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//===- TestSidEffects.cpp - Pass to test side effects ---------------------===//
//
// 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 "TestOps.h"
#include "mlir/Pass/Pass.h"
using namespace mlir;
namespace {
struct SideEffectsPass
: public PassWrapper<SideEffectsPass, OperationPass<ModuleOp>> {
MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(SideEffectsPass)
StringRef getArgument() const final { return "test-side-effects"; }
StringRef getDescription() const final {
return "Test side effects interfaces";
}
void runOnOperation() override {
auto module = getOperation();
// Walk operations detecting side effects.
SmallVector<MemoryEffects::EffectInstance, 8> effects;
module.walk([&](MemoryEffectOpInterface op) {
effects.clear();
op.getEffects(effects);
if (op->hasTrait<OpTrait::IsTerminator>()) {
return;
}
// Check to see if this operation has any memory effects.
if (effects.empty()) {
op.emitRemark() << "operation has no memory effects";
return;
}
for (MemoryEffects::EffectInstance instance : effects) {
auto diag = op.emitRemark() << "found an instance of ";
if (isa<MemoryEffects::Allocate>(instance.getEffect()))
diag << "'allocate'";
else if (isa<MemoryEffects::Free>(instance.getEffect()))
diag << "'free'";
else if (isa<MemoryEffects::Read>(instance.getEffect()))
diag << "'read'";
else if (isa<MemoryEffects::Write>(instance.getEffect()))
diag << "'write'";
if (instance.getValue()) {
if (auto *opOpd = instance.getEffectValue<OpOperand *>())
diag << " on op operand " << opOpd->getOperandNumber() << ",";
else if (auto opRes = instance.getEffectValue<OpResult>())
diag << " on op result " << opRes.getResultNumber() << ",";
else if (auto opBlk = instance.getEffectValue<BlockArgument>())
diag << " on block argument " << opBlk.getArgNumber() << ",";
} else if (SymbolRefAttr symbolRef = instance.getSymbolRef())
diag << " on a symbol '" << symbolRef << "',";
diag << " on resource '" << instance.getResource()->getName() << "'";
}
});
SmallVector<TestEffects::EffectInstance, 1> testEffects;
module.walk([&](TestEffectOpInterface op) {
testEffects.clear();
op.getEffects(testEffects);
if (testEffects.empty())
return;
for (const TestEffects::EffectInstance &instance : testEffects) {
op.emitRemark() << "found a parametric effect with "
<< instance.getParameters();
}
});
}
};
} // namespace
namespace mlir {
void registerSideEffectTestPasses() { PassRegistration<SideEffectsPass>(); }
} // namespace mlir
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