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//===- RuntimeOpVerification.cpp - Op Verification ------------------------===//
//
// 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/MemRef/Transforms/RuntimeOpVerification.h"
#include "mlir/Dialect/Arith/IR/Arith.h"
#include "mlir/Dialect/ControlFlow/IR/ControlFlow.h"
#include "mlir/Dialect/ControlFlow/IR/ControlFlowOps.h"
#include "mlir/Dialect/MemRef/IR/MemRef.h"
#include "mlir/Interfaces/RuntimeVerifiableOpInterface.h"
using namespace mlir;
/// Generate an error message string for the given op and the specified error.
static std::string generateErrorMessage(Operation *op, const std::string &msg) {
std::string buffer;
llvm::raw_string_ostream stream(buffer);
OpPrintingFlags flags;
stream << "ERROR: Runtime op verification failed\n";
op->print(stream, flags);
stream << "\n^ " << msg;
stream << "\nLocation: ";
op->getLoc().print(stream);
return stream.str();
}
namespace mlir {
namespace memref {
namespace {
struct CastOpInterface
: public RuntimeVerifiableOpInterface::ExternalModel<CastOpInterface,
CastOp> {
void generateRuntimeVerification(Operation *op, OpBuilder &builder,
Location loc) const {
auto castOp = cast<CastOp>(op);
auto srcType = cast<BaseMemRefType>(castOp.getSource().getType());
// Nothing to check if the result is an unranked memref.
auto resultType = dyn_cast<MemRefType>(castOp.getType());
if (!resultType)
return;
if (isa<UnrankedMemRefType>(srcType)) {
// Check rank.
Value srcRank = builder.create<RankOp>(loc, castOp.getSource());
Value resultRank =
builder.create<arith::ConstantIndexOp>(loc, resultType.getRank());
Value isSameRank = builder.create<arith::CmpIOp>(
loc, arith::CmpIPredicate::eq, srcRank, resultRank);
builder.create<cf::AssertOp>(loc, isSameRank,
generateErrorMessage(op, "rank mismatch"));
}
// Get source offset and strides. We do not have an op to get offsets and
// strides from unranked memrefs, so cast the source to a type with fully
// dynamic layout, from which we can then extract the offset and strides.
// (Rank was already verified.)
int64_t dynamicOffset = ShapedType::kDynamic;
SmallVector<int64_t> dynamicShape(resultType.getRank(),
ShapedType::kDynamic);
auto stridedLayout = StridedLayoutAttr::get(builder.getContext(),
dynamicOffset, dynamicShape);
auto dynStridesType =
MemRefType::get(dynamicShape, resultType.getElementType(),
stridedLayout, resultType.getMemorySpace());
Value helperCast =
builder.create<CastOp>(loc, dynStridesType, castOp.getSource());
auto metadataOp = builder.create<ExtractStridedMetadataOp>(loc, helperCast);
// Check dimension sizes.
for (const auto &it : llvm::enumerate(resultType.getShape())) {
// Static dim size -> static/dynamic dim size does not need verification.
if (auto rankedSrcType = dyn_cast<MemRefType>(srcType))
if (!rankedSrcType.isDynamicDim(it.index()))
continue;
// Static/dynamic dim size -> dynamic dim size does not need verification.
if (resultType.isDynamicDim(it.index()))
continue;
Value srcDimSz =
builder.create<DimOp>(loc, castOp.getSource(), it.index());
Value resultDimSz =
builder.create<arith::ConstantIndexOp>(loc, it.value());
Value isSameSz = builder.create<arith::CmpIOp>(
loc, arith::CmpIPredicate::eq, srcDimSz, resultDimSz);
builder.create<cf::AssertOp>(
loc, isSameSz,
generateErrorMessage(op, "size mismatch of dim " +
std::to_string(it.index())));
}
// Get result offset and strides.
int64_t resultOffset;
SmallVector<int64_t> resultStrides;
if (failed(getStridesAndOffset(resultType, resultStrides, resultOffset)))
return;
// Check offset.
if (resultOffset != ShapedType::kDynamic) {
// Static/dynamic offset -> dynamic offset does not need verification.
Value srcOffset = metadataOp.getResult(1);
Value resultOffsetVal =
builder.create<arith::ConstantIndexOp>(loc, resultOffset);
Value isSameOffset = builder.create<arith::CmpIOp>(
loc, arith::CmpIPredicate::eq, srcOffset, resultOffsetVal);
builder.create<cf::AssertOp>(loc, isSameOffset,
generateErrorMessage(op, "offset mismatch"));
}
// Check strides.
for (const auto &it : llvm::enumerate(resultStrides)) {
// Static/dynamic stride -> dynamic stride does not need verification.
if (it.value() == ShapedType::kDynamic)
continue;
Value srcStride =
metadataOp.getResult(2 + resultType.getRank() + it.index());
Value resultStrideVal =
builder.create<arith::ConstantIndexOp>(loc, it.value());
Value isSameStride = builder.create<arith::CmpIOp>(
loc, arith::CmpIPredicate::eq, srcStride, resultStrideVal);
builder.create<cf::AssertOp>(
loc, isSameStride,
generateErrorMessage(op, "stride mismatch of dim " +
std::to_string(it.index())));
}
}
};
struct ExpandShapeOpInterface
: public RuntimeVerifiableOpInterface::ExternalModel<ExpandShapeOpInterface,
ExpandShapeOp> {
void generateRuntimeVerification(Operation *op, OpBuilder &builder,
Location loc) const {
auto expandShapeOp = cast<ExpandShapeOp>(op);
// Verify that the expanded dim sizes are a product of the collapsed dim
// size.
for (const auto &it :
llvm::enumerate(expandShapeOp.getReassociationIndices())) {
Value srcDimSz =
builder.create<DimOp>(loc, expandShapeOp.getSrc(), it.index());
int64_t groupSz = 1;
bool foundDynamicDim = false;
for (int64_t resultDim : it.value()) {
if (expandShapeOp.getResultType().isDynamicDim(resultDim)) {
// Keep this assert here in case the op is extended in the future.
assert(!foundDynamicDim &&
"more than one dynamic dim found in reassoc group");
(void)foundDynamicDim;
foundDynamicDim = true;
continue;
}
groupSz *= expandShapeOp.getResultType().getDimSize(resultDim);
}
Value staticResultDimSz =
builder.create<arith::ConstantIndexOp>(loc, groupSz);
// staticResultDimSz must divide srcDimSz evenly.
Value mod =
builder.create<arith::RemSIOp>(loc, srcDimSz, staticResultDimSz);
Value isModZero = builder.create<arith::CmpIOp>(
loc, arith::CmpIPredicate::eq, mod,
builder.create<arith::ConstantIndexOp>(loc, 0));
builder.create<cf::AssertOp>(
loc, isModZero,
generateErrorMessage(op, "static result dims in reassoc group do not "
"divide src dim evenly"));
}
}
};
} // namespace
} // namespace memref
} // namespace mlir
void mlir::memref::registerRuntimeVerifiableOpInterfaceExternalModels(
DialectRegistry ®istry) {
registry.addExtension(+[](MLIRContext *ctx, memref::MemRefDialect *dialect) {
CastOp::attachInterface<CastOpInterface>(*ctx);
ExpandShapeOp::attachInterface<ExpandShapeOpInterface>(*ctx);
// Load additional dialects of which ops may get created.
ctx->loadDialect<arith::ArithDialect, cf::ControlFlowDialect>();
});
}
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