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b4ebad4862
luau/tests/IrBuilder.test.cpp
Andy Friesen b4ebad4862
Sync to upstream/release/569 (#878) 
All of our changes this week have been focused on the new type solver
and the JIT.

As we march toward feature parity with the old solver, we've tightened
up a bunch of lingering issues with overload resolution, unsealed
tables, and type normalization. We've also fixed a bunch of crashes and
assertion failures in the new solver.

On the JIT front, we've started work on an A64 backend, improved the IR
analysis in a bunch of cases, and implemented assembly generation for
the builtin functions `type()` and `typeof()`.

---------

Co-authored-by: Arseny Kapoulkine <arseny.kapoulkine@gmail.com>
Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com>
2023-03-24 11:03:04 -07:00

1799 lines
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// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
#include "Luau/IrBuilder.h"
#include "Luau/IrAnalysis.h"
#include "Luau/IrDump.h"
#include "Luau/IrUtils.h"
#include "Luau/OptimizeConstProp.h"
#include "Luau/OptimizeFinalX64.h"
#include "doctest.h"
#include <limits.h>
using namespace Luau::CodeGen;
class IrBuilderFixture
{
public:
void constantFold()
{
for (IrBlock& block : build.function.blocks)
{
if (block.kind == IrBlockKind::Dead)
continue;
for (size_t i = block.start; i <= block.finish; i++)
{
IrInst& inst = build.function.instructions[i];
applySubstitutions(build.function, inst);
foldConstants(build, build.function, block, uint32_t(i));
}
}
}
template<typename F>
void withOneBlock(F&& f)
{
IrOp main = build.block(IrBlockKind::Internal);
IrOp a = build.block(IrBlockKind::Internal);
build.beginBlock(main);
f(a);
build.beginBlock(a);
build.inst(IrCmd::LOP_RETURN, build.constUint(1));
};
template<typename F>
void withTwoBlocks(F&& f)
{
IrOp main = build.block(IrBlockKind::Internal);
IrOp a = build.block(IrBlockKind::Internal);
IrOp b = build.block(IrBlockKind::Internal);
build.beginBlock(main);
f(a, b);
build.beginBlock(a);
build.inst(IrCmd::LOP_RETURN, build.constUint(1));
build.beginBlock(b);
build.inst(IrCmd::LOP_RETURN, build.constUint(2));
};
void checkEq(IrOp instOp, const IrInst& inst)
{
const IrInst& target = build.function.instOp(instOp);
CHECK(target.cmd == inst.cmd);
CHECK(target.a == inst.a);
CHECK(target.b == inst.b);
CHECK(target.c == inst.c);
CHECK(target.d == inst.d);
CHECK(target.e == inst.e);
CHECK(target.f == inst.f);
}
IrBuilder build;
// Luau.VM headers are not accessible
static const int tnil = 0;
static const int tboolean = 1;
static const int tnumber = 3;
};
TEST_SUITE_BEGIN("Optimization");
TEST_CASE_FIXTURE(IrBuilderFixture, "FinalX64OptCheckTag")
{
IrOp block = build.block(IrBlockKind::Internal);
IrOp fallback = build.block(IrBlockKind::Fallback);
build.beginBlock(block);
IrOp tag1 = build.inst(IrCmd::LOAD_TAG, build.vmReg(2));
build.inst(IrCmd::CHECK_TAG, tag1, build.constTag(0), fallback);
IrOp tag2 = build.inst(IrCmd::LOAD_TAG, build.vmConst(5));
build.inst(IrCmd::CHECK_TAG, tag2, build.constTag(0), fallback);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
build.beginBlock(fallback);
build.inst(IrCmd::LOP_RETURN, build.constUint(1));
updateUseCounts(build.function);
optimizeMemoryOperandsX64(build.function);
// Load from memory is 'inlined' into CHECK_TAG
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
CHECK_TAG R2, tnil, bb_fallback_1
CHECK_TAG K5, tnil, bb_fallback_1
LOP_RETURN 0u
bb_fallback_1:
LOP_RETURN 1u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "FinalX64OptBinaryArith")
{
IrOp block = build.block(IrBlockKind::Internal);
build.beginBlock(block);
IrOp opA = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(1));
IrOp opB = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(2));
build.inst(IrCmd::ADD_NUM, opA, opB);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
updateUseCounts(build.function);
optimizeMemoryOperandsX64(build.function);
// Load from memory is 'inlined' into second argument
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
%0 = LOAD_DOUBLE R1
%2 = ADD_NUM %0, R2
LOP_RETURN 0u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "FinalX64OptEqTag1")
{
IrOp block = build.block(IrBlockKind::Internal);
IrOp trueBlock = build.block(IrBlockKind::Internal);
IrOp falseBlock = build.block(IrBlockKind::Internal);
build.beginBlock(block);
IrOp opA = build.inst(IrCmd::LOAD_TAG, build.vmReg(1));
IrOp opB = build.inst(IrCmd::LOAD_TAG, build.vmReg(2));
build.inst(IrCmd::JUMP_EQ_TAG, opA, opB, trueBlock, falseBlock);
build.beginBlock(trueBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
build.beginBlock(falseBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
updateUseCounts(build.function);
optimizeMemoryOperandsX64(build.function);
// Load from memory is 'inlined' into first argument
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
%1 = LOAD_TAG R2
JUMP_EQ_TAG R1, %1, bb_1, bb_2
bb_1:
LOP_RETURN 0u
bb_2:
LOP_RETURN 0u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "FinalX64OptEqTag2")
{
IrOp block = build.block(IrBlockKind::Internal);
IrOp trueBlock = build.block(IrBlockKind::Internal);
IrOp falseBlock = build.block(IrBlockKind::Internal);
build.beginBlock(block);
IrOp opA = build.inst(IrCmd::LOAD_TAG, build.vmReg(1));
IrOp opB = build.inst(IrCmd::LOAD_TAG, build.vmReg(2));
build.inst(IrCmd::STORE_TAG, build.vmReg(6), opA);
build.inst(IrCmd::JUMP_EQ_TAG, opA, opB, trueBlock, falseBlock);
build.beginBlock(trueBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
build.beginBlock(falseBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
updateUseCounts(build.function);
optimizeMemoryOperandsX64(build.function);
// Load from memory is 'inlined' into second argument is it can't be done for the first one
// We also swap first and second argument to generate memory access on the LHS
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
%0 = LOAD_TAG R1
STORE_TAG R6, %0
JUMP_EQ_TAG R2, %0, bb_1, bb_2
bb_1:
LOP_RETURN 0u
bb_2:
LOP_RETURN 0u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "FinalX64OptEqTag3")
