_INSN_D(*pc));
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}
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void translateInstLoadKX(IrBuilder& build, const Instruction* pc)
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{
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translateInstLoadConstant(build, LUAU_INSN_A(*pc), pc[1]);
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}
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void translateInstMove(IrBuilder& build, const Instruction* pc)
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{
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int ra = LUAU_INSN_A(*pc);
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int rb = LUAU_INSN_B(*pc);
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IrOp load = build.inst(IrCmd::LOAD_TVALUE, build.vmReg(rb));
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build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra), load);
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}
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void translateInstJump(IrBuilder& build, const Instruction* pc, int pcpos)
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{
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build.inst(IrCmd::JUMP, build.blockAtInst(pcpos + 1 + LUAU_INSN_D(*pc)));
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}
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void translateInstJumpBack(IrBuilder& build, const Instruction* pc, int pcpos)
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{
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build.inst(IrCmd::INTERRUPT, build.constUint(pcpos));
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build.inst(IrCmd::JUMP, build.blockAtInst(pcpos + 1 + LUAU_INSN_D(*pc)));
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}
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void translateInstJumpIf(IrBuilder& build, const Instruction* pc, int pcpos, bool not_)
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{
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int ra = LUAU_INSN_A(*pc);
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IrOp target = build.blockAtInst(pcpos + 1 + LUAU_INSN_D(*pc));
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IrOp next = build.blockAtInst(pcpos + 1);
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// TODO: falsy/truthy conditions should be deconstructed into more primitive operations
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if (not_)
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build.inst(IrCmd::JUMP_IF_FALSY, build.vmReg(ra), target, next);
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else
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build.inst(IrCmd::JUMP_IF_TRUTHY, build.vmReg(ra), target, next);
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// Fallthrough in original bytecode is implicit, so we start next internal block here
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if (build.isInternalBlock(next))
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build.beginBlock(next);
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}
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void translateInstJumpIfEq(IrBuilder& build, const Instruction* pc, int pcpos, bool not_)
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{
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int ra = LUAU_INSN_A(*pc);
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int rb = pc[1];
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IrOp target = build.blockAtInst(pcpos + 1 + LUAU_INSN_D(*pc));
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IrOp next = build.blockAtInst(pcpos + 2);
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IrOp numberCheck = build.block(IrBlockKind::Internal);
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IrOp fallback = build.block(IrBlockKind::Fallback);
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IrOp ta = build.inst(IrCmd::LOAD_TAG, build.vmReg(ra));
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IrOp tb = build.inst(IrCmd::LOAD_TAG, build.vmReg(rb));
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build.inst(IrCmd::JUMP_EQ_TAG, ta, tb, numberCheck, not_ ? target : next);
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build.beginBlock(numberCheck);
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// fast-path: number
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build.inst(IrCmd::CHECK_TAG, ta, build.constTag(LUA_TNUMBER), fallback);
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IrOp va = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(ra));
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IrOp vb = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(rb));
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build.inst(IrCmd::JUMP_CMP_NUM, va, vb, build.cond(IrCondition::NotEqual), not_ ? target : next, not_ ? next : target);
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build.beginBlock(fallback);
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build.inst(IrCmd::SET_SAVEDPC, build.constUint(pcpos + 1));
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build.inst(IrCmd::JUMP_CMP_ANY, build.vmReg(ra), build.vmReg(rb), build.cond(not_ ? IrCondition::NotEqual : IrCondition::Equal), target, next);
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build.beginBlock(next);
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}
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void translateInstJumpIfCond(IrBuilder& build, const Instruction* pc, int pcpos, IrCondition cond)
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{
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int ra = LUAU_INSN_A(*pc);
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int rb = pc[1];
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IrOp target = build.blockAtInst(pcpos + 1 + LUAU_INSN_D(*pc));
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IrOp next = build.blockAtInst(pcpos + 2);
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IrOp fallback = build.block(IrBlockKind::Fallback);
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// fast-path: number
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IrOp ta = build.inst(IrCmd::LOAD_TAG, build.vmReg(ra));
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build.inst(IrCmd::CHECK_TAG, ta, build.constTag(LUA_TNUMBER), fallback);
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IrOp tb = build.inst(IrCmd::LOAD_TAG, build.vmReg(rb));
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build.inst(IrCmd::CHECK_TAG, tb, build.constTag(LUA_TNUMBER), fallback);
