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");
60 if (adaptor.getPredicate() == ICmpPredicate::eq) {
61 rewriter.replaceOpWithNewOp<smt::EqOp>(op, adaptor.getLhs(),
66 if (adaptor.getPredicate() == ICmpPredicate::ne) {
67 rewriter.replaceOpWithNewOp<smt::DistinctOp>(op, adaptor.getLhs(),
72 smt::BVCmpPredicate pred;
73 switch (adaptor.getPredicate()) {
74 case ICmpPredicate::sge:
75 pred = smt::BVCmpPredicate::sge;
77 case ICmpPredicate::sgt:
78 pred = smt::BVCmpPredicate::sgt;
80 case ICmpPredicate::sle:
81 pred = smt::BVCmpPredicate::sle;
83 case ICmpPredicate::slt:
84 pred = smt::BVCmpPredicate::slt;
86 case ICmpPredicate::uge:
87 pred = smt::BVCmpPredicate::uge;
89 case ICmpPredicate::ugt:
90 pred = smt::BVCmpPredicate::ugt;
92 case ICmpPredicate::ule:
93 pred = smt::BVCmpPredicate::ule;
95 case ICmpPredicate::ult:
96 pred = smt::BVCmpPredicate::ult;
99 llvm_unreachable(
"all cases handled above");
102 rewriter.replaceOpWithNewOp<smt::BVCmpOp>(op, pred, adaptor.getLhs(),
113 matchAndRewrite(
ExtractOp op, OpAdaptor adaptor,
114 ConversionPatternRewriter &rewriter)
const override {
116 rewriter.replaceOpWithNewOp<smt::ExtractOp>(
117 op, typeConverter->convertType(op.getResult().getType()),
118 adaptor.getLowBitAttr(), adaptor.getInput());
128 matchAndRewrite(
MuxOp op, OpAdaptor adaptor,
129 ConversionPatternRewriter &rewriter)
const override {
130 Value condition = typeConverter->materializeTargetConversion(
131 rewriter, op.getLoc(), smt::BoolType::get(getContext()),
133 rewriter.replaceOpWithNewOp<smt::IteOp>(
134 op, condition, adaptor.getTrueValue(), adaptor.getFalseValue());
144 matchAndRewrite(
SubOp op, OpAdaptor adaptor,
145 ConversionPatternRewriter &rewriter)
const override {
146 Value negRhs = rewriter.create<smt::BVNegOp>(op.getLoc(), adaptor.getRhs());
147 rewriter.replaceOpWithNewOp<smt::BVAddOp>(op, adaptor.getLhs(), negRhs);
157 matchAndRewrite(
ParityOp op, OpAdaptor adaptor,
158 ConversionPatternRewriter &rewriter)
const override {
159 Location loc = op.getLoc();
161 cast<smt::BitVectorType>(adaptor.getInput().getType()).getWidth();
165 Type oneBitTy = smt::BitVectorType::get(getContext(), 1);
167 rewriter.create<smt::ExtractOp>(loc, oneBitTy, 0, adaptor.getInput());
168 for (
unsigned i = 1; i < bitwidth; ++i) {
170 rewriter.create<smt::ExtractOp>(loc, oneBitTy, i, adaptor.getInput());
171 runner = rewriter.create<smt::BVXOrOp>(loc, runner, ext);
174 rewriter.replaceOp(op, runner);
180template <
typename SourceOp,
typename TargetOp>
183 using OpAdaptor =
typename SourceOp::Adaptor;
186 matchAndRewrite(SourceOp op, OpAdaptor adaptor,
187 ConversionPatternRewriter &rewriter)
const override {
189 rewriter.replaceOpWithNewOp<TargetOp>(
192 op.getResult().getType()),
193 adaptor.getOperands());
200template <
typename SourceOp,
typename TargetOp>
203 using OpAdaptor =
typename SourceOp::Adaptor;
206 matchAndRewrite(SourceOp op, OpAdaptor adaptor,
207 ConversionPatternRewriter &rewriter)
const override {
208 Location loc = op.getLoc();
209 auto type = dyn_cast<smt::BitVectorType>(adaptor.getRhs().getType());
214 op.getResult().getType());
216 rewriter.create<smt::BVConstantOp>(loc, APInt(type.getWidth(), 0));
217 Value isZero = rewriter.create<smt::EqOp>(loc, adaptor.getRhs(), zero);
218 Value symbolicVal = rewriter.create<smt::DeclareFunOp>(loc, resultType);
220 rewriter.create<TargetOp>(loc, resultType, adaptor.getOperands());
221 rewriter.replaceOpWithNewOp<smt::IteOp>(op, isZero, symbolicVal, division);
228template <
typename SourceOp,
typename TargetOp>
231 using OpAdaptor =
typename SourceOp::Adaptor;
234 matchAndRewrite(SourceOp op, OpAdaptor adaptor,
235 ConversionPatternRewriter &rewriter)
const override {
237 ValueRange operands = adaptor.getOperands();
238 if (operands.size() < 2)
241 Value runner = operands[0];
242 for (Value operand : operands.drop_front())
243 runner = rewriter.create<TargetOp>(op.
getLoc(), runner, operand);
245 rewriter.replaceOp(op, runner);
257struct ConvertCombToSMTPass
258 :
public circt::impl::ConvertCombToSMTBase<ConvertCombToSMTPass> {
259 void runOnOperation()
override;
265 patterns.add<CombReplicateOpConversion, IcmpOpConversion, ExtractOpConversion,
266 SubOpConversion, MuxOpConversion, ParityOpConversion,
267 OneToOneOpConversion<ShlOp, smt::BVShlOp>,
268 OneToOneOpConversion<ShrUOp, smt::BVLShrOp>,
269 OneToOneOpConversion<ShrSOp, smt::BVAShrOp>,
270 DivisionOpConversion<DivSOp, smt::BVSDivOp>,
271 DivisionOpConversion<DivUOp, smt::BVUDivOp>,
272 DivisionOpConversion<ModSOp, smt::BVSRemOp>,
273 DivisionOpConversion<ModUOp, smt::BVURemOp>,
274 VariadicToBinaryOpConversion<ConcatOp, smt::ConcatOp>,
275 VariadicToBinaryOpConversion<AddOp, smt::BVAddOp>,
276 VariadicToBinaryOpConversion<MulOp, smt::BVMulOp>,
277 VariadicToBinaryOpConversion<AndOp, smt::BVAndOp>,
278 VariadicToBinaryOpConversion<OrOp, smt::BVOrOp>,
279 VariadicToBinaryOpConversion<XorOp, smt::BVXOrOp>>(
286void ConvertCombToSMTPass::runOnOperation() {
287 ConversionTarget target(getContext());
288 target.addIllegalDialect<hw::HWDialect>();
289 target.addIllegalOp<seq::FromClockOp>();
290 target.addIllegalOp<seq::ToClockOp>();
291 target.addIllegalDialect<comb::CombDialect>();
292 target.addLegalDialect<smt::SMTDialect>();
293 target.addLegalDialect<mlir::func::FuncDialect>();
295 RewritePatternSet
patterns(&getContext());
296 TypeConverter converter;
304 if (failed(mlir::applyPartialConversion(getOperation(), target,
306 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.