{
IrOp block = build.block(IrBlockKind::Internal);
IrOp trueBlock = build.block(IrBlockKind::Internal);
IrOp falseBlock = build.block(IrBlockKind::Internal);
build.beginBlock(block);
IrOp table = build.inst(IrCmd::LOAD_POINTER, build.vmReg(1));
IrOp arrElem = build.inst(IrCmd::GET_ARR_ADDR, table, build.constInt(0));
IrOp opA = build.inst(IrCmd::LOAD_TAG, arrElem);
build.inst(IrCmd::JUMP_EQ_TAG, opA, build.constTag(0), trueBlock, falseBlock);
build.beginBlock(trueBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
build.beginBlock(falseBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
updateUseCounts(build.function);
optimizeMemoryOperandsX64(build.function);
// Load from memory is 'inlined' into first argument
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
%0 = LOAD_POINTER R1
%1 = GET_ARR_ADDR %0, 0i
%2 = LOAD_TAG %1
JUMP_EQ_TAG %2, tnil, bb_1, bb_2
bb_1:
LOP_RETURN 0u
bb_2:
LOP_RETURN 0u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "FinalX64OptJumpCmpNum")
{
IrOp block = build.block(IrBlockKind::Internal);
IrOp trueBlock = build.block(IrBlockKind::Internal);
IrOp falseBlock = build.block(IrBlockKind::Internal);
build.beginBlock(block);
IrOp opA = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(1));
IrOp opB = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(2));
build.inst(IrCmd::JUMP_CMP_NUM, opA, opB, trueBlock, falseBlock);
build.beginBlock(trueBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
build.beginBlock(falseBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
updateUseCounts(build.function);
optimizeMemoryOperandsX64(build.function);
// Load from memory is 'inlined' into first argument
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
%1 = LOAD_DOUBLE R2
JUMP_CMP_NUM R1, %1, bb_1, bb_2
bb_1:
LOP_RETURN 0u
bb_2:
LOP_RETURN 0u
)");
}
TEST_SUITE_END();
TEST_SUITE_BEGIN("ConstantFolding");
TEST_CASE_FIXTURE(IrBuilderFixture, "Numeric")
{
IrOp block = build.block(IrBlockKind::Internal);
build.beginBlock(block);
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::ADD_INT, build.constInt(10), build.constInt(20)));
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::ADD_INT, build.constInt(INT_MAX), build.constInt(1)));
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::SUB_INT, build.constInt(10), build.constInt(20)));
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::SUB_INT, build.constInt(INT_MIN), build.constInt(1)));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(0), build.inst(IrCmd::ADD_NUM, build.constDouble(2), build.constDouble(5)));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(0), build.inst(IrCmd::SUB_NUM, build.constDouble(2), build.constDouble(5)));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(0), build.inst(IrCmd::MUL_NUM, build.constDouble(2), build.constDouble(5)));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(0), build.inst(IrCmd::DIV_NUM, build.constDouble(2), build.constDouble(5)));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(0), build.inst(IrCmd::MOD_NUM, build.constDouble(5), build.constDouble(2)));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(0), build.inst(IrCmd::POW_NUM, build.constDouble(5), build.constDouble(2)));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(0), build.inst(IrCmd::MIN_NUM, build.constDouble(5), build.constDouble(2)));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(0), build.inst(IrCmd::MAX_NUM, build.constDouble(5), build.constDouble(2)));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(0), build.inst(IrCmd::UNM_NUM, build.constDouble(5)));
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::NOT_ANY, build.constTag(tnil), build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(1))));
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::NOT_ANY, build.constTag(tnumber), build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(1))));
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::NOT_ANY, build.constTag(tboolean), build.constInt(0)));
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::NOT_ANY, build.constTag(tboolean), build.constInt(1)));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(0), build.inst(IrCmd::INT_TO_NUM, build.constInt(8)));
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
updateUseCounts(build.function);
constantFold();
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
STORE_INT R0, 30i
STORE_INT R0, -2147483648i
STORE_INT R0, -10i
STORE_INT R0, 2147483647i
STORE_DOUBLE R0, 7
STORE_DOUBLE R0, -3
STORE_DOUBLE R0, 10
STORE_DOUBLE R0, 0.40000000000000002
STORE_DOUBLE R0, 1
STORE_DOUBLE R0, 25
STORE_DOUBLE R0, 2
STORE_DOUBLE R0, 5
STORE_DOUBLE R0, -5
STORE_INT R0, 1i
STORE_INT R0, 0i
STORE_INT R0, 1i
STORE_INT R0, 0i
STORE_DOUBLE R0, 8
LOP_RETURN 0u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "ControlFlowEq")
{
withTwoBlocks([this](IrOp a, IrOp b) {
build.inst(IrCmd::JUMP_EQ_TAG, build.constTag(tnil), build.constTag(tnil), a, b);
});
withTwoBlocks([this](IrOp a, IrOp b) {
build.inst(IrCmd::JUMP_EQ_TAG, build.constTag(tnil), build.constTag(tnumber), a, b);
});
withTwoBlocks([this](IrOp a, IrOp b) {
build.inst(IrCmd::JUMP_EQ_INT, build.constInt(0), build.constInt(0), a, b);
});
withTwoBlocks([this](IrOp a, IrOp b) {
build.inst(IrCmd::JUMP_EQ_INT, build.constInt(0), build.constInt(1), a, b);
});
updateUseCounts(build.function);
constantFold();
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
JUMP bb_1
bb_1:
LOP_RETURN 1u
bb_3:
JUMP bb_5
bb_5:
LOP_RETURN 2u
bb_6:
JUMP bb_7
bb_7:
LOP_RETURN 1u
bb_9:
JUMP bb_11
bb_11:
LOP_RETURN 2u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "NumToIndex")
{
withOneBlock([this](IrOp a) {
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::TRY_NUM_TO_INDEX, build.constDouble(4), a));
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
});
withOneBlock([this](IrOp a) {
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::TRY_NUM_TO_INDEX, build.constDouble(1.2), a));
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
});
withOneBlock([this](IrOp a) {