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IrOp va = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(ra));
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IrOp vb = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(rb));
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build.inst(IrCmd::JUMP_CMP_NUM, va, vb, build.cond(cond), target, next);
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build.beginBlock(fallback);
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build.inst(IrCmd::SET_SAVEDPC, build.constUint(pcpos + 1));
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build.inst(IrCmd::JUMP_CMP_ANY, build.vmReg(ra), build.vmReg(rb), build.cond(cond), target, next);
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build.beginBlock(next);
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}
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void translateInstJumpX(IrBuilder& build, const Instruction* pc, int pcpos)
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{
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build.inst(IrCmd::INTERRUPT, build.constUint(pcpos));
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build.inst(IrCmd::JUMP, build.blockAtInst(pcpos + 1 + LUAU_INSN_E(*pc)));
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}
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void translateInstJumpxEqNil(IrBuilder& build, const Instruction* pc, int pcpos)
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{
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int ra = LUAU_INSN_A(*pc);
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bool not_ = (pc[1] & 0x80000000) != 0;
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IrOp target = build.blockAtInst(pcpos + 1 + LUAU_INSN_D(*pc));
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IrOp next = build.blockAtInst(pcpos + 2);
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IrOp ta = build.inst(IrCmd::LOAD_TAG, build.vmReg(ra));
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build.inst(IrCmd::JUMP_EQ_TAG, ta, build.constTag(LUA_TNIL), not_ ? next : target, not_ ? target : next);
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// Fallthrough in original bytecode is implicit, so we start next internal block here
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if (build.isInternalBlock(next))
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build.beginBlock(next);
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}
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void translateInstJumpxEqB(IrBuilder& build, const Instruction* pc, int pcpos)
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{
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int ra = LUAU_INSN_A(*pc);
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uint32_t aux = pc[1];
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bool not_ = (aux & 0x80000000) != 0;
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IrOp target = build.blockAtInst(pcpos + 1 + LUAU_INSN_D(*pc));
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IrOp next = build.blockAtInst(pcpos + 2);
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IrOp checkValue = build.block(IrBlockKind::Internal);
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IrOp ta = build.inst(IrCmd::LOAD_TAG, build.vmReg(ra));
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build.inst(IrCmd::JUMP_EQ_TAG, ta, build.constTag(LUA_TBOOLEAN), checkValue, not_ ? target : next);
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build.beginBlock(checkValue);
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IrOp va = build.inst(IrCmd::LOAD_INT, build.vmReg(ra));
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build.inst(IrCmd::JUMP_EQ_INT, va, build.constInt(aux & 0x1), not_ ? next : target, not_ ? target : next);
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// Fallthrough in original bytecode is implicit, so we start next internal block here
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if (build.isInternalBlock(next))
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build.beginBlock(next);
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}
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void translateInstJumpxEqN(IrBuilder& build, const Instruction* pc, int pcpos)
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{
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int ra = LUAU_INSN_A(*pc);
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uint32_t aux = pc[1];
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bool not_ = (aux & 0x80000000) != 0;
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IrOp target = build.blockAtInst(pcpos + 1 + LUAU_INSN_D(*pc));
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IrOp next = build.blockAtInst(pcpos + 2);
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IrOp checkValue = build.block(IrBlockKind::Internal);
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IrOp ta = build.inst(IrCmd::LOAD_TAG, build.vmReg(ra));
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build.inst(IrCmd::JUMP_EQ_TAG, ta, build.constTag(LUA_TNUMBER), checkValue, not_ ? target : next);
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build.beginBlock(checkValue);
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IrOp va = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(ra));
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LUAU_ASSERT(build.function.proto);
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TValue protok = build.function.proto->k[aux & 0xffffff];
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LUAU_ASSERT(protok.tt == LUA_TNUMBER);
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IrOp vb = build.constDouble(protok.value.n);
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build.inst(IrCmd::JUMP_CMP_NUM, va, vb, build.cond(IrCondition::NotEqual), not_ ? target : next, not_ ? next : target);
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// Fallthrough in original bytecode is implicit, so we start next internal block here
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if (build.isInternalBlock(next))
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build.beginBlock(next);
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}
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void translateInstJumpxEqS(IrBuilder& build, const Instruction* pc, int pcpos)
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{
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int ra = LUAU_INSN_A(*pc);
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uint32_t aux = pc[1];
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bool not_ = (aux & 0x80000000) != 0;
