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//===- TestSCFWrapInZeroTripCheck.cpp -- Pass to test SCF zero-trip-check -===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file implements the passes to test wrap-in-zero-trip-check transforms on
// SCF loop ops.
//
//===----------------------------------------------------------------------===//
#include "mlir/Dialect/Func/IR/FuncOps.h"
#include "mlir/Dialect/SCF/IR/SCF.h"
#include "mlir/Dialect/SCF/Transforms/Patterns.h"
#include "mlir/Dialect/SCF/Transforms/Transforms.h"
#include "mlir/IR/PatternMatch.h"
#include "mlir/Pass/Pass.h"
#include "mlir/Transforms/GreedyPatternRewriteDriver.h"
using namespace mlir;
namespace {
struct TestWrapWhileLoopInZeroTripCheckPass
: public PassWrapper<TestWrapWhileLoopInZeroTripCheckPass,
OperationPass<func::FuncOp>> {
MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(
TestWrapWhileLoopInZeroTripCheckPass)
StringRef getArgument() const final {
return "test-wrap-scf-while-loop-in-zero-trip-check";
}
StringRef getDescription() const final {
return "test scf::wrapWhileLoopInZeroTripCheck";
}
TestWrapWhileLoopInZeroTripCheckPass() = default;
TestWrapWhileLoopInZeroTripCheckPass(
const TestWrapWhileLoopInZeroTripCheckPass &) {}
explicit TestWrapWhileLoopInZeroTripCheckPass(bool forceCreateCheckParam) {
forceCreateCheck = forceCreateCheckParam;
}
void runOnOperation() override {
func::FuncOp func = getOperation();
MLIRContext *context = &getContext();
IRRewriter rewriter(context);
if (forceCreateCheck) {
func.walk([&](scf::WhileOp op) {
FailureOr<scf::WhileOp> result =
scf::wrapWhileLoopInZeroTripCheck(op, rewriter, forceCreateCheck);
// Ignore not implemented failure in tests. The expected output should
// catch problems (e.g. transformation doesn't happen).
(void)result;
});
} else {
RewritePatternSet patterns(context);
scf::populateSCFRotateWhileLoopPatterns(patterns);
(void)applyPatternsGreedily(func, std::move(patterns));
}
}
Option<bool> forceCreateCheck{
*this, "force-create-check",
llvm::cl::desc("Force to create zero-trip-check."),
llvm::cl::init(false)};
};
} // namespace
namespace mlir {
namespace test {
void registerTestSCFWrapInZeroTripCheckPasses() {
PassRegistration<TestWrapWhileLoopInZeroTripCheckPass>();
}
} // namespace test
} // namespace mlir
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