IrOp nan = build.inst(IrCmd::DIV_NUM, build.constDouble(0.0), build.constDouble(0.0));
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.inst(IrCmd::TRY_NUM_TO_INDEX, nan, a));
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
});
updateUseCounts(build.function);
constantFold();
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
STORE_INT R0, 4i
LOP_RETURN 0u
bb_2:
JUMP bb_3
bb_3:
LOP_RETURN 1u
bb_4:
JUMP bb_5
bb_5:
LOP_RETURN 1u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "Guards")
{
withOneBlock([this](IrOp a) {
build.inst(IrCmd::CHECK_TAG, build.constTag(tnumber), build.constTag(tnumber), a);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
});
withOneBlock([this](IrOp a) {
build.inst(IrCmd::CHECK_TAG, build.constTag(tnil), build.constTag(tnumber), a);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
});
updateUseCounts(build.function);
constantFold();
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
LOP_RETURN 0u
bb_2:
JUMP bb_3
bb_3:
LOP_RETURN 1u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "ControlFlowCmpNum")
{
auto compareFold = [this](IrOp lhs, IrOp rhs, IrCondition cond, bool result) {
IrOp instOp;
IrInst instExpected;
withTwoBlocks([&](IrOp a, IrOp b) {
IrOp nan = build.inst(IrCmd::DIV_NUM, build.constDouble(0.0), build.constDouble(0.0));
instOp = build.inst(
IrCmd::JUMP_CMP_NUM, lhs.kind == IrOpKind::None ? nan : lhs, rhs.kind == IrOpKind::None ? nan : rhs, build.cond(cond), a, b);
instExpected = IrInst{IrCmd::JUMP, result ? a : b};
});
updateUseCounts(build.function);
constantFold();
checkEq(instOp, instExpected);
};
IrOp nan; // Empty operand is used to signal a placement of a 'nan'
compareFold(build.constDouble(1), build.constDouble(1), IrCondition::Equal, true);
compareFold(build.constDouble(1), build.constDouble(2), IrCondition::Equal, false);
compareFold(nan, nan, IrCondition::Equal, false);
compareFold(build.constDouble(1), build.constDouble(1), IrCondition::NotEqual, false);
compareFold(build.constDouble(1), build.constDouble(2), IrCondition::NotEqual, true);
compareFold(nan, nan, IrCondition::NotEqual, true);
compareFold(build.constDouble(1), build.constDouble(1), IrCondition::Less, false);
compareFold(build.constDouble(1), build.constDouble(2), IrCondition::Less, true);
compareFold(build.constDouble(2), build.constDouble(1), IrCondition::Less, false);
compareFold(build.constDouble(1), nan, IrCondition::Less, false);
compareFold(build.constDouble(1), build.constDouble(1), IrCondition::NotLess, true);
compareFold(build.constDouble(1), build.constDouble(2), IrCondition::NotLess, false);
compareFold(build.constDouble(2), build.constDouble(1), IrCondition::NotLess, true);
compareFold(build.constDouble(1), nan, IrCondition::NotLess, true);
compareFold(build.constDouble(1), build.constDouble(1), IrCondition::LessEqual, true);
compareFold(build.constDouble(1), build.constDouble(2), IrCondition::LessEqual, true);
compareFold(build.constDouble(2), build.constDouble(1), IrCondition::LessEqual, false);
compareFold(build.constDouble(1), nan, IrCondition::LessEqual, false);
compareFold(build.constDouble(1), build.constDouble(1), IrCondition::NotLessEqual, false);
compareFold(build.constDouble(1), build.constDouble(2), IrCondition::NotLessEqual, false);
compareFold(build.constDouble(2), build.constDouble(1), IrCondition::NotLessEqual, true);
compareFold(build.constDouble(1), nan, IrCondition::NotLessEqual, true);
compareFold(build.constDouble(1), build.constDouble(1), IrCondition::Greater, false);
compareFold(build.constDouble(1), build.constDouble(2), IrCondition::Greater, false);
compareFold(build.constDouble(2), build.constDouble(1), IrCondition::Greater, true);
compareFold(build.constDouble(1), nan, IrCondition::Greater, false);
compareFold(build.constDouble(1), build.constDouble(1), IrCondition::NotGreater, true);
compareFold(build.constDouble(1), build.constDouble(2), IrCondition::NotGreater, true);
compareFold(build.constDouble(2), build.constDouble(1), IrCondition::NotGreater, false);
compareFold(build.constDouble(1), nan, IrCondition::NotGreater, true);
compareFold(build.constDouble(1), build.constDouble(1), IrCondition::GreaterEqual, true);
compareFold(build.constDouble(1), build.constDouble(2), IrCondition::GreaterEqual, false);
compareFold(build.constDouble(2), build.constDouble(1), IrCondition::GreaterEqual, true);
compareFold(build.constDouble(1), nan, IrCondition::GreaterEqual, false);
compareFold(build.constDouble(1), build.constDouble(1), IrCondition::NotGreaterEqual, false);
compareFold(build.constDouble(1), build.constDouble(2), IrCondition::NotGreaterEqual, true);
compareFold(build.constDouble(2), build.constDouble(1), IrCondition::NotGreaterEqual, false);
compareFold(build.constDouble(1), nan, IrCondition::NotGreaterEqual, true);
}
TEST_SUITE_END();
TEST_SUITE_BEGIN("ConstantPropagation");
TEST_CASE_FIXTURE(IrBuilderFixture, "RememberTagsAndValues")
{
IrOp block = build.block(IrBlockKind::Internal);
build.beginBlock(block);
build.inst(IrCmd::STORE_TAG, build.vmReg(0), build.constTag(tnumber));
build.inst(IrCmd::STORE_INT, build.vmReg(1), build.constInt(10));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(2), build.constDouble(0.5));
// We know constants from those loads
build.inst(IrCmd::STORE_TAG, build.vmReg(3), build.inst(IrCmd::LOAD_TAG, build.vmReg(0)));
build.inst(IrCmd::STORE_INT, build.vmReg(4), build.inst(IrCmd::LOAD_INT, build.vmReg(1)));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(5), build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(2)));
// We know that these overrides have no effect
build.inst(IrCmd::STORE_TAG, build.vmReg(0), build.constTag(tnumber));
build.inst(IrCmd::STORE_INT, build.vmReg(1), build.constInt(10));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(2), build.constDouble(0.5));
// But we can invalidate them with unknown values
build.inst(IrCmd::STORE_TAG, build.vmReg(0), build.inst(IrCmd::LOAD_TAG, build.vmReg(6)));
build.inst(IrCmd::STORE_INT, build.vmReg(1), build.inst(IrCmd::LOAD_INT, build.vmReg(7)));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(2), build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(8)));
