13#include "mlir/Dialect/Func/IR/FuncOps.h"
14#include "mlir/Dialect/SMT/IR/SMTOps.h"
15#include "mlir/Pass/Pass.h"
16#include "mlir/Transforms/DialectConversion.h"
19#define GEN_PASS_DEF_CONVERTCOMBTOSMT
20#include "circt/Conversion/Passes.h.inc"
37 matchAndRewrite(ReplicateOp op, OpAdaptor adaptor,
38 ConversionPatternRewriter &rewriter)
const override {
39 rewriter.replaceOpWithNewOp<smt::RepeatOp>(op, op.getMultiple(),
51 matchAndRewrite(ICmpOp op, OpAdaptor adaptor,
52 ConversionPatternRewriter &rewriter)
const override {
53 if (adaptor.getPredicate() == ICmpPredicate::weq ||
54 adaptor.getPredicate() == ICmpPredicate::ceq ||
55 adaptor.getPredicate() == ICmpPredicate::wne ||
56 adaptor.getPredicate() == ICmpPredicate::cne)
57 return rewriter.notifyMatchFailure(op,
58 "comparison predicate not supported");
61 if (adaptor.getPredicate() == ICmpPredicate::eq) {
62 result = rewriter.create<smt::EqOp>(op.getLoc(), adaptor.getLhs(),
64 }
else if (adaptor.getPredicate() == ICmpPredicate::ne) {
65 result = rewriter.create<smt::DistinctOp>(op.getLoc(), adaptor.getLhs(),
68 smt::BVCmpPredicate pred;
69 switch (adaptor.getPredicate()) {
70 case ICmpPredicate::sge:
71 pred = smt::BVCmpPredicate::sge;
73 case ICmpPredicate::sgt:
74 pred = smt::BVCmpPredicate::sgt;
76 case ICmpPredicate::sle:
77 pred = smt::BVCmpPredicate::sle;
79 case ICmpPredicate::slt:
80 pred = smt::BVCmpPredicate::slt;
82 case ICmpPredicate::uge:
83 pred = smt::BVCmpPredicate::uge;
85 case ICmpPredicate::ugt:
86 pred = smt::BVCmpPredicate::ugt;
88 case ICmpPredicate::ule:
89 pred = smt::BVCmpPredicate::ule;
91 case ICmpPredicate::ult:
92 pred = smt::BVCmpPredicate::ult;
95 llvm_unreachable(
"all cases handled above");
98 result = rewriter.create<smt::BVCmpOp>(
99 op.getLoc(), pred, adaptor.getLhs(), adaptor.getRhs());
102 Value convVal = typeConverter->materializeTargetConversion(
103 rewriter, op.getLoc(), typeConverter->convertType(op.getType()),
108 rewriter.replaceOp(op, convVal);
118 matchAndRewrite(
ExtractOp op, OpAdaptor adaptor,
119 ConversionPatternRewriter &rewriter)
const override {
121 rewriter.replaceOpWithNewOp<smt::ExtractOp>(
122 op, typeConverter->convertType(op.getResult().getType()),
123 adaptor.getLowBitAttr(), adaptor.getInput());
133 matchAndRewrite(
MuxOp op, OpAdaptor adaptor,
134 ConversionPatternRewriter &rewriter)
const override {
135 Value condition = typeConverter->materializeTargetConversion(
136 rewriter, op.getLoc(), smt::BoolType::get(getContext()),
138 rewriter.replaceOpWithNewOp<smt::IteOp>(
139 op, condition, adaptor.getTrueValue(), adaptor.getFalseValue());
149 matchAndRewrite(
SubOp op, OpAdaptor adaptor,
150 ConversionPatternRewriter &rewriter)
const override {
151 Value negRhs = rewriter.create<smt::BVNegOp>(op.getLoc(), adaptor.getRhs());
152 rewriter.replaceOpWithNewOp<smt::BVAddOp>(op, adaptor.getLhs(), negRhs);
162 matchAndRewrite(
ParityOp op, OpAdaptor adaptor,
163 ConversionPatternRewriter &rewriter)
const override {
164 Location loc = op.getLoc();
166 cast<smt::BitVectorType>(adaptor.getInput().getType()).getWidth();
170 Type oneBitTy = smt::BitVectorType::get(getContext(), 1);
172 rewriter.create<smt::ExtractOp>(loc, oneBitTy, 0, adaptor.getInput());
173 for (
unsigned i = 1; i < bitwidth; ++i) {
175 rewriter.create<smt::ExtractOp>(loc, oneBitTy, i, adaptor.getInput());
176 runner = rewriter.create<smt::BVXOrOp>(loc, runner, ext);
179 rewriter.replaceOp(op, runner);
185template <
typename SourceOp,