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IrOp target = build.blockAtInst(pcpos + 1 + LUAU_INSN_D(*pc));
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IrOp next = build.blockAtInst(pcpos + 2);
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IrOp checkValue = build.block(IrBlockKind::Internal);
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IrOp ta = build.inst(IrCmd::LOAD_TAG, build.vmReg(ra));
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build.inst(IrCmd::JUMP_EQ_TAG, ta, build.constTag(LUA_TSTRING), checkValue, not_ ? target : next);
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build.beginBlock(checkValue);
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IrOp va = build.inst(IrCmd::LOAD_POINTER, build.vmReg(ra));
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IrOp vb = build.inst(IrCmd::LOAD_POINTER, build.vmConst(aux & 0xffffff));
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build.inst(IrCmd::JUMP_EQ_POINTER, va, vb, not_ ? next : target, not_ ? target : next);
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// Fallthrough in original bytecode is implicit, so we start next internal block here
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if (build.isInternalBlock(next))
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build.beginBlock(next);
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}
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static void translateInstBinaryNumeric(IrBuilder& build, int ra, int rb, int rc, IrOp opc, int pcpos, TMS tm)
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{
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IrOp fallback = build.block(IrBlockKind::Fallback);
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// fast-path: number
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IrOp tb = build.inst(IrCmd::LOAD_TAG, build.vmReg(rb));
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build.inst(IrCmd::CHECK_TAG, tb, build.constTag(LUA_TNUMBER), fallback);
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if (rc != -1 && rc != rb) // TODO: optimization should handle second check, but we'll test it later
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{
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IrOp tc = build.inst(IrCmd::LOAD_TAG, build.vmReg(rc));
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build.inst(IrCmd::CHECK_TAG, tc, build.constTag(LUA_TNUMBER), fallback);
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}
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IrOp vb = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(rb));
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IrOp vc;
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IrOp result;
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if (opc.kind == IrOpKind::VmConst)
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{
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LUAU_ASSERT(build.function.proto);
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TValue protok = build.function.proto->k[vmConstOp(opc)];
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LUAU_ASSERT(protok.tt == LUA_TNUMBER);
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// VM has special cases for exponentiation with constants
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if (tm == TM_POW && protok.value.n == 0.5)
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result = build.inst(IrCmd::SQRT_NUM, vb);
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else if (tm == TM_POW && protok.value.n == 2.0)
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result = build.inst(IrCmd::MUL_NUM, vb, vb);
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else if (tm == TM_POW && protok.value.n == 3.0)
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result = build.inst(IrCmd::MUL_NUM, vb, build.inst(IrCmd::MUL_NUM, vb, vb));
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else
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vc = build.constDouble(protok.value.n);
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}
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else
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{
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vc = build.inst(IrCmd::LOAD_DOUBLE, opc);
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}
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if (result.kind == IrOpKind::None)
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{
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LUAU_ASSERT(vc.kind != IrOpKind::None);
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switch (tm)
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{
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case TM_ADD:
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result = build.inst(IrCmd::ADD_NUM, vb, vc);
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break;
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case TM_SUB:
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result = build.inst(IrCmd::SUB_NUM, vb, vc);
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break;
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case TM_MUL:
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result = build.inst(IrCmd::MUL_NUM, vb, vc);
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break;
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case TM_DIV:
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result = build.inst(IrCmd::DIV_NUM, vb, vc);
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break;
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case TM_MOD:
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result = build.inst(IrCmd::MOD_NUM, vb, vc);
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break;
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case TM_POW:
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result = build.inst(IrCmd::INVOKE_LIBM, build.constUint(LBF_MATH_POW), vb, vc);
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break;
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default:
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LUAU_ASSERT(!"Unsupported binary op");
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}
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}
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build.inst(IrCmd::STORE_DOUBLE, build.vmReg(ra), result);
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if (ra != rb && ra != rc) // TODO: optimization should handle second check, but we'll test this later
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build.inst(IrCmd::STORE_TAG, build.vmReg(ra), build.constTag(LUA_TNUMBER));
