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//===- DILineTableFromLocations.cpp - -------------------------------------===//
//
// 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 "mlir/Dialect/LLVMIR/Transforms/Passes.h"
#include "mlir/Dialect/LLVMIR/LLVMDialect.h"
#include "mlir/Pass/Pass.h"
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Path.h"
namespace mlir {
namespace LLVM {
#define GEN_PASS_DEF_DISCOPEFORLLVMFUNCOP
#include "mlir/Dialect/LLVMIR/Transforms/Passes.h.inc"
} // namespace LLVM
} // namespace mlir
using namespace mlir;
/// Attempt to extract a filename for the given loc.
static FileLineColLoc extractFileLoc(Location loc) {
if (auto fileLoc = dyn_cast<FileLineColLoc>(loc))
return fileLoc;
if (auto nameLoc = dyn_cast<NameLoc>(loc))
return extractFileLoc(nameLoc.getChildLoc());
if (auto opaqueLoc = dyn_cast<OpaqueLoc>(loc))
return extractFileLoc(opaqueLoc.getFallbackLocation());
return FileLineColLoc();
}
namespace {
/// Add a debug info scope to LLVMFuncOp that are missing it.
struct DIScopeForLLVMFuncOp
: public LLVM::impl::DIScopeForLLVMFuncOpBase<DIScopeForLLVMFuncOp> {
void runOnOperation() override {
LLVM::LLVMFuncOp llvmFunc = getOperation();
Location loc = llvmFunc.getLoc();
if (loc->findInstanceOf<mlir::FusedLocWith<LLVM::DISubprogramAttr>>())
return;
MLIRContext *context = &getContext();
// To find a DICompileUnitAttr attached to a parent (the module for
// example), otherwise create a default one.
LLVM::DICompileUnitAttr compileUnitAttr;
if (ModuleOp module = llvmFunc->getParentOfType<ModuleOp>()) {
auto fusedCompileUnitAttr =
module->getLoc()
->findInstanceOf<mlir::FusedLocWith<LLVM::DICompileUnitAttr>>();
if (fusedCompileUnitAttr)
compileUnitAttr = fusedCompileUnitAttr.getMetadata();
}
// Filename, line and colmun to associate to the function.
LLVM::DIFileAttr fileAttr;
int64_t line = 1, col = 1;
FileLineColLoc fileLoc = extractFileLoc(loc);
if (!fileLoc && compileUnitAttr) {
fileAttr = compileUnitAttr.getFile();
} else if (!fileLoc) {
fileAttr = LLVM::DIFileAttr::get(context, "<unknown>", "");
} else {
line = fileLoc.getLine();
col = fileLoc.getColumn();
StringRef inputFilePath = fileLoc.getFilename().getValue();
fileAttr = LLVM::DIFileAttr::get(
context, llvm::sys::path::filename(inputFilePath),
llvm::sys::path::parent_path(inputFilePath));
}
if (!compileUnitAttr) {
compileUnitAttr = LLVM::DICompileUnitAttr::get(
context, llvm::dwarf::DW_LANG_C, fileAttr,
StringAttr::get(context, "MLIR"), /*isOptimized=*/true,
LLVM::DIEmissionKind::LineTablesOnly);
}
auto subroutineTypeAttr =
LLVM::DISubroutineTypeAttr::get(context, llvm::dwarf::DW_CC_normal, {});
StringAttr funcNameAttr = llvmFunc.getNameAttr();
auto subprogramAttr =
LLVM::DISubprogramAttr::get(context, compileUnitAttr, fileAttr,
funcNameAttr, funcNameAttr, fileAttr,
/*line=*/line,
/*scopeline=*/col,
LLVM::DISubprogramFlags::Definition |
LLVM::DISubprogramFlags::Optimized,
subroutineTypeAttr);
llvmFunc->setLoc(FusedLoc::get(context, {loc}, subprogramAttr));
}
};
} // end anonymous namespace
std::unique_ptr<Pass> mlir::LLVM::createDIScopeForLLVMFuncOpPass() {
return std::make_unique<DIScopeForLLVMFuncOp>();
}
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