e0dd5f98c4
This was an arbitrary restriction caused by the way that modules were printed. Now that that has been fixed, this restriction can be removed. PiperOrigin-RevId: 257240329
116 lines
4.2 KiB
C++
116 lines
4.2 KiB
C++
//===- Module.cpp - MLIR Module Operation ---------------------------------===//
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//
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// Copyright 2019 The MLIR Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// =============================================================================
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#include "mlir/IR/Module.h"
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#include "mlir/IR/Builders.h"
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#include "mlir/IR/OpImplementation.h"
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using namespace mlir;
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//===----------------------------------------------------------------------===//
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// Module Operation.
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//===----------------------------------------------------------------------===//
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// Insert `module_terminator` at the end of the region's only block if it does
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// not have a terminator already. If the region is empty, insert a new block
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// first.
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static void ensureModuleTerminator(Region ®ion, Builder &builder,
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Location loc) {
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impl::ensureRegionTerminator<ModuleTerminatorOp>(region, builder, loc);
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}
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void ModuleOp::build(Builder *builder, OperationState *result) {
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ensureModuleTerminator(*result->addRegion(), *builder, result->location);
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}
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/// Construct a module from the given context.
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ModuleOp ModuleOp::create(MLIRContext *context) {
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OperationState state(UnknownLoc::get(context), "module");
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Builder builder(context);
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ModuleOp::build(&builder, &state);
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return llvm::cast<ModuleOp>(Operation::create(state));
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}
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ParseResult ModuleOp::parse(OpAsmParser *parser, OperationState *result) {
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// If module attributes are present, parse them.
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if (succeeded(parser->parseOptionalKeyword("attributes")))
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if (parser->parseOptionalAttributeDict(result->attributes))
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return failure();
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// Parse the module body.
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auto *body = result->addRegion();
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if (parser->parseRegion(*body, llvm::None, llvm::None))
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return failure();
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// Ensure that this module has a valid terminator.
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ensureModuleTerminator(*body, parser->getBuilder(), result->location);
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return success();
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}
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void ModuleOp::print(OpAsmPrinter *p) {
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*p << "module";
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// Print the module attributes.
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auto attrs = getAttrs();
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if (!attrs.empty()) {
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*p << " attributes";
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p->printOptionalAttrDict(attrs, {});
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}
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// Print the region.
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p->printRegion(getOperation()->getRegion(0), /*printEntryBlockArgs=*/false,
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/*printBlockTerminators=*/false);
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}
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LogicalResult ModuleOp::verify() {
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auto &bodyRegion = getOperation()->getRegion(0);
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// The body must contain a single basic block.
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if (bodyRegion.empty() || std::next(bodyRegion.begin()) != bodyRegion.end())
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return emitOpError("expected body region to have a single block");
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// Check that the body has no block arguments.
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auto *body = &bodyRegion.front();
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if (body->getNumArguments() != 0)
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return emitOpError("expected body to have no arguments");
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if (body->empty() || !isa<ModuleTerminatorOp>(body->back())) {
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return emitOpError("expects region to end with '" +
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ModuleTerminatorOp::getOperationName() + "'")
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.attachNote()
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<< "in custom textual format, the absence of terminator implies '"
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<< ModuleTerminatorOp::getOperationName() << "'";
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}
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return success();
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}
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/// Return body of this module.
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Region &ModuleOp::getBodyRegion() { return getOperation()->getRegion(0); }
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Block *ModuleOp::getBody() { return &getBodyRegion().front(); }
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//===----------------------------------------------------------------------===//
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// Module Terminator Operation.
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//===----------------------------------------------------------------------===//
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LogicalResult ModuleTerminatorOp::verify() {
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if (!isa_and_nonnull<ModuleOp>(getOperation()->getParentOp()))
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return emitOpError() << "is expected to terminate a '"
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<< ModuleOp::getOperationName() << "' operation";
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return success();
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}
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