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IrOp next = build.blockAtInst(pcpos + 1);
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FallbackStreamScope scope(build, fallback, next);
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build.inst(IrCmd::SET_SAVEDPC, build.constUint(pcpos + 1));
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build.inst(IrCmd::DO_ARITH, build.vmReg(ra), build.vmReg(rb), opc, build.constInt(tm));
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build.inst(IrCmd::JUMP, next);
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}
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void translateInstBinary(IrBuilder& build, const Instruction* pc, int pcpos, TMS tm)
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{
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translateInstBinaryNumeric(build, LUAU_INSN_A(*pc), LUAU_INSN_B(*pc), LUAU_INSN_C(*pc), build.vmReg(LUAU_INSN_C(*pc)), pcpos, tm);
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}
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void translateInstBinaryK(IrBuilder& build, const Instruction* pc, int pcpos, TMS tm)
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{
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translateInstBinaryNumeric(build, LUAU_INSN_A(*pc), LUAU_INSN_B(*pc), -1, build.vmConst(LUAU_INSN_C(*pc)), pcpos, tm);
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}
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void translateInstNot(IrBuilder& build, const Instruction* pc)
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{
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int ra = LUAU_INSN_A(*pc);
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int rb = LUAU_INSN_B(*pc);
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IrOp tb = build.inst(IrCmd::LOAD_TAG, build.vmReg(rb));
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IrOp vb = build.inst(IrCmd::LOAD_INT, build.vmReg(rb));
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IrOp va = build.inst(IrCmd::NOT_ANY, tb, vb);
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build.inst(IrCmd::STORE_INT, build.vmReg(ra), va);
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build.inst(IrCmd::STORE_TAG, build.vmReg(ra), build.constTag(LUA_TBOOLEAN));
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}
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void translateInstMinus(IrBuilder& build, const Instruction* pc, int pcpos)
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{
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int ra = LUAU_INSN_A(*pc);
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int rb = LUAU_INSN_B(*pc);
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IrOp fallback = build.block(IrBlockKind::Fallback);
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IrOp tb = build.inst(IrCmd::LOAD_TAG, build.vmReg(rb));
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build.inst(IrCmd::CHECK_TAG, tb, build.constTag(LUA_TNUMBER), fallback);
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// fast-path: number
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IrOp vb = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(rb));
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IrOp va = build.inst(IrCmd::UNM_NUM, vb);
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build.inst(IrCmd::STORE_DOUBLE, build.vmReg(ra), va);
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if (ra != rb)
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build.inst(IrCmd::STORE_TAG, build.vmReg(ra), build.constTag(LUA_TNUMBER));
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IrOp next = build.blockAtInst(pcpos + 1);
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FallbackStreamScope scope(build, fallback, next);
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build.inst(IrCmd::SET_SAVEDPC, build.constUint(pcpos + 1));
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build.inst(IrCmd::DO_ARITH, build.vmReg(LUAU_INSN_A(*pc)), build.vmReg(LUAU_INSN_B(*pc)), build.vmReg(LUAU_INSN_B(*pc)), build.constInt(TM_UNM));
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build.inst(IrCmd::JUMP, next);
|
|
}
|
|
|
|
void translateInstLength(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
int rb = LUAU_INSN_B(*pc);
|
|
|
|
IrOp fallback = build.block(IrBlockKind::Fallback);
|
|
|
|
IrOp tb = build.inst(IrCmd::LOAD_TAG, build.vmReg(rb));
|
|
build.inst(IrCmd::CHECK_TAG, tb, build.constTag(LUA_TTABLE), fallback);
|
|
|
|
// fast-path: table without __len
|
|
IrOp vb = build.inst(IrCmd::LOAD_POINTER, build.vmReg(rb));
|
|
build.inst(IrCmd::CHECK_NO_METATABLE, vb, fallback);
|
|
|
|
IrOp va = build.inst(IrCmd::TABLE_LEN, vb);
|
|
|
|
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(ra), va);
|
|
build.inst(IrCmd::STORE_TAG, build.vmReg(ra), build.constTag(LUA_TNUMBER));
|
|
|
|
IrOp next = build.blockAtInst(pcpos + 1);
|
|
FallbackStreamScope scope(build, fallback, next);
|
|
|
|
build.inst(IrCmd::SET_SAVEDPC, build.constUint(pcpos + 1));
|
|
build.inst(IrCmd::DO_LEN, build.vmReg(LUAU_INSN_A(*pc)), build.vmReg(LUAU_INSN_B(*pc)));
|
|
build.inst(IrCmd::JUMP, next);
|
|
}
|
|
|
|
void translateInstNewTable(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
int b = LUAU_INSN_B(*pc);
|
|
uint32_t aux = pc[1];
|
|
|
|
build.inst(IrCmd::SET_SAVEDPC, build.constUint(pcpos + 1));
|
|
|
|
IrOp va = build.inst(IrCmd::NEW_TABLE, build.constUint(aux), build.constUint(b == 0 ? 0 : 1 << (b - 1)));
|
|
build.inst(IrCmd::STORE_POINTER, build.vmReg(ra), va);
|
|
build.inst(IrCmd::STORE_TAG, build.vmReg(ra), build.constTag(LUA_TTABLE));
|
|
|
|
build.inst(IrCmd::CHECK_GC);
|
|
}
|
|
|
|
void translateInstDupTable(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
int k = LUAU_INSN_D(*pc);
|
|
|
|
build.inst(IrCmd::SET_SAVEDPC, build.constUint(pcpos + 1));
|
|
|
|
IrOp table = build.inst(IrCmd::LOAD_POINTER, build.vmConst(k));
|
|
IrOp va = build.inst(IrCmd::DUP_TABLE, table);
|
|
build.inst(IrCmd::STORE_POINTER, build.vmReg(ra), va);
|
|
build.inst(IrCmd::STORE_TAG, build.vmReg(ra), build.constTag(LUA_TTABLE));
|
|
|
|
build.inst(IrCmd::CHECK_GC);
|
|
}
|
|
|
|
void translateInstGetUpval(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
int up = LUAU_INSN_B(*pc);
|
|
|
|
build.inst(IrCmd::GET_UPVALUE, build.vmReg(ra), build.vmUpvalue(up));
|
|
}
|
|
|
|
void translateInstSetUpval(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
int up = LUAU_INSN_B(*pc);
|
|
|
|
build.inst(IrCmd::SET_UPVALUE, build.vmUpvalue(up), build.vmReg(ra));
|
|
}
|
|
|
|
void translateInstCloseUpvals(IrBuilder& build, const Instruction* pc)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