// So now the constant stores have to be made
build.inst(IrCmd::STORE_TAG, build.vmReg(9), build.inst(IrCmd::LOAD_TAG, build.vmReg(0)));
build.inst(IrCmd::STORE_INT, build.vmReg(10), build.inst(IrCmd::LOAD_INT, build.vmReg(1)));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(11), build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(2)));
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
STORE_TAG R0, tnumber
STORE_INT R1, 10i
STORE_DOUBLE R2, 0.5
STORE_TAG R3, tnumber
STORE_INT R4, 10i
STORE_DOUBLE R5, 0.5
%12 = LOAD_TAG R6
STORE_TAG R0, %12
%14 = LOAD_INT R7
STORE_INT R1, %14
%16 = LOAD_DOUBLE R8
STORE_DOUBLE R2, %16
%18 = LOAD_TAG R0
STORE_TAG R9, %18
%20 = LOAD_INT R1
STORE_INT R10, %20
%22 = LOAD_DOUBLE R2
STORE_DOUBLE R11, %22
LOP_RETURN 0u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "PropagateThroughTvalue")
{
IrOp block = build.block(IrBlockKind::Internal);
build.beginBlock(block);
build.inst(IrCmd::STORE_TAG, build.vmReg(0), build.constTag(tnumber));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(0), build.constDouble(0.5));
IrOp tv = build.inst(IrCmd::LOAD_TVALUE, build.vmReg(0));
build.inst(IrCmd::STORE_TVALUE, build.vmReg(1), tv);
// We know constants from those loads
build.inst(IrCmd::STORE_TAG, build.vmReg(3), build.inst(IrCmd::LOAD_TAG, build.vmReg(1)));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(3), build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(1)));
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
STORE_TAG R0, tnumber
STORE_DOUBLE R0, 0.5
%2 = LOAD_TVALUE R0
STORE_TVALUE R1, %2
STORE_TAG R3, tnumber
STORE_DOUBLE R3, 0.5
LOP_RETURN 0u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "SkipCheckTag")
{
IrOp block = build.block(IrBlockKind::Internal);
IrOp fallback = build.block(IrBlockKind::Fallback);
build.beginBlock(block);
build.inst(IrCmd::STORE_TAG, build.vmReg(0), build.constTag(tnumber));
build.inst(IrCmd::CHECK_TAG, build.inst(IrCmd::LOAD_TAG, build.vmReg(0)), build.constTag(tnumber), fallback);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
build.beginBlock(fallback);
build.inst(IrCmd::LOP_RETURN, build.constUint(1));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
STORE_TAG R0, tnumber
LOP_RETURN 0u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "SkipOncePerBlockChecks")
{
IrOp block = build.block(IrBlockKind::Internal);
build.beginBlock(block);
build.inst(IrCmd::CHECK_SAFE_ENV);
build.inst(IrCmd::CHECK_SAFE_ENV);
build.inst(IrCmd::CHECK_GC);
build.inst(IrCmd::CHECK_GC);
build.inst(IrCmd::DO_LEN, build.vmReg(1), build.vmReg(2)); // Can make env unsafe
build.inst(IrCmd::CHECK_SAFE_ENV);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
CHECK_SAFE_ENV
CHECK_GC
DO_LEN R1, R2
CHECK_SAFE_ENV
LOP_RETURN 0u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "RememberTableState")
{
IrOp block = build.block(IrBlockKind::Internal);
IrOp fallback = build.block(IrBlockKind::Fallback);
build.beginBlock(block);
IrOp table = build.inst(IrCmd::LOAD_POINTER, build.vmReg(0));
build.inst(IrCmd::CHECK_NO_METATABLE, table, fallback);
build.inst(IrCmd::CHECK_READONLY, table, fallback);
build.inst(IrCmd::CHECK_NO_METATABLE, table, fallback);
build.inst(IrCmd::CHECK_READONLY, table, fallback);
build.inst(IrCmd::DO_LEN, build.vmReg(1), build.vmReg(2)); // Can access all heap memory
build.inst(IrCmd::CHECK_NO_METATABLE, table, fallback);
build.inst(IrCmd::CHECK_READONLY, table, fallback);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
build.beginBlock(fallback);
build.inst(IrCmd::LOP_RETURN, build.constUint(1));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
%0 = LOAD_POINTER R0
CHECK_NO_METATABLE %0, bb_fallback_1
CHECK_READONLY %0, bb_fallback_1
DO_LEN R1, R2
CHECK_NO_METATABLE %0, bb_fallback_1
CHECK_READONLY %0, bb_fallback_1
LOP_RETURN 0u
bb_fallback_1:
LOP_RETURN 1u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "SkipUselessBarriers")
{
IrOp block = build.block(IrBlockKind::Internal);
build.beginBlock(block);
build.inst(IrCmd::STORE_TAG, build.vmReg(0), build.constTag(tnumber));
IrOp table = build.inst(IrCmd::LOAD_POINTER, build.vmReg(1));
build.inst(IrCmd::BARRIER_TABLE_FORWARD, table, build.vmReg(0));
IrOp something = build.inst(IrCmd::LOAD_POINTER, build.vmReg(2));
build.inst(IrCmd::BARRIER_OBJ, something, build.vmReg(0));
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
STORE_TAG R0, tnumber
LOP_RETURN 0u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "ConcatInvalidation")
{
IrOp block = build.block(IrBlockKind::Internal);
build.beginBlock(block);
build.inst(IrCmd::STORE_TAG, build.vmReg(0), build.constTag(tnumber));
build.inst(IrCmd::STORE_INT, build.vmReg(1), build.constInt(10));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(2), build.constDouble(0.5));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(3), build.constDouble(2.0));
build.inst(IrCmd::CONCAT, build.vmReg(0), build.constUint(3));
build.inst(IrCmd::STORE_TAG, build.vmReg(4), build.inst(IrCmd::LOAD_TAG, build.vmReg(0)));
build.inst(IrCmd::STORE_INT, build.vmReg(5), build.inst(IrCmd::LOAD_INT, build.vmReg(1)));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(6), build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(2)));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(7), build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(3)));
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
STORE_TAG R0, tnumber
STORE_INT R1, 10i
STORE_DOUBLE R2, 0.5
STORE_DOUBLE R3, 2
CONCAT R0, 3u
%5 = LOAD_TAG R0
STORE_TAG R4, %5
%7 = LOAD_INT R1
STORE_INT R5, %7
%9 = LOAD_DOUBLE R2
STORE_DOUBLE R6, %9
STORE_DOUBLE R7, 2
LOP_RETURN 0u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "BuiltinFastcallsMayInvalidateMemory")
{
IrOp block = build.block(IrBlockKind::Internal);
IrOp fallback = build.block(IrBlockKind::Fallback);
build.beginBlock(block);
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(0), build.constDouble(0.5));
IrOp table = build.inst(IrCmd::LOAD_POINTER, build.vmReg(0));
