MLIR  17.0.0git
ConvertFromLLVMIR.cpp
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1 //===- ConvertFromLLVMIR.cpp - MLIR to LLVM IR conversion -----------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the function that registers the translation between
10 // LLVM IR and the MLIR LLVM dialect.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "mlir/Dialect/DLTI/DLTI.h"
15 #include "mlir/IR/BuiltinOps.h"
19 #include "llvm/IR/Module.h"
20 #include "llvm/IRReader/IRReader.h"
21 #include "llvm/Support/SourceMgr.h"
22 
23 using namespace mlir;
24 
25 namespace mlir {
27  TranslateToMLIRRegistration registration(
28  "import-llvm", "translate llvmir to mlir",
29  [](llvm::SourceMgr &sourceMgr,
31  llvm::SMDiagnostic err;
32  llvm::LLVMContext llvmContext;
33  std::unique_ptr<llvm::Module> llvmModule =
34  llvm::parseIR(*sourceMgr.getMemoryBuffer(sourceMgr.getMainFileID()),
35  err, llvmContext);
36  if (!llvmModule) {
37  std::string errStr;
38  llvm::raw_string_ostream errStream(errStr);
39  err.print(/*ProgName=*/"", errStream);
40  emitError(UnknownLoc::get(context)) << errStream.str();
41  return {};
42  }
43  return translateLLVMIRToModule(std::move(llvmModule), context);
44  },
45  [](DialectRegistry &registry) {
46  // Register the DLTI dialect used to express the data layout
47  // specification of the imported module.
48  registry.insert<DLTIDialect>();
49  // Register all dialects that implement the LLVMImportDialectInterface
50  // including the LLVM dialect.
52  });
53 }
54 } // namespace mlir
The DialectRegistry maps a dialect namespace to a constructor for the matching dialect.
MLIRContext is the top-level object for a collection of MLIR operations.
Definition: MLIRContext.h:56
This class acts as an owning reference to an op, and will automatically destroy the held op on destru...
Definition: OwningOpRef.h:28
Include the generated interface declarations.
InFlightDiagnostic emitError(Location loc)
Utility method to emit an error message using this location.
static void registerAllFromLLVMIRTranslations(DialectRegistry &registry)
Registers all dialects that can be translated from LLVM IR and the corresponding translation interfac...
Definition: All.h:48
void registerFromLLVMIRTranslation()
OwningOpRef< ModuleOp > translateLLVMIRToModule(std::unique_ptr< llvm::Module > llvmModule, MLIRContext *context)
Translates the LLVM module into an MLIR module living in the given context.
Use Translate[ToMLIR|FromMLIR]Registration as an initializer that registers a function and associates...
Definition: Translation.h:110