|
|
build.inst(IrCmd::CLOSE_UPVALS, build.vmReg(ra));
|
|
}
|
|
|
|
void translateFastCallN(IrBuilder& build, const Instruction* pc, int pcpos, bool customParams, int customParamCount, IrOp customArgs, IrOp next)
|
|
{
|
|
int bfid = LUAU_INSN_A(*pc);
|
|
int skip = LUAU_INSN_C(*pc);
|
|
|
|
Instruction call = pc[skip + 1];
|
|
LUAU_ASSERT(LUAU_INSN_OP(call) == LOP_CALL);
|
|
int ra = LUAU_INSN_A(call);
|
|
|
|
int nparams = customParams ? customParamCount : LUAU_INSN_B(call) - 1;
|
|
int nresults = LUAU_INSN_C(call) - 1;
|
|
int arg = customParams ? LUAU_INSN_B(*pc) : ra + 1;
|
|
IrOp args = customParams ? customArgs : build.vmReg(ra + 2);
|
|
|
|
IrOp builtinArgs = args;
|
|
|
|
if (customArgs.kind == IrOpKind::VmConst)
|
|
{
|
|
TValue protok = build.function.proto->k[customArgs.index];
|
|
|
|
if (protok.tt == LUA_TNUMBER)
|
|
builtinArgs = build.constDouble(protok.value.n);
|
|
}
|
|
|
|
IrOp fallback = build.block(IrBlockKind::Fallback);
|
|
|
|
build.inst(IrCmd::CHECK_SAFE_ENV, fallback);
|
|
|
|
BuiltinImplResult br = translateBuiltin(build, LuauBuiltinFunction(bfid), ra, arg, builtinArgs, nparams, nresults, fallback);
|
|
|
|
if (br.type == BuiltinImplType::UsesFallback)
|
|
{
|
|
LUAU_ASSERT(nparams != LUA_MULTRET && "builtins are not allowed to handle variadic arguments");
|
|
|
|
if (nresults == LUA_MULTRET)
|
|
build.inst(IrCmd::ADJUST_STACK_TO_REG, build.vmReg(ra), build.constInt(br.actualResultCount));
|
|
}
|
|
else
|
|
{
|
|
// TODO: we can skip saving pc for some well-behaved builtins which we didn't inline
|
|
build.inst(IrCmd::SET_SAVEDPC, build.constUint(pcpos + 1));
|
|
|
|
IrOp res = build.inst(IrCmd::INVOKE_FASTCALL, build.constUint(bfid), build.vmReg(ra), build.vmReg(arg), args, build.constInt(nparams),
|
|
build.constInt(nresults));
|
|
build.inst(IrCmd::CHECK_FASTCALL_RES, res, fallback);
|
|
|
|
if (nresults == LUA_MULTRET)
|
|
build.inst(IrCmd::ADJUST_STACK_TO_REG, build.vmReg(ra), res);
|
|
else if (nparams == LUA_MULTRET)
|
|
build.inst(IrCmd::ADJUST_STACK_TO_TOP);
|
|
}
|
|
|
|
build.inst(IrCmd::JUMP, next);
|
|
|
|
// this will be filled with IR corresponding to instructions after FASTCALL until skip+1
|
|
build.beginBlock(fallback);
|
|
}
|
|
|
|
void translateInstForNPrep(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
|
|
IrOp loopStart = build.blockAtInst(pcpos + getOpLength(LuauOpcode(LUAU_INSN_OP(*pc))));
|
|
IrOp loopExit = build.blockAtInst(getJumpTarget(*pc, pcpos));
|
|
IrOp fallback = build.block(IrBlockKind::Fallback);
|
|
|
|
IrOp nextStep = build.block(IrBlockKind::Internal);
|
|
IrOp direct = build.block(IrBlockKind::Internal);
|
|
IrOp reverse = build.block(IrBlockKind::Internal);
|
|
|
|
IrOp tagLimit = build.inst(IrCmd::LOAD_TAG, build.vmReg(ra + 0));
|
|
build.inst(IrCmd::CHECK_TAG, tagLimit, build.constTag(LUA_TNUMBER), fallback);
|
|
IrOp tagStep = build.inst(IrCmd::LOAD_TAG, build.vmReg(ra + 1));
|
|
build.inst(IrCmd::CHECK_TAG, tagStep, build.constTag(LUA_TNUMBER), fallback);
|
|
IrOp tagIdx = build.inst(IrCmd::LOAD_TAG, build.vmReg(ra + 2));
|
|
build.inst(IrCmd::CHECK_TAG, tagIdx, build.constTag(LUA_TNUMBER), fallback);
|
|
build.inst(IrCmd::JUMP, nextStep);
|
|
|
|
// After successful conversion of arguments to number in a fallback, we return here
|
|
build.beginBlock(nextStep);
|
|
|
|
IrOp zero = build.constDouble(0.0);
|
|
IrOp limit = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(ra + 0));
|
|
IrOp step = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(ra + 1));
|
|
IrOp idx = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(ra + 2));
|
|
|
|
// step <= 0
|
|
build.inst(IrCmd::JUMP_CMP_NUM, step, zero, build.cond(IrCondition::LessEqual), reverse, direct);
|
|
|
|
// TODO: target branches can probably be arranged better, but we need tests for NaN behavior preservation
|
|
|
|
// step <= 0 is false, check idx <= limit
|
|
build.beginBlock(direct);
|
|
build.inst(IrCmd::JUMP_CMP_NUM, idx, limit, build.cond(IrCondition::LessEqual), loopStart, loopExit);
|
|
|
|
// step <= 0 is true, check limit <= idx
|
|
build.beginBlock(reverse);
|
|
build.inst(IrCmd::JUMP_CMP_NUM, limit, idx, build.cond(IrCondition::LessEqual), loopStart, loopExit);
|
|
|
|
// Fallback will try to convert loop variables to numbers or throw an error
|
|
build.beginBlock(fallback);
|
|
build.inst(IrCmd::SET_SAVEDPC, build.constUint(pcpos + 1));
|
|
build.inst(IrCmd::PREPARE_FORN, build.vmReg(ra + 0), build.vmReg(ra + 1), build.vmReg(ra + 2));
|
|
build.inst(IrCmd::JUMP, nextStep);
|
|
|
|
// Fallthrough in original bytecode is implicit, so we start next internal block here
|
|
if (build.isInternalBlock(loopStart))
|
|
build.beginBlock(loopStart);
|
|
}
|
|
|
|
void translateInstForNLoop(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
|
|
IrOp loopRepeat = build.blockAtInst(getJumpTarget(*pc, pcpos));
|
|
IrOp loopExit = build.blockAtInst(pcpos + getOpLength(LuauOpcode(LUAU_INSN_OP(*pc))));
|
|
|
|
build.inst(IrCmd::INTERRUPT, build.constUint(pcpos));
|
|
|
|
IrOp zero = build.constDouble(0.0);
|
|
IrOp limit = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(ra + 0));
|
|
IrOp step = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(ra + 1));
|
|
|
|
IrOp idx = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(ra + 2));
|
|
idx = build.inst(IrCmd::ADD_NUM, idx, step);
|
|
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(ra + 2), idx);
|
|
|
|
IrOp direct = build.block(IrBlockKind::Internal);
|
|
IrOp reverse = build.block(IrBlockKind::Internal);
|
|
|
|
// step <= 0
|
|
build.inst(IrCmd::JUMP_CMP_NUM, step, zero, build.cond(IrCondition::LessEqual), reverse, direct);
|
|
|
|
// step <= 0 is false, check idx <= limit
|
|
build.beginBlock(direct);
|
|
build.inst(IrCmd::JUMP_CMP_NUM, idx, limit, build.cond(IrCondition::LessEqual), loopRepeat, loopExit);
|
|
|
|
// step <= 0 is true, check limit <= idx
|
|
build.beginBlock(reverse);
|
|
build.inst(IrCmd::JUMP_CMP_NUM, limit, idx, build.cond(IrCondition::LessEqual), loopRepeat, loopExit);
|
|
|
|
// Fallthrough in original bytecode is implicit, so we start next internal block here
|
|
if (build.isInternalBlock(loopExit))
|
|
build.beginBlock(loopExit);
|
|
}
|
|
|
|
void translateInstForGPrepNext(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
|
|
IrOp target = build.blockAtInst(pcpos + 1 + LUAU_INSN_D(*pc));
|
|
IrOp fallback = build.block(IrBlockKind::Fallback);
|
|
|
|
// fast-path: pairs/next
|
|
build.inst(IrCmd::CHECK_SAFE_ENV, fallback);
|
|
IrOp tagB = build.inst(IrCmd::LOAD_TAG, build.vmReg(ra + 1));
|
|
build.inst(IrCmd::CHECK_TAG, tagB, build.constTag(LUA_TTABLE), fallback);
|
|
IrOp tagC = build.inst(IrCmd::LOAD_TAG, build.vmReg(ra + 2));
|
|