build.inst(IrCmd::CHECK_NO_METATABLE, table, fallback);
build.inst(IrCmd::CHECK_READONLY, table, fallback);
build.inst(IrCmd::INVOKE_FASTCALL, build.constUint(LBF_SETMETATABLE), build.vmReg(1), build.vmReg(2), build.vmReg(3), build.constInt(3),
build.constInt(1));
build.inst(IrCmd::CHECK_NO_METATABLE, table, fallback);
build.inst(IrCmd::CHECK_READONLY, table, fallback);
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(1), build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(0))); // At least R0 wasn't touched
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
build.beginBlock(fallback);
build.inst(IrCmd::LOP_RETURN, build.constUint(1));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
STORE_DOUBLE R0, 0.5
%1 = LOAD_POINTER R0
CHECK_NO_METATABLE %1, bb_fallback_1
CHECK_READONLY %1, bb_fallback_1
%4 = INVOKE_FASTCALL 61u, R1, R2, R3, 3i, 1i
CHECK_NO_METATABLE %1, bb_fallback_1
CHECK_READONLY %1, bb_fallback_1
STORE_DOUBLE R1, 0.5
LOP_RETURN 0u
bb_fallback_1:
LOP_RETURN 1u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "RedundantStoreCheckConstantType")
{
IrOp block = build.block(IrBlockKind::Internal);
build.beginBlock(block);
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.constInt(10));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(0), build.constDouble(0.5));
build.inst(IrCmd::STORE_INT, build.vmReg(0), build.constInt(10));
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
STORE_INT R0, 10i
STORE_DOUBLE R0, 0.5
STORE_INT R0, 10i
LOP_RETURN 0u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "TagCheckPropagation")
{
IrOp block = build.block(IrBlockKind::Internal);
IrOp fallback = build.block(IrBlockKind::Fallback);
build.beginBlock(block);
IrOp unknown = build.inst(IrCmd::LOAD_TAG, build.vmReg(0));
build.inst(IrCmd::CHECK_TAG, unknown, build.constTag(tnumber), fallback);
build.inst(IrCmd::CHECK_TAG, unknown, build.constTag(tnumber), fallback);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
build.beginBlock(fallback);
build.inst(IrCmd::LOP_RETURN, build.constUint(1));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
%0 = LOAD_TAG R0
CHECK_TAG %0, tnumber, bb_fallback_1
LOP_RETURN 0u
bb_fallback_1:
LOP_RETURN 1u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "TagCheckPropagationConflicting")
{
IrOp block = build.block(IrBlockKind::Internal);
IrOp fallback = build.block(IrBlockKind::Fallback);
build.beginBlock(block);
IrOp unknown = build.inst(IrCmd::LOAD_TAG, build.vmReg(0));
build.inst(IrCmd::CHECK_TAG, unknown, build.constTag(tnumber), fallback);
build.inst(IrCmd::CHECK_TAG, unknown, build.constTag(tnil), fallback);
build.inst(IrCmd::LOP_RETURN, build.constUint(0));
build.beginBlock(fallback);
build.inst(IrCmd::LOP_RETURN, build.constUint(1));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
%0 = LOAD_TAG R0
CHECK_TAG %0, tnumber, bb_fallback_1
JUMP bb_fallback_1
bb_fallback_1:
LOP_RETURN 1u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "TruthyTestRemoval")
{
IrOp block = build.block(IrBlockKind::Internal);
IrOp trueBlock = build.block(IrBlockKind::Internal);
IrOp falseBlock = build.block(IrBlockKind::Internal);
IrOp fallback = build.block(IrBlockKind::Fallback);
build.beginBlock(block);
IrOp unknown = build.inst(IrCmd::LOAD_TAG, build.vmReg(1));
build.inst(IrCmd::CHECK_TAG, unknown, build.constTag(tnumber), fallback);
build.inst(IrCmd::JUMP_IF_TRUTHY, build.vmReg(1), trueBlock, falseBlock);
build.beginBlock(trueBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(1));
build.beginBlock(falseBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(2));
build.beginBlock(fallback);
build.inst(IrCmd::LOP_RETURN, build.constUint(3));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
%0 = LOAD_TAG R1
CHECK_TAG %0, tnumber, bb_fallback_3
JUMP bb_1
bb_1:
LOP_RETURN 1u
bb_fallback_3:
LOP_RETURN 3u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "FalsyTestRemoval")
{
IrOp block = build.block(IrBlockKind::Internal);
IrOp trueBlock = build.block(IrBlockKind::Internal);
IrOp falseBlock = build.block(IrBlockKind::Internal);
IrOp fallback = build.block(IrBlockKind::Fallback);
build.beginBlock(block);
IrOp unknown = build.inst(IrCmd::LOAD_TAG, build.vmReg(1));
build.inst(IrCmd::CHECK_TAG, unknown, build.constTag(tnumber), fallback);
build.inst(IrCmd::JUMP_IF_FALSY, build.vmReg(1), trueBlock, falseBlock);
build.beginBlock(trueBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(1));
build.beginBlock(falseBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(2));
build.beginBlock(fallback);
build.inst(IrCmd::LOP_RETURN, build.constUint(3));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
%0 = LOAD_TAG R1
CHECK_TAG %0, tnumber, bb_fallback_3
JUMP bb_2
bb_2:
LOP_RETURN 2u
bb_fallback_3:
LOP_RETURN 3u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "TagEqRemoval")
{
IrOp block = build.block(IrBlockKind::Internal);
IrOp trueBlock = build.block(IrBlockKind::Internal);
IrOp falseBlock = build.block(IrBlockKind::Internal);
build.beginBlock(block);
IrOp tag = build.inst(IrCmd::LOAD_TAG, build.vmReg(1));
build.inst(IrCmd::CHECK_TAG, tag, build.constTag(tboolean));
build.inst(IrCmd::JUMP_EQ_TAG, tag, build.constTag(tnumber), trueBlock, falseBlock);
build.beginBlock(trueBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(1));
build.beginBlock(falseBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(2));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
%0 = LOAD_TAG R1
CHECK_TAG %0, tboolean
JUMP bb_2
bb_2:
LOP_RETURN 2u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "IntEqRemoval")
{
IrOp block = build.block(IrBlockKind::Internal);
IrOp trueBlock = build.block(IrBlockKind::Internal);
IrOp falseBlock = build.block(IrBlockKind::Internal);
build.beginBlock(block);
IrOp value = build.inst(IrCmd::LOAD_INT, build.vmReg(1));
build.inst(IrCmd::STORE_INT, build.vmReg(1), build.constInt(5));
build.inst(IrCmd::JUMP_EQ_INT, value, build.constInt(5), trueBlock, falseBlock);
build.beginBlock(trueBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(1));