typename TargetOp>
188 using OpAdaptor =
typename SourceOp::Adaptor;
191 matchAndRewrite(SourceOp op, OpAdaptor adaptor,
192 ConversionPatternRewriter &rewriter)
const override {
194 rewriter.replaceOpWithNewOp<TargetOp>(
197 op.getResult().getType()),
198 adaptor.getOperands());
205template <
typename SourceOp,
typename TargetOp>
208 using OpAdaptor =
typename SourceOp::Adaptor;
211 matchAndRewrite(SourceOp op, OpAdaptor adaptor,
212 ConversionPatternRewriter &rewriter)
const override {
213 Location loc = op.getLoc();
214 auto type = dyn_cast<smt::BitVectorType>(adaptor.getRhs().getType());
219 op.getResult().getType());
221 rewriter.create<smt::BVConstantOp>(loc, APInt(type.getWidth(), 0));
222 Value isZero = rewriter.create<smt::EqOp>(loc, adaptor.getRhs(), zero);
223 Value symbolicVal = rewriter.create<smt::DeclareFunOp>(loc, resultType);
225 rewriter.create<TargetOp>(loc, resultType, adaptor.getOperands());
226 rewriter.replaceOpWithNewOp<smt::IteOp>(op, isZero, symbolicVal, division);
233template <
typename SourceOp,
typename TargetOp>
236 using OpAdaptor =
typename SourceOp::Adaptor;
239 matchAndRewrite(SourceOp op, OpAdaptor adaptor,
240 ConversionPatternRewriter &rewriter)
const override {
242 ValueRange operands = adaptor.getOperands();
243 if (operands.size() < 2)
246 Value runner = operands[0];
247 for (Value operand : operands.drop_front())
248 runner = rewriter.create<TargetOp>(op.
getLoc(), runner, operand);
250 rewriter.replaceOp(op, runner);
262struct ConvertCombToSMTPass
263 :
public circt::impl::ConvertCombToSMTBase<ConvertCombToSMTPass> {
264 void runOnOperation()
override;
270 patterns.add<CombReplicateOpConversion, IcmpOpConversion, ExtractOpConversion,
271 SubOpConversion, MuxOpConversion, ParityOpConversion,
272 OneToOneOpConversion<ShlOp, smt::BVShlOp>,
273 OneToOneOpConversion<ShrUOp, smt::BVLShrOp>,
274 OneToOneOpConversion<ShrSOp, smt::BVAShrOp>,
275 DivisionOpConversion<DivSOp, smt::BVSDivOp>,
276 DivisionOpConversion<DivUOp, smt::BVUDivOp>,
277 DivisionOpConversion<ModSOp, smt::BVSRemOp>,
278 DivisionOpConversion<ModUOp, smt::BVURemOp>,
279 VariadicToBinaryOpConversion<ConcatOp, smt::ConcatOp>,
280 VariadicToBinaryOpConversion<AddOp, smt::BVAddOp>,
281 VariadicToBinaryOpConversion<MulOp, smt::BVMulOp>,
282 VariadicToBinaryOpConversion<AndOp, smt::BVAndOp>,
283 VariadicToBinaryOpConversion<OrOp, smt::BVOrOp>,
284 VariadicToBinaryOpConversion<XorOp, smt::BVXOrOp>>(
291void ConvertCombToSMTPass::runOnOperation() {
292 ConversionTarget target(getContext());
293 target.addIllegalDialect<hw::HWDialect>();
294 target.addIllegalOp<seq::FromClockOp>();
295 target.addIllegalOp<seq::ToClockOp>();
296 target.addIllegalDialect<comb::CombDialect>();
297 target.addLegalDialect<smt::SMTDialect>();
298 target.addLegalDialect<mlir::func::FuncDialect>();
300 RewritePatternSet
patterns(&getContext());
301 TypeConverter converter;
309 if (failed(mlir::applyPartialConversion(getOperation(), target,
311 return signalPassFailure();
static Location getLoc(DefSlot slot)
The InstanceGraph op interface, see InstanceGraphInterface.td for more details.
void populateHWToSMTConversionPatterns(TypeConverter &converter, RewritePatternSet &patterns)
Get the HW to SMT conversion patterns.
void populateCombToSMTConversionPatterns(TypeConverter &converter, RewritePatternSet &patterns)
Get the HW to SMT conversion patterns.
void populateHWToSMTTypeConverter(TypeConverter &converter)
Get the HW to SMT type conversions.