build.inst(IrCmd::CHECK_TAG, tagC, build.constTag(LUA_TNIL), fallback);
|
|
|
|
build.inst(IrCmd::STORE_TAG, build.vmReg(ra), build.constTag(LUA_TNIL));
|
|
|
|
// setpvalue(ra + 2, reinterpret_cast<void*>(uintptr_t(0)));
|
|
build.inst(IrCmd::STORE_INT, build.vmReg(ra + 2), build.constInt(0));
|
|
build.inst(IrCmd::STORE_TAG, build.vmReg(ra + 2), build.constTag(LUA_TLIGHTUSERDATA));
|
|
|
|
build.inst(IrCmd::JUMP, target);
|
|
|
|
build.beginBlock(fallback);
|
|
build.inst(IrCmd::FORGPREP_XNEXT_FALLBACK, build.constUint(pcpos), build.vmReg(ra), target);
|
|
}
|
|
|
|
void translateInstForGPrepInext(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
|
|
IrOp target = build.blockAtInst(pcpos + 1 + LUAU_INSN_D(*pc));
|
|
IrOp fallback = build.block(IrBlockKind::Fallback);
|
|
IrOp finish = build.block(IrBlockKind::Internal);
|
|
|
|
// fast-path: ipairs/inext
|
|
build.inst(IrCmd::CHECK_SAFE_ENV, fallback);
|
|
IrOp tagB = build.inst(IrCmd::LOAD_TAG, build.vmReg(ra + 1));
|
|
build.inst(IrCmd::CHECK_TAG, tagB, build.constTag(LUA_TTABLE), fallback);
|
|
IrOp tagC = build.inst(IrCmd::LOAD_TAG, build.vmReg(ra + 2));
|
|
build.inst(IrCmd::CHECK_TAG, tagC, build.constTag(LUA_TNUMBER), fallback);
|
|
|
|
IrOp numC = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(ra + 2));
|
|
build.inst(IrCmd::JUMP_CMP_NUM, numC, build.constDouble(0.0), build.cond(IrCondition::NotEqual), fallback, finish);
|
|
|
|
build.beginBlock(finish);
|
|
|
|
build.inst(IrCmd::STORE_TAG, build.vmReg(ra), build.constTag(LUA_TNIL));
|
|
|
|
// setpvalue(ra + 2, reinterpret_cast<void*>(uintptr_t(0)));
|
|
build.inst(IrCmd::STORE_INT, build.vmReg(ra + 2), build.constInt(0));
|
|
build.inst(IrCmd::STORE_TAG, build.vmReg(ra + 2), build.constTag(LUA_TLIGHTUSERDATA));
|
|
|
|
build.inst(IrCmd::JUMP, target);
|
|
|
|
build.beginBlock(fallback);
|
|
build.inst(IrCmd::FORGPREP_XNEXT_FALLBACK, build.constUint(pcpos), build.vmReg(ra), target);
|
|
}
|
|
|
|
void translateInstForGLoopIpairs(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
LUAU_ASSERT(int(pc[1]) < 0);
|
|
|
|
IrOp loopRepeat = build.blockAtInst(getJumpTarget(*pc, pcpos));
|
|
IrOp loopExit = build.blockAtInst(pcpos + getOpLength(LuauOpcode(LUAU_INSN_OP(*pc))));
|
|
IrOp fallback = build.block(IrBlockKind::Fallback);
|
|
|
|
IrOp hasElem = build.block(IrBlockKind::Internal);
|
|
|
|
build.inst(IrCmd::INTERRUPT, build.constUint(pcpos));
|
|
|
|
// fast-path: builtin table iteration
|
|
IrOp tagA = build.inst(IrCmd::LOAD_TAG, build.vmReg(ra));
|
|
build.inst(IrCmd::CHECK_TAG, tagA, build.constTag(LUA_TNIL), fallback);
|
|
|
|
IrOp table = build.inst(IrCmd::LOAD_POINTER, build.vmReg(ra + 1));
|
|
IrOp index = build.inst(IrCmd::LOAD_INT, build.vmReg(ra + 2));
|
|
|
|
IrOp elemPtr = build.inst(IrCmd::GET_ARR_ADDR, table, index);
|
|
|
|
// Terminate if array has ended
|
|
build.inst(IrCmd::CHECK_ARRAY_SIZE, table, index, loopExit);
|
|
|
|
// Terminate if element is nil
|
|
IrOp elemTag = build.inst(IrCmd::LOAD_TAG, elemPtr);
|
|
build.inst(IrCmd::JUMP_EQ_TAG, elemTag, build.constTag(LUA_TNIL), loopExit, hasElem);
|
|
build.beginBlock(hasElem);
|
|
|
|
IrOp nextIndex = build.inst(IrCmd::ADD_INT, index, build.constInt(1));
|
|
|
|
// We update only a dword part of the userdata pointer that's reused in loop iteration as an index
|
|
// Upper bits start and remain to be 0
|
|
build.inst(IrCmd::STORE_INT, build.vmReg(ra + 2), nextIndex);
|
|
// Tag should already be set to lightuserdata
|
|
|
|
// setnvalue(ra + 3, double(index + 1));
|
|
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(ra + 3), build.inst(IrCmd::INT_TO_NUM, nextIndex));
|
|
build.inst(IrCmd::STORE_TAG, build.vmReg(ra + 3), build.constTag(LUA_TNUMBER));
|
|
|
|
// setobj2s(L, ra + 4, e);
|
|
IrOp elemTV = build.inst(IrCmd::LOAD_TVALUE, elemPtr);
|
|
build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra + 4), elemTV);
|
|
|
|
build.inst(IrCmd::JUMP, loopRepeat);
|
|
|
|
build.beginBlock(fallback);
|
|
build.inst(IrCmd::SET_SAVEDPC, build.constUint(pcpos + 1));
|
|
build.inst(IrCmd::FORGLOOP_FALLBACK, build.vmReg(ra), build.constInt(int(pc[1])), loopRepeat, loopExit);
|
|
|
|
// Fallthrough in original bytecode is implicit, so we start next internal block here
|
|
if (build.isInternalBlock(loopExit))
|
|
build.beginBlock(loopExit);
|
|
}
|
|
|
|
void translateInstGetTableN(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
int rb = LUAU_INSN_B(*pc);
|
|
int c = LUAU_INSN_C(*pc);
|
|
|
|
IrOp fallback = build.block(IrBlockKind::Fallback);
|
|
|
|
IrOp tb = build.inst(IrCmd::LOAD_TAG, build.vmReg(rb));
|
|
build.inst(IrCmd::CHECK_TAG, tb, build.constTag(LUA_TTABLE), fallback);
|
|
|
|
IrOp vb = build.inst(IrCmd::LOAD_POINTER, build.vmReg(rb));
|
|
|
|
build.inst(IrCmd::CHECK_ARRAY_SIZE, vb, build.constInt(c), fallback);
|
|
build.inst(IrCmd::CHECK_NO_METATABLE, vb, fallback);
|
|
|
|
IrOp arrEl = build.inst(IrCmd::GET_ARR_ADDR, vb, build.constInt(c));
|
|
|
|
IrOp arrElTval = build.inst(IrCmd::LOAD_TVALUE, arrEl);
|
|
build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra), arrElTval);
|
|
|
|
IrOp next = build.blockAtInst(pcpos + 1);
|
|
FallbackStreamScope scope(build, fallback, next);
|
|
|
|
build.inst(IrCmd::SET_SAVEDPC, build.constUint(pcpos + 1));
|
|
build.inst(IrCmd::GET_TABLE, build.vmReg(ra), build.vmReg(rb), build.constUint(c + 1));
|
|
build.inst(IrCmd::JUMP, next);
|
|
}
|
|
|
|
void translateInstSetTableN(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
int rb = LUAU_INSN_B(*pc);
|
|
int c = LUAU_INSN_C(*pc);
|
|
|
|
IrOp fallback = build.block(IrBlockKind::Fallback);
|
|
|
|
IrOp tb = build.inst(IrCmd::LOAD_TAG, build.vmReg(rb));
|
|
build.inst(IrCmd::CHECK_TAG, tb, build.constTag(LUA_TTABLE), fallback);
|
|
|
|
IrOp vb = build.inst(IrCmd::LOAD_POINTER, build.vmReg(rb));
|
|
|
|
build.inst(IrCmd::CHECK_ARRAY_SIZE, vb, build.constInt(c), fallback);
|
|
build.inst(IrCmd::CHECK_NO_METATABLE, vb, fallback);
|
|
build.inst(IrCmd::CHECK_READONLY, vb, fallback);
|
|
|
|
IrOp arrEl = build.inst(IrCmd::GET_ARR_ADDR, vb, build.constInt(c));
|
|
|
|
IrOp tva = build.inst(IrCmd::LOAD_TVALUE, build.vmReg(ra));
|
|
build.inst(IrCmd::STORE_TVALUE, arrEl, tva);
|
|
|
|
build.inst(IrCmd::BARRIER_TABLE_FORWARD, vb, build.vmReg(ra));
|
|
|
|
IrOp next = build.blockAtInst(pcpos + 1);
|
|
FallbackStreamScope scope(build, fallback, next);
|
|
|
|
build.inst(IrCmd::SET_SAVEDPC, build.constUint(pcpos + 1));
|
|
build.inst(IrCmd::SET_TABLE, build.vmReg(ra), build.vmReg(rb), build.constUint(c + 1));
|
|
build.inst(IrCmd::JUMP, next);
|
|
}
|
|
|
|
void translateInstGetTable(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
int rb = LUAU_INSN_B(*pc);
|
|
int rc = LUAU_INSN_C(*pc);
|
|
|
|
IrOp fallback = build.block(IrBlockKind::Fallback);
|
|
|
|