build.beginBlock(falseBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(2));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
STORE_INT R1, 5i
JUMP bb_1
bb_1:
LOP_RETURN 1u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "NumCmpRemoval")
{
IrOp block = build.block(IrBlockKind::Internal);
IrOp trueBlock = build.block(IrBlockKind::Internal);
IrOp falseBlock = build.block(IrBlockKind::Internal);
build.beginBlock(block);
IrOp value = build.inst(IrCmd::LOAD_DOUBLE, build.vmReg(1));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(1), build.constDouble(4.0));
build.inst(IrCmd::JUMP_CMP_NUM, value, build.constDouble(8.0), build.cond(IrCondition::Greater), trueBlock, falseBlock);
build.beginBlock(trueBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(1));
build.beginBlock(falseBlock);
build.inst(IrCmd::LOP_RETURN, build.constUint(2));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
STORE_DOUBLE R1, 4
JUMP bb_2
bb_2:
LOP_RETURN 2u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "DataFlowsThroughDirectJumpToUniqueSuccessor")
{
IrOp block1 = build.block(IrBlockKind::Internal);
IrOp block2 = build.block(IrBlockKind::Internal);
build.beginBlock(block1);
build.inst(IrCmd::STORE_TAG, build.vmReg(0), build.constTag(tnumber));
build.inst(IrCmd::JUMP, block2);
build.beginBlock(block2);
build.inst(IrCmd::STORE_TAG, build.vmReg(1), build.inst(IrCmd::LOAD_TAG, build.vmReg(0)));
build.inst(IrCmd::LOP_RETURN, build.constUint(1));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
STORE_TAG R0, tnumber
JUMP bb_1
bb_1:
STORE_TAG R1, tnumber
LOP_RETURN 1u
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "DataDoesNotFlowThroughDirectJumpToNonUniqueSuccessor")
{
IrOp block1 = build.block(IrBlockKind::Internal);
IrOp block2 = build.block(IrBlockKind::Internal);
IrOp block3 = build.block(IrBlockKind::Internal);
build.beginBlock(block1);
build.inst(IrCmd::STORE_TAG, build.vmReg(0), build.constTag(tnumber));
build.inst(IrCmd::JUMP, block2);
build.beginBlock(block2);
build.inst(IrCmd::STORE_TAG, build.vmReg(1), build.inst(IrCmd::LOAD_TAG, build.vmReg(0)));
build.inst(IrCmd::LOP_RETURN, build.constUint(1));
build.beginBlock(block3);
build.inst(IrCmd::JUMP, block2);
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
STORE_TAG R0, tnumber
JUMP bb_1
bb_1:
%2 = LOAD_TAG R0
STORE_TAG R1, %2
LOP_RETURN 1u
bb_2:
JUMP bb_1
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "EntryBlockUseRemoval")
{
IrOp entry = build.block(IrBlockKind::Internal);
IrOp exit = build.block(IrBlockKind::Internal);
IrOp repeat = build.block(IrBlockKind::Internal);
build.beginBlock(entry);
build.inst(IrCmd::STORE_TAG, build.vmReg(0), build.constTag(tnumber));
build.inst(IrCmd::JUMP_IF_TRUTHY, build.vmReg(0), exit, repeat);
build.beginBlock(exit);
build.inst(IrCmd::LOP_RETURN, build.vmReg(0), build.constInt(0));
build.beginBlock(repeat);
build.inst(IrCmd::INTERRUPT, build.constUint(0));
build.inst(IrCmd::JUMP, entry);
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
STORE_TAG R0, tnumber
JUMP bb_1
bb_1:
LOP_RETURN R0, 0i
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "RecursiveSccUseRemoval1")
{
IrOp entry = build.block(IrBlockKind::Internal);
IrOp block = build.block(IrBlockKind::Internal);
IrOp exit = build.block(IrBlockKind::Internal);
IrOp repeat = build.block(IrBlockKind::Internal);
build.beginBlock(entry);
build.inst(IrCmd::LOP_RETURN, build.vmReg(0), build.constInt(0));
build.beginBlock(block);
build.inst(IrCmd::STORE_TAG, build.vmReg(0), build.constTag(tnumber));
build.inst(IrCmd::JUMP_IF_TRUTHY, build.vmReg(0), exit, repeat);
build.beginBlock(exit);
build.inst(IrCmd::LOP_RETURN, build.vmReg(0), build.constInt(0));
build.beginBlock(repeat);
build.inst(IrCmd::INTERRUPT, build.constUint(0));
build.inst(IrCmd::JUMP, block);
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
LOP_RETURN R0, 0i
bb_1:
STORE_TAG R0, tnumber
JUMP bb_2
bb_2:
LOP_RETURN R0, 0i
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "RecursiveSccUseRemoval2")
{
IrOp entry = build.block(IrBlockKind::Internal);
IrOp exit1 = build.block(IrBlockKind::Internal);
IrOp block = build.block(IrBlockKind::Internal);
IrOp exit2 = build.block(IrBlockKind::Internal);
IrOp repeat = build.block(IrBlockKind::Internal);
build.beginBlock(entry);
build.inst(IrCmd::JUMP_EQ_INT, build.constInt(0), build.constInt(1), block, exit1);
build.beginBlock(exit1);
build.inst(IrCmd::LOP_RETURN, build.vmReg(0), build.constInt(0));
build.beginBlock(block);
build.inst(IrCmd::STORE_TAG, build.vmReg(0), build.constTag(tnumber));
build.inst(IrCmd::JUMP_IF_TRUTHY, build.vmReg(0), exit2, repeat);
build.beginBlock(exit2);
build.inst(IrCmd::LOP_RETURN, build.vmReg(0), build.constInt(0));
build.beginBlock(repeat);
build.inst(IrCmd::INTERRUPT, build.constUint(0));
build.inst(IrCmd::JUMP, block);
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
JUMP bb_1
bb_1:
LOP_RETURN R0, 0i
bb_2:
STORE_TAG R0, tnumber
JUMP bb_3
bb_3:
LOP_RETURN R0, 0i
)");
}
TEST_SUITE_END();
TEST_SUITE_BEGIN("LinearExecutionFlowExtraction");
TEST_CASE_FIXTURE(IrBuilderFixture, "SimplePathExtraction")
{
IrOp block1 = build.block(IrBlockKind::Internal);
IrOp fallback1 = build.block(IrBlockKind::Fallback);
IrOp block2 = build.block(IrBlockKind::Internal);
IrOp fallback2 = build.block(IrBlockKind::Fallback);
IrOp block3 = build.block(IrBlockKind::Internal);
IrOp block4 = build.block(IrBlockKind::Internal);
build.beginBlock(block1);
IrOp tag1 = build.inst(IrCmd::LOAD_TAG, build.vmReg(2));
build.inst(IrCmd::CHECK_TAG, tag1, build.constTag(tnumber), fallback1);
build.inst(IrCmd::JUMP, block2);
build.beginBlock(fallback1);
build.inst(IrCmd::DO_LEN, build.vmReg(1), build.vmReg(2));
build.inst(IrCmd::JUMP, block2);
build.beginBlock(block2);
IrOp tag2 = build.inst(IrCmd::LOAD_TAG, build.vmReg(2));
build.inst(IrCmd::CHECK_TAG, tag2, build.constTag(tnumber), fallback2);
build.inst(IrCmd::JUMP, block3);
build.beginBlock(fallback2);
build.inst(IrCmd::DO_LEN, build.vmReg(0), build.vmReg(2));
build.inst(IrCmd::JUMP, block3);
build.beginBlock(block3);
build.inst(IrCmd::JUMP, block4);
