mirror of https://github.com/llvm/circt.git
76 lines
2.4 KiB
C++
76 lines
2.4 KiB
C++
//===- ClkResetInsertion.cpp - Clock & reset insertion pass -----*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Adds assignments from a components 'clk' and 'reset' port to every
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// component that contains an input 'clk' or 'reset' port.
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//
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//===----------------------------------------------------------------------===//
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#include "circt/Dialect/Calyx/CalyxOps.h"
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#include "circt/Dialect/Calyx/CalyxPasses.h"
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#include "circt/Support/LLVM.h"
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#include "mlir/IR/BuiltinTypes.h"
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#include "mlir/IR/OperationSupport.h"
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#include "mlir/Transforms/DialectConversion.h"
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#include "mlir/Transforms/GreedyPatternRewriteDriver.h"
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namespace circt {
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namespace calyx {
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#define GEN_PASS_DEF_CLKINSERTION
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#define GEN_PASS_DEF_RESETINSERTION
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#include "circt/Dialect/Calyx/CalyxPasses.h.inc"
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} // namespace calyx
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} // namespace circt
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using namespace circt;
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using namespace calyx;
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using namespace mlir;
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namespace {
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/// Iterates over the cells in 'comp' and connects any input port with attribute
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/// 'portID' to 'fromPort'.
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static void doPortPassthrough(ComponentOp comp, Value fromPort,
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StringRef portID) {
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MLIRContext *ctx = comp.getContext();
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OpBuilder builder(ctx);
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builder.setInsertionPointToStart(comp.getWiresOp().getBodyBlock());
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for (auto cell : comp.getOps<CellInterface>()) {
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for (auto port : cell.getInputPorts()) {
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if (!cell.portInfo(port).hasAttribute(portID))
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continue;
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builder.create<AssignOp>(cell.getLoc(), port, fromPort);
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}
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}
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}
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struct ClkInsertionPass
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: public circt::calyx::impl::ClkInsertionBase<ClkInsertionPass> {
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void runOnOperation() override {
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doPortPassthrough(getOperation(), getOperation().getClkPort(), "clk");
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}
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};
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struct ResetInsertionPass
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: public circt::calyx::impl::ResetInsertionBase<ResetInsertionPass> {
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void runOnOperation() override {
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doPortPassthrough(getOperation(), getOperation().getResetPort(), "reset");
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}
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};
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} // end anonymous namespace
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std::unique_ptr<mlir::Pass> circt::calyx::createClkInsertionPass() {
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return std::make_unique<ClkInsertionPass>();
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}
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std::unique_ptr<mlir::Pass> circt::calyx::createResetInsertionPass() {
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return std::make_unique<ResetInsertionPass>();
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}
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