IrOp tb = build.inst(IrCmd::LOAD_TAG, build.vmReg(rb));
|
|
build.inst(IrCmd::CHECK_TAG, tb, build.constTag(LUA_TTABLE), fallback);
|
|
IrOp tc = build.inst(IrCmd::LOAD_TAG, build.vmReg(rc));
|
|
build.inst(IrCmd::CHECK_TAG, tc, build.constTag(LUA_TNUMBER), fallback);
|
|
|
|
// fast-path: table with a number index
|
|
IrOp vb = build.inst(IrCmd::LOAD_POINTER, build.vmReg(rb));
|
|
IrOp vc = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(rc));
|
|
|
|
IrOp index = build.inst(IrCmd::TRY_NUM_TO_INDEX, vc, fallback);
|
|
|
|
index = build.inst(IrCmd::SUB_INT, index, build.constInt(1));
|
|
|
|
build.inst(IrCmd::CHECK_ARRAY_SIZE, vb, index, fallback);
|
|
build.inst(IrCmd::CHECK_NO_METATABLE, vb, fallback);
|
|
|
|
IrOp arrEl = build.inst(IrCmd::GET_ARR_ADDR, vb, index);
|
|
|
|
IrOp arrElTval = build.inst(IrCmd::LOAD_TVALUE, arrEl);
|
|
build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra), arrElTval);
|
|
|
|
IrOp next = build.blockAtInst(pcpos + 1);
|
|
FallbackStreamScope scope(build, fallback, next);
|
|
|
|
build.inst(IrCmd::SET_SAVEDPC, build.constUint(pcpos + 1));
|
|
build.inst(IrCmd::GET_TABLE, build.vmReg(ra), build.vmReg(rb), build.vmReg(rc));
|
|
build.inst(IrCmd::JUMP, next);
|
|
}
|
|
|
|
void translateInstSetTable(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
int rb = LUAU_INSN_B(*pc);
|
|
int rc = LUAU_INSN_C(*pc);
|
|
|
|
IrOp fallback = build.block(IrBlockKind::Fallback);
|
|
|
|
IrOp tb = build.inst(IrCmd::LOAD_TAG, build.vmReg(rb));
|
|
build.inst(IrCmd::CHECK_TAG, tb, build.constTag(LUA_TTABLE), fallback);
|
|
IrOp tc = build.inst(IrCmd::LOAD_TAG, build.vmReg(rc));
|
|
build.inst(IrCmd::CHECK_TAG, tc, build.constTag(LUA_TNUMBER), fallback);
|
|
|
|
// fast-path: table with a number index
|
|
IrOp vb = build.inst(IrCmd::LOAD_POINTER, build.vmReg(rb));
|
|
IrOp vc = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(rc));
|
|
|
|
IrOp index = build.inst(IrCmd::TRY_NUM_TO_INDEX, vc, fallback);
|
|
|
|
index = build.inst(IrCmd::SUB_INT, index, build.constInt(1));
|
|
|
|
build.inst(IrCmd::CHECK_ARRAY_SIZE, vb, index, fallback);
|
|
build.inst(IrCmd::CHECK_NO_METATABLE, vb, fallback);
|
|
build.inst(IrCmd::CHECK_READONLY, vb, fallback);
|
|
|
|
IrOp arrEl = build.inst(IrCmd::GET_ARR_ADDR, vb, index);
|
|
|
|
IrOp tva = build.inst(IrCmd::LOAD_TVALUE, build.vmReg(ra));
|
|
build.inst(IrCmd::STORE_TVALUE, arrEl, tva);
|
|
|
|
build.inst(IrCmd::BARRIER_TABLE_FORWARD, vb, build.vmReg(ra));
|
|
|
|
IrOp next = build.blockAtInst(pcpos + 1);
|
|
FallbackStreamScope scope(build, fallback, next);
|
|
|
|
build.inst(IrCmd::SET_SAVEDPC, build.constUint(pcpos + 1));
|
|
build.inst(IrCmd::SET_TABLE, build.vmReg(ra), build.vmReg(rb), build.vmReg(rc));
|
|
build.inst(IrCmd::JUMP, next);
|
|
}
|
|
|
|
void translateInstGetImport(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
int k = LUAU_INSN_D(*pc);
|
|
uint32_t aux = pc[1];
|
|
|
|
IrOp fastPath = build.block(IrBlockKind::Internal);
|
|
IrOp fallback = build.block(IrBlockKind::Fallback);
|
|
|
|
build.inst(IrCmd::CHECK_SAFE_ENV, fallback);
|
|
|
|
// note: if import failed, k[] is nil; we could check this during codegen, but we instead use runtime fallback
|
|
// this allows us to handle ahead-of-time codegen smoothly when an import fails to resolve at runtime
|
|
IrOp tk = build.inst(IrCmd::LOAD_TAG, build.vmConst(k));
|
|
build.inst(IrCmd::JUMP_EQ_TAG, tk, build.constTag(LUA_TNIL), fallback, fastPath);
|
|
|
|
build.beginBlock(fastPath);
|
|
|
|
IrOp tvk = build.inst(IrCmd::LOAD_TVALUE, build.vmConst(k));
|
|
build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra), tvk);
|
|
|
|
IrOp next = build.blockAtInst(pcpos + 2);
|
|
FallbackStreamScope scope(build, fallback, next);
|
|
|
|
build.inst(IrCmd::SET_SAVEDPC, build.constUint(pcpos + 1));
|
|
build.inst(IrCmd::GET_IMPORT, build.vmReg(ra), build.constUint(aux));
|
|
build.inst(IrCmd::JUMP, next);
|
|
}
|
|
|
|
void translateInstGetTableKS(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
int rb = LUAU_INSN_B(*pc);
|
|
uint32_t aux = pc[1];
|
|
|
|
IrOp fallback = build.block(IrBlockKind::Fallback);
|
|
|
|
IrOp tb = build.inst(IrCmd::LOAD_TAG, build.vmReg(rb));
|
|
build.inst(IrCmd::CHECK_TAG, tb, build.constTag(LUA_TTABLE), fallback);
|
|
|
|
IrOp vb = build.inst(IrCmd::LOAD_POINTER, build.vmReg(rb));
|
|
|
|
IrOp addrSlotEl = build.inst(IrCmd::GET_SLOT_NODE_ADDR, vb, build.constUint(pcpos));
|
|
|
|
build.inst(IrCmd::CHECK_SLOT_MATCH, addrSlotEl, build.vmConst(aux), fallback);
|
|
|
|
IrOp tvn = build.inst(IrCmd::LOAD_NODE_VALUE_TV, addrSlotEl);
|
|
build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra), tvn);
|
|
|
|
IrOp next = build.blockAtInst(pcpos + 2);
|
|
FallbackStreamScope scope(build, fallback, next);
|
|
|
|
build.inst(IrCmd::FALLBACK_GETTABLEKS, build.constUint(pcpos), build.vmReg(ra), build.vmReg(rb), build.vmConst(aux));
|
|
build.inst(IrCmd::JUMP, next);
|
|
}
|
|
|
|
void translateInstSetTableKS(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
int rb = LUAU_INSN_B(*pc);
|
|
uint32_t aux = pc[1];
|
|
|
|
IrOp fallback = build.block(IrBlockKind::Fallback);
|
|
|
|
IrOp tb = build.inst(IrCmd::LOAD_TAG, build.vmReg(rb));
|
|
build.inst(IrCmd::CHECK_TAG, tb, build.constTag(LUA_TTABLE), fallback);
|
|
|
|
IrOp vb = build.inst(IrCmd::LOAD_POINTER, build.vmReg(rb));
|
|
|
|
IrOp addrSlotEl = build.inst(IrCmd::GET_SLOT_NODE_ADDR, vb, build.constUint(pcpos));
|
|
|
|
build.inst(IrCmd::CHECK_SLOT_MATCH, addrSlotEl, build.vmConst(aux), fallback);
|
|
build.inst(IrCmd::CHECK_READONLY, vb, fallback);
|
|
|
|
IrOp tva = build.inst(IrCmd::LOAD_TVALUE, build.vmReg(ra));
|
|
build.inst(IrCmd::STORE_NODE_VALUE_TV, addrSlotEl, tva);
|
|
|
|
build.inst(IrCmd::BARRIER_TABLE_FORWARD, vb, build.vmReg(ra));
|
|
|
|
IrOp next = build.blockAtInst(pcpos + 2);
|
|
FallbackStreamScope scope(build, fallback, next);
|
|
|
|
build.inst(IrCmd::FALLBACK_SETTABLEKS, build.constUint(pcpos), build.vmReg(ra), build.vmReg(rb), build.vmConst(aux));
|
|
build.inst(IrCmd::JUMP, next);
|
|
}
|
|
|
|
void translateInstGetGlobal(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
uint32_t aux = pc[1];
|
|
|
|
IrOp fallback = build.block(IrBlockKind::Fallback);
|
|
|
|
IrOp env = build.inst(IrCmd::LOAD_ENV);
|
|
IrOp addrSlotEl = build.inst(IrCmd::GET_SLOT_NODE_ADDR, env, build.constUint(pcpos));
|
|
|
|
build.inst(IrCmd::CHECK_SLOT_MATCH, addrSlotEl, build.vmConst(aux), fallback);
|
|
|
|
IrOp tvn = build.inst(IrCmd::LOAD_NODE_VALUE_TV, addrSlotEl);
|
|
build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra), tvn);
|
|
|
|
IrOp next = build.blockAtInst(pcpos + 2);
|
|
FallbackStreamScope scope(build, fallback, next);
|
|
|
|
build.inst(IrCmd::FALLBACK_GETGLOBAL, build.constUint(pcpos), build.vmReg(ra), build.vmConst(aux));
|
|