build.beginBlock(block4);
build.inst(IrCmd::LOP_RETURN, build.vmReg(0), build.constInt(0));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
%0 = LOAD_TAG R2
CHECK_TAG %0, tnumber, bb_fallback_1
JUMP bb_linear_6
bb_fallback_1:
DO_LEN R1, R2
JUMP bb_2
bb_2:
%5 = LOAD_TAG R2
CHECK_TAG %5, tnumber, bb_fallback_3
JUMP bb_4
bb_fallback_3:
DO_LEN R0, R2
JUMP bb_4
bb_4:
JUMP bb_5
bb_5:
LOP_RETURN R0, 0i
bb_linear_6:
LOP_RETURN R0, 0i
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "NoPathExtractionForBlocksWithLiveOutValues")
{
IrOp block1 = build.block(IrBlockKind::Internal);
IrOp fallback1 = build.block(IrBlockKind::Fallback);
IrOp block2 = build.block(IrBlockKind::Internal);
IrOp fallback2 = build.block(IrBlockKind::Fallback);
IrOp block3 = build.block(IrBlockKind::Internal);
IrOp block4a = build.block(IrBlockKind::Internal);
IrOp block4b = build.block(IrBlockKind::Internal);
build.beginBlock(block1);
IrOp tag1 = build.inst(IrCmd::LOAD_TAG, build.vmReg(2));
build.inst(IrCmd::CHECK_TAG, tag1, build.constTag(tnumber), fallback1);
build.inst(IrCmd::JUMP, block2);
build.beginBlock(fallback1);
build.inst(IrCmd::DO_LEN, build.vmReg(1), build.vmReg(2));
build.inst(IrCmd::JUMP, block2);
build.beginBlock(block2);
IrOp tag2 = build.inst(IrCmd::LOAD_TAG, build.vmReg(2));
build.inst(IrCmd::CHECK_TAG, tag2, build.constTag(tnumber), fallback2);
build.inst(IrCmd::JUMP, block3);
build.beginBlock(fallback2);
build.inst(IrCmd::DO_LEN, build.vmReg(0), build.vmReg(2));
build.inst(IrCmd::JUMP, block3);
build.beginBlock(block3);
IrOp tag3a = build.inst(IrCmd::LOAD_TAG, build.vmReg(3));
build.inst(IrCmd::JUMP_EQ_TAG, tag3a, build.constTag(tnil), block4a, block4b);
build.beginBlock(block4a);
build.inst(IrCmd::STORE_TAG, build.vmReg(0), tag3a);
build.inst(IrCmd::LOP_RETURN, build.vmReg(0), build.constInt(0));
build.beginBlock(block4b);
build.inst(IrCmd::STORE_TAG, build.vmReg(0), tag3a);
build.inst(IrCmd::LOP_RETURN, build.vmReg(0), build.constInt(0));
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
%0 = LOAD_TAG R2
CHECK_TAG %0, tnumber, bb_fallback_1
JUMP bb_2
bb_fallback_1:
DO_LEN R1, R2
JUMP bb_2
bb_2:
%5 = LOAD_TAG R2
CHECK_TAG %5, tnumber, bb_fallback_3
JUMP bb_4
bb_fallback_3:
DO_LEN R0, R2
JUMP bb_4
bb_4:
%10 = LOAD_TAG R3
JUMP_EQ_TAG %10, tnil, bb_5, bb_6
bb_5:
STORE_TAG R0, %10
LOP_RETURN R0, 0i
bb_6:
STORE_TAG R0, %10
LOP_RETURN R0, 0i
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "InfiniteLoopInPathAnalysis")
{
IrOp block1 = build.block(IrBlockKind::Internal);
IrOp block2 = build.block(IrBlockKind::Internal);
build.beginBlock(block1);
build.inst(IrCmd::STORE_TAG, build.vmReg(0), build.constTag(tnumber));
build.inst(IrCmd::JUMP, block2);
build.beginBlock(block2);
build.inst(IrCmd::STORE_TAG, build.vmReg(1), build.constTag(tboolean));
build.inst(IrCmd::JUMP, block2);
updateUseCounts(build.function);
constPropInBlockChains(build);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
STORE_TAG R0, tnumber
JUMP bb_1
bb_1:
STORE_TAG R1, tboolean
JUMP bb_1
)");
}
TEST_SUITE_END();
TEST_SUITE_BEGIN("Analysis");
TEST_CASE_FIXTURE(IrBuilderFixture, "SimpleDiamond")
{
IrOp entry = build.block(IrBlockKind::Internal);
IrOp a = build.block(IrBlockKind::Internal);
IrOp b = build.block(IrBlockKind::Internal);
IrOp exit = build.block(IrBlockKind::Internal);
build.beginBlock(entry);
build.inst(IrCmd::JUMP_EQ_TAG, build.inst(IrCmd::LOAD_TAG, build.vmReg(0)), build.constTag(tnumber), a, b);
build.beginBlock(a);
build.inst(IrCmd::STORE_TVALUE, build.vmReg(2), build.inst(IrCmd::LOAD_TVALUE, build.vmReg(1)));
build.inst(IrCmd::JUMP, exit);
build.beginBlock(b);
build.inst(IrCmd::STORE_TVALUE, build.vmReg(3), build.inst(IrCmd::LOAD_TVALUE, build.vmReg(1)));
build.inst(IrCmd::JUMP, exit);
build.beginBlock(exit);
build.inst(IrCmd::LOP_RETURN, build.vmReg(2), build.constInt(2));
updateUseCounts(build.function);
computeCfgInfo(build.function);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
; successors: bb_1, bb_2
; in regs: R0, R1, R2, R3
; out regs: R1, R2, R3
%0 = LOAD_TAG R0
JUMP_EQ_TAG %0, tnumber, bb_1, bb_2
bb_1:
; predecessors: bb_0
; successors: bb_3
; in regs: R1, R3
; out regs: R2, R3
%2 = LOAD_TVALUE R1
STORE_TVALUE R2, %2
JUMP bb_3
bb_2:
; predecessors: bb_0
; successors: bb_3
; in regs: R1, R2
; out regs: R2, R3
%5 = LOAD_TVALUE R1
STORE_TVALUE R3, %5
JUMP bb_3
bb_3:
; predecessors: bb_1, bb_2
; in regs: R2, R3
LOP_RETURN R2, 2i
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "ImplicitFixedRegistersInVarargCall")
{
IrOp entry = build.block(IrBlockKind::Internal);
IrOp exit = build.block(IrBlockKind::Internal);
build.beginBlock(entry);
build.inst(IrCmd::FALLBACK_GETVARARGS, build.constUint(0), build.vmReg(3), build.constInt(-1));
build.inst(IrCmd::LOP_CALL, build.vmReg(0), build.constInt(-1), build.constInt(5));
build.inst(IrCmd::JUMP, exit);
build.beginBlock(exit);
build.inst(IrCmd::LOP_RETURN, build.vmReg(0), build.constInt(5));
updateUseCounts(build.function);
computeCfgInfo(build.function);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
; successors: bb_1
; in regs: R0, R1, R2
; out regs: R0, R1, R2, R3, R4
FALLBACK_GETVARARGS 0u, R3, -1i
LOP_CALL R0, -1i, 5i
JUMP bb_1
bb_1:
; predecessors: bb_0
; in regs: R0, R1, R2, R3, R4
LOP_RETURN R0, 5i
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "ExplicitUseOfRegisterInVarargSequence")
{
IrOp entry = build.block(IrBlockKind::Internal);
IrOp exit = build.block(IrBlockKind::Internal);
build.beginBlock(entry);
build.inst(IrCmd::FALLBACK_GETVARARGS, build.constUint(0), build.vmReg(1), build.constInt(-1));
IrOp results = build.inst(
IrCmd::INVOKE_FASTCALL, build.constUint(0), build.vmReg(0), build.vmReg(1), build.vmReg(2), build.constInt(-1), build.constInt(-1));
build.inst(IrCmd::ADJUST_STACK_TO_REG, build.vmReg(0), results);
build.inst(IrCmd::JUMP, exit);
build.beginBlock(exit);
build.inst(IrCmd::LOP_RETURN, build.vmReg(0), build.constInt(-1));
updateUseCounts(build.function);
computeCfgInfo(build.function);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
; successors: bb_1
; out regs: R0...
