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//===- TestEmulateNarrowType.cpp - Test Narrow Type Emulation ------*- c++
//-*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "mlir/Dialect/Affine/IR/AffineOps.h"
#include "mlir/Dialect/Arith/IR/Arith.h"
#include "mlir/Dialect/Arith/Transforms/NarrowTypeEmulationConverter.h"
#include "mlir/Dialect/Arith/Transforms/Passes.h"
#include "mlir/Dialect/Func/IR/FuncOps.h"
#include "mlir/Dialect/MemRef/IR/MemRef.h"
#include "mlir/Dialect/MemRef/Transforms/Transforms.h"
#include "mlir/Dialect/Vector/IR/VectorOps.h"
#include "mlir/Dialect/Vector/Transforms/VectorRewritePatterns.h"
#include "mlir/Pass/Pass.h"
#include "mlir/Transforms/DialectConversion.h"
#include "mlir/Transforms/GreedyPatternRewriteDriver.h"
using namespace mlir;
namespace {
struct TestEmulateNarrowTypePass
: public PassWrapper<TestEmulateNarrowTypePass,
OperationPass<func::FuncOp>> {
MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(TestEmulateNarrowTypePass)
TestEmulateNarrowTypePass() = default;
TestEmulateNarrowTypePass(const TestEmulateNarrowTypePass &pass)
: PassWrapper(pass) {}
void getDependentDialects(DialectRegistry ®istry) const override {
registry
.insert<arith::ArithDialect, func::FuncDialect, memref::MemRefDialect,
vector::VectorDialect, affine::AffineDialect>();
}
StringRef getArgument() const final { return "test-emulate-narrow-int"; }
StringRef getDescription() const final {
return "Function pass to test Narrow Integer Emulation";
}
void runOnOperation() override {
if (!llvm::isPowerOf2_32(loadStoreEmulateBitwidth) ||
loadStoreEmulateBitwidth < 8) {
signalPassFailure();
return;
}
Operation *op = getOperation();
MLIRContext *ctx = op->getContext();
arith::NarrowTypeEmulationConverter typeConverter(loadStoreEmulateBitwidth);
// Convert scalar type.
typeConverter.addConversion([this](IntegerType ty) -> std::optional<Type> {
unsigned width = ty.getWidth();
if (width >= arithComputeBitwidth)
return ty;
return IntegerType::get(ty.getContext(), arithComputeBitwidth);
});
// Convert vector type.
typeConverter.addConversion([this](VectorType ty) -> std::optional<Type> {
auto intTy = dyn_cast<IntegerType>(ty.getElementType());
if (!intTy)
return ty;
unsigned width = intTy.getWidth();
if (width >= arithComputeBitwidth)
return ty;
return VectorType::get(
to_vector(ty.getShape()),
IntegerType::get(ty.getContext(), arithComputeBitwidth));
});
// With the type converter enabled, we are effectively unable to write
// negative tests. This is a workaround specifically for negative tests.
if (!disableMemrefTypeConversion)
memref::populateMemRefNarrowTypeEmulationConversions(typeConverter);
ConversionTarget target(*ctx);
target.addDynamicallyLegalOp<func::FuncOp>([&typeConverter](Operation *op) {
return typeConverter.isLegal(cast<func::FuncOp>(op).getFunctionType());
});
auto opLegalCallback = [&typeConverter](Operation *op) {
return typeConverter.isLegal(op);
};
target.addDynamicallyLegalOp<func::CallOp, func::ReturnOp>(opLegalCallback);
target.addDynamicallyLegalDialect<
arith::ArithDialect, vector::VectorDialect, memref::MemRefDialect,
affine::AffineDialect>(opLegalCallback);
RewritePatternSet patterns(ctx);
arith::populateArithNarrowTypeEmulationPatterns(typeConverter, patterns);
memref::populateMemRefNarrowTypeEmulationPatterns(typeConverter, patterns);
vector::populateVectorNarrowTypeEmulationPatterns(typeConverter, patterns,
disableAtomicRMW);
if (failed(applyPartialConversion(op, target, std::move(patterns))))
signalPassFailure();
}
Option<unsigned> loadStoreEmulateBitwidth{
*this, "memref-load-bitwidth",
llvm::cl::desc("memref load/store emulation bit width"),
llvm::cl::init(8)};
Option<unsigned> arithComputeBitwidth{
*this, "arith-compute-bitwidth",
llvm::cl::desc("arith computation bit width"), llvm::cl::init(4)};
Option<bool> disableMemrefTypeConversion{
*this, "skip-memref-type-conversion",
llvm::cl::desc("disable memref type conversion (to test failures)"),
llvm::cl::init(false)};
Option<bool> disableAtomicRMW{
*this, "disable-atomic-rmw",
llvm::cl::desc("disable atomic read-modify-write and prefer generating "
"normal sequence"),
llvm::cl::init(false)};
};
struct TestMemRefFlattenAndVectorNarrowTypeEmulationPass
: public PassWrapper<TestMemRefFlattenAndVectorNarrowTypeEmulationPass,
OperationPass<func::FuncOp>> {
MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(
TestMemRefFlattenAndVectorNarrowTypeEmulationPass)
TestMemRefFlattenAndVectorNarrowTypeEmulationPass() = default;
TestMemRefFlattenAndVectorNarrowTypeEmulationPass(
const TestMemRefFlattenAndVectorNarrowTypeEmulationPass &pass)
: PassWrapper(pass) {}
void getDependentDialects(DialectRegistry ®istry) const override {
registry
.insert<arith::ArithDialect, func::FuncDialect, memref::MemRefDialect,
vector::VectorDialect, affine::AffineDialect>();
}
StringRef getArgument() const final {
return "test-memref-flatten-and-vector-narrow-type-emulation";
}
StringRef getDescription() const final {
return "Test MemRef flattening and vector narrow type emulation patterns";
}
void runOnOperation() override {
Operation *op = getOperation();
MLIRContext *ctx = &getContext();
// Create a type converter for narrow type emulation (8-bit)
arith::NarrowTypeEmulationConverter typeConverter(8);
// Add conversions for memref types with i4 elements
memref::populateMemRefNarrowTypeEmulationConversions(typeConverter);
ConversionTarget target(*ctx);
target.addDynamicallyLegalOp<func::FuncOp>([&typeConverter](Operation *op) {
return typeConverter.isLegal(cast<func::FuncOp>(op).getFunctionType());
});
auto opLegalCallback = [&typeConverter](Operation *op) {
return typeConverter.isLegal(op);
};
target.addDynamicallyLegalOp<func::CallOp, func::ReturnOp>(opLegalCallback);
target.addDynamicallyLegalDialect<
arith::ArithDialect, vector::VectorDialect, memref::MemRefDialect,
affine::AffineDialect>(opLegalCallback);
RewritePatternSet patterns(ctx);
// This is necessary for the purpose of emulating `memref.alloc` and
// function boundaries.
memref::populateMemRefNarrowTypeEmulationPatterns(typeConverter, patterns);
vector::populateMemRefFlattenAndVectorNarrowTypeEmulationPatterns(
typeConverter, patterns);
// Apply partial conversion
if (failed(applyPartialConversion(op, target, std::move(patterns))))
signalPassFailure();
}
};
} // namespace
namespace mlir::test {
void registerTestEmulateNarrowTypePass() {
PassRegistration<TestEmulateNarrowTypePass>();
PassRegistration<TestMemRefFlattenAndVectorNarrowTypeEmulationPass>();
}
} // namespace mlir::test
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