build.inst(IrCmd::JUMP, next);
|
|
}
|
|
|
|
void translateInstSetGlobal(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
uint32_t aux = pc[1];
|
|
|
|
IrOp fallback = build.block(IrBlockKind::Fallback);
|
|
|
|
IrOp env = build.inst(IrCmd::LOAD_ENV);
|
|
IrOp addrSlotEl = build.inst(IrCmd::GET_SLOT_NODE_ADDR, env, build.constUint(pcpos));
|
|
|
|
build.inst(IrCmd::CHECK_SLOT_MATCH, addrSlotEl, build.vmConst(aux), fallback);
|
|
build.inst(IrCmd::CHECK_READONLY, env, fallback);
|
|
|
|
IrOp tva = build.inst(IrCmd::LOAD_TVALUE, build.vmReg(ra));
|
|
build.inst(IrCmd::STORE_NODE_VALUE_TV, addrSlotEl, tva);
|
|
|
|
build.inst(IrCmd::BARRIER_TABLE_FORWARD, env, build.vmReg(ra));
|
|
|
|
IrOp next = build.blockAtInst(pcpos + 2);
|
|
FallbackStreamScope scope(build, fallback, next);
|
|
|
|
build.inst(IrCmd::FALLBACK_SETGLOBAL, build.constUint(pcpos), build.vmReg(ra), build.vmConst(aux));
|
|
build.inst(IrCmd::JUMP, next);
|
|
}
|
|
|
|
void translateInstConcat(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
int rb = LUAU_INSN_B(*pc);
|
|
int rc = LUAU_INSN_C(*pc);
|
|
|
|
build.inst(IrCmd::SET_SAVEDPC, build.constUint(pcpos + 1));
|
|
build.inst(IrCmd::CONCAT, build.vmReg(rb), build.constUint(rc - rb + 1));
|
|
|
|
IrOp tvb = build.inst(IrCmd::LOAD_TVALUE, build.vmReg(rb));
|
|
build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra), tvb);
|
|
|
|
build.inst(IrCmd::CHECK_GC);
|
|
}
|
|
|
|
void translateInstCapture(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int type = LUAU_INSN_A(*pc);
|
|
int index = LUAU_INSN_B(*pc);
|
|
|
|
switch (type)
|
|
{
|
|
case LCT_VAL:
|
|
build.inst(IrCmd::CAPTURE, build.vmReg(index), build.constUint(0));
|
|
break;
|
|
case LCT_REF:
|
|
build.inst(IrCmd::CAPTURE, build.vmReg(index), build.constUint(1));
|
|
break;
|
|
case LCT_UPVAL:
|
|
build.inst(IrCmd::CAPTURE, build.vmUpvalue(index), build.constUint(0));
|
|
break;
|
|
default:
|
|
LUAU_ASSERT(!"Unknown upvalue capture type");
|
|
}
|
|
}
|
|
|
|
void translateInstNamecall(IrBuilder& build, const Instruction* pc, int pcpos)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
int rb = LUAU_INSN_B(*pc);
|
|
uint32_t aux = pc[1];
|
|
|
|
IrOp next = build.blockAtInst(pcpos + getOpLength(LOP_NAMECALL));
|
|
IrOp fallback = build.block(IrBlockKind::Fallback);
|
|
IrOp firstFastPathSuccess = build.block(IrBlockKind::Internal);
|
|
IrOp secondFastPath = build.block(IrBlockKind::Internal);
|
|
|
|
build.loadAndCheckTag(build.vmReg(rb), LUA_TTABLE, fallback);
|
|
IrOp table = build.inst(IrCmd::LOAD_POINTER, build.vmReg(rb));
|
|
|
|
LUAU_ASSERT(build.function.proto);
|
|
IrOp addrNodeEl = build.inst(IrCmd::GET_HASH_NODE_ADDR, table, build.constUint(tsvalue(&build.function.proto->k[aux])->hash));
|
|
|
|
// We use 'jump' version instead of 'check' guard because we are jumping away into a non-fallback block
|
|
// This is required by CFG live range analysis because both non-fallback blocks define the same registers
|
|
build.inst(IrCmd::JUMP_SLOT_MATCH, addrNodeEl, build.vmConst(aux), firstFastPathSuccess, secondFastPath);
|
|
|
|
build.beginBlock(firstFastPathSuccess);
|
|
build.inst(IrCmd::STORE_POINTER, build.vmReg(ra + 1), table);
|
|
build.inst(IrCmd::STORE_TAG, build.vmReg(ra + 1), build.constTag(LUA_TTABLE));
|
|
|
|
IrOp nodeEl = build.inst(IrCmd::LOAD_NODE_VALUE_TV, addrNodeEl);
|
|
build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra), nodeEl);
|
|
build.inst(IrCmd::JUMP, next);
|
|
|
|
build.beginBlock(secondFastPath);
|
|
|
|
build.inst(IrCmd::CHECK_NODE_NO_NEXT, addrNodeEl, fallback);
|
|
|
|
IrOp indexPtr = build.inst(IrCmd::TRY_CALL_FASTGETTM, table, build.constInt(TM_INDEX), fallback);
|
|
|
|
build.loadAndCheckTag(indexPtr, LUA_TTABLE, fallback);
|
|
IrOp index = build.inst(IrCmd::LOAD_POINTER, indexPtr);
|
|
|
|
IrOp addrIndexNodeEl = build.inst(IrCmd::GET_SLOT_NODE_ADDR, index, build.constUint(pcpos));
|
|
build.inst(IrCmd::CHECK_SLOT_MATCH, addrIndexNodeEl, build.vmConst(aux), fallback);
|
|
|
|
// TODO: original 'table' was clobbered by a call inside 'FASTGETTM'
|
|
// Ideally, such calls should have to effect on SSA IR values, but simple register allocator doesn't support it
|
|
IrOp table2 = build.inst(IrCmd::LOAD_POINTER, build.vmReg(rb));
|
|
build.inst(IrCmd::STORE_POINTER, build.vmReg(ra + 1), table2);
|
|
build.inst(IrCmd::STORE_TAG, build.vmReg(ra + 1), build.constTag(LUA_TTABLE));
|
|
|
|
IrOp indexNodeEl = build.inst(IrCmd::LOAD_NODE_VALUE_TV, addrIndexNodeEl);
|
|
build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra), indexNodeEl);
|
|
build.inst(IrCmd::JUMP, next);
|
|
|
|
build.beginBlock(fallback);
|
|
build.inst(IrCmd::FALLBACK_NAMECALL, build.constUint(pcpos), build.vmReg(ra), build.vmReg(rb), build.vmConst(aux));
|
|
build.inst(IrCmd::JUMP, next);
|
|
|
|
build.beginBlock(next);
|
|
}
|
|
|
|
void translateInstAndX(IrBuilder& build, const Instruction* pc, int pcpos, IrOp c)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
int rb = LUAU_INSN_B(*pc);
|
|
|
|
IrOp fallthrough = build.block(IrBlockKind::Internal);
|
|
IrOp next = build.blockAtInst(pcpos + 1);
|
|
|
|
IrOp target = (ra == rb) ? next : build.block(IrBlockKind::Internal);
|
|
|
|
build.inst(IrCmd::JUMP_IF_FALSY, build.vmReg(rb), target, fallthrough);
|
|
build.beginBlock(fallthrough);
|
|
|
|
IrOp load = build.inst(IrCmd::LOAD_TVALUE, c);
|
|
build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra), load);
|
|
build.inst(IrCmd::JUMP, next);
|
|
|
|
if (ra == rb)
|
|
{
|
|
build.beginBlock(next);
|
|
}
|
|
else
|
|
{
|
|
build.beginBlock(target);
|
|
|
|
IrOp load1 = build.inst(IrCmd::LOAD_TVALUE, build.vmReg(rb));
|
|
build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra), load1);
|
|
build.inst(IrCmd::JUMP, next);
|
|
|
|
build.beginBlock(next);
|
|
}
|
|
}
|
|
|
|
void translateInstOrX(IrBuilder& build, const Instruction* pc, int pcpos, IrOp c)
|
|
{
|
|
int ra = LUAU_INSN_A(*pc);
|
|
int rb = LUAU_INSN_B(*pc);
|
|
|
|
IrOp fallthrough = build.block(IrBlockKind::Internal);
|
|
IrOp next = build.blockAtInst(pcpos + 1);
|
|
|
|
IrOp target = (ra == rb) ? next : build.block(IrBlockKind::Internal);
|
|
|
|
build.inst(IrCmd::JUMP_IF_TRUTHY, build.vmReg(rb), target, fallthrough);
|
|
build.beginBlock(fallthrough);
|
|
|
|
IrOp load = build.inst(IrCmd::LOAD_TVALUE, c);
|
|
build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra), load);
|
|
build.inst(IrCmd::JUMP, next);
|
|
|
|
if (ra == rb)
|
|
{
|
|
build.beginBlock(next);
|
|
}
|
|
else
|
|
{
|
|
build.beginBlock(target);
|
|
|
|
IrOp load1 = build.inst(IrCmd::LOAD_TVALUE, build.vmReg(rb));
|
|
build.inst(IrCmd::STORE_TVALUE, build.vmReg(ra), load1);
|
|
build.inst(IrCmd::JUMP, next);
|
|
|
|
build.beginBlock(next);
|
|
}
|
|
}
|
|
|
|
} // namespace CodeGen
|
|
} // namespace Luau
|