FALLBACK_GETVARARGS 0u, R1, -1i
%1 = INVOKE_FASTCALL 0u, R0, R1, R2, -1i, -1i
ADJUST_STACK_TO_REG R0, %1
JUMP bb_1
bb_1:
; predecessors: bb_0
; in regs: R0...
LOP_RETURN R0, -1i
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "VariadicSequenceRestart")
{
IrOp entry = build.block(IrBlockKind::Internal);
IrOp exit = build.block(IrBlockKind::Internal);
build.beginBlock(entry);
build.inst(IrCmd::LOP_CALL, build.vmReg(1), build.constInt(0), build.constInt(-1));
build.inst(IrCmd::LOP_CALL, build.vmReg(0), build.constInt(-1), build.constInt(-1));
build.inst(IrCmd::JUMP, exit);
build.beginBlock(exit);
build.inst(IrCmd::LOP_RETURN, build.vmReg(0), build.constInt(-1));
updateUseCounts(build.function);
computeCfgInfo(build.function);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
; successors: bb_1
; in regs: R0, R1
; out regs: R0...
LOP_CALL R1, 0i, -1i
LOP_CALL R0, -1i, -1i
JUMP bb_1
bb_1:
; predecessors: bb_0
; in regs: R0...
LOP_RETURN R0, -1i
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "FallbackDoesNotFlowUp")
{
IrOp entry = build.block(IrBlockKind::Internal);
IrOp fallback = build.block(IrBlockKind::Fallback);
IrOp exit = build.block(IrBlockKind::Internal);
build.beginBlock(entry);
build.inst(IrCmd::FALLBACK_GETVARARGS, build.constUint(0), build.vmReg(1), build.constInt(-1));
build.inst(IrCmd::CHECK_TAG, build.inst(IrCmd::LOAD_TAG, build.vmReg(0)), build.constTag(tnumber), fallback);
build.inst(IrCmd::LOP_CALL, build.vmReg(0), build.constInt(-1), build.constInt(-1));
build.inst(IrCmd::JUMP, exit);
build.beginBlock(fallback);
build.inst(IrCmd::LOP_CALL, build.vmReg(0), build.constInt(-1), build.constInt(-1));
build.inst(IrCmd::JUMP, exit);
build.beginBlock(exit);
build.inst(IrCmd::LOP_RETURN, build.vmReg(0), build.constInt(-1));
updateUseCounts(build.function);
computeCfgInfo(build.function);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
; successors: bb_fallback_1, bb_2
; in regs: R0
; out regs: R0...
FALLBACK_GETVARARGS 0u, R1, -1i
%1 = LOAD_TAG R0
CHECK_TAG %1, tnumber, bb_fallback_1
LOP_CALL R0, -1i, -1i
JUMP bb_2
bb_fallback_1:
; predecessors: bb_0
; successors: bb_2
; in regs: R0, R1...
; out regs: R0...
LOP_CALL R0, -1i, -1i
JUMP bb_2
bb_2:
; predecessors: bb_0, bb_fallback_1
; in regs: R0...
LOP_RETURN R0, -1i
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "VariadicSequencePeeling")
{
IrOp entry = build.block(IrBlockKind::Internal);
IrOp a = build.block(IrBlockKind::Internal);
IrOp b = build.block(IrBlockKind::Internal);
IrOp exit = build.block(IrBlockKind::Internal);
build.beginBlock(entry);
build.inst(IrCmd::FALLBACK_GETVARARGS, build.constUint(0), build.vmReg(3), build.constInt(-1));
build.inst(IrCmd::JUMP_EQ_TAG, build.inst(IrCmd::LOAD_TAG, build.vmReg(0)), build.constTag(tnumber), a, b);
build.beginBlock(a);
build.inst(IrCmd::STORE_TVALUE, build.vmReg(2), build.inst(IrCmd::LOAD_TVALUE, build.vmReg(0)));
build.inst(IrCmd::JUMP, exit);
build.beginBlock(b);
build.inst(IrCmd::STORE_TVALUE, build.vmReg(2), build.inst(IrCmd::LOAD_TVALUE, build.vmReg(1)));
build.inst(IrCmd::JUMP, exit);
build.beginBlock(exit);
build.inst(IrCmd::LOP_RETURN, build.vmReg(2), build.constInt(-1));
updateUseCounts(build.function);
computeCfgInfo(build.function);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
; successors: bb_1, bb_2
; in regs: R0, R1
; out regs: R0, R1, R3...
FALLBACK_GETVARARGS 0u, R3, -1i
%1 = LOAD_TAG R0
JUMP_EQ_TAG %1, tnumber, bb_1, bb_2
bb_1:
; predecessors: bb_0
; successors: bb_3
; in regs: R0, R3...
; out regs: R2...
%3 = LOAD_TVALUE R0
STORE_TVALUE R2, %3
JUMP bb_3
bb_2:
; predecessors: bb_0
; successors: bb_3
; in regs: R1, R3...
; out regs: R2...
%6 = LOAD_TVALUE R1
STORE_TVALUE R2, %6
JUMP bb_3
bb_3:
; predecessors: bb_1, bb_2
; in regs: R2...
LOP_RETURN R2, -1i
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "BuiltinVariadicStart")
{
IrOp entry = build.block(IrBlockKind::Internal);
IrOp exit = build.block(IrBlockKind::Internal);
build.beginBlock(entry);
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(1), build.constDouble(1.0));
build.inst(IrCmd::STORE_DOUBLE, build.vmReg(2), build.constDouble(2.0));
build.inst(IrCmd::ADJUST_STACK_TO_REG, build.vmReg(2), build.constInt(1));
build.inst(IrCmd::LOP_CALL, build.vmReg(1), build.constInt(-1), build.constInt(1));
build.inst(IrCmd::JUMP, exit);
build.beginBlock(exit);
build.inst(IrCmd::LOP_RETURN, build.vmReg(0), build.constInt(2));
updateUseCounts(build.function);
computeCfgInfo(build.function);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
; successors: bb_1
; in regs: R0
; out regs: R0, R1
STORE_DOUBLE R1, 1
STORE_DOUBLE R2, 2
ADJUST_STACK_TO_REG R2, 1i
LOP_CALL R1, -1i, 1i
JUMP bb_1
bb_1:
; predecessors: bb_0
; in regs: R0, R1
LOP_RETURN R0, 2i
)");
}
TEST_CASE_FIXTURE(IrBuilderFixture, "SetTable")
{
IrOp entry = build.block(IrBlockKind::Internal);
build.beginBlock(entry);
build.inst(IrCmd::SET_TABLE, build.vmReg(0), build.vmReg(1), build.constUint(1));
build.inst(IrCmd::LOP_RETURN, build.vmReg(0), build.constInt(1));
updateUseCounts(build.function);
computeCfgInfo(build.function);
CHECK("\n" + toString(build.function, /* includeUseInfo */ false) == R"(
bb_0:
; in regs: R0, R1
SET_TABLE R0, R1, 1u
LOP_RETURN R0, 1i
)");
}
TEST_SUITE_END();
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