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//===- ExternalNameConversion.cpp -- convert name with external convention ===//
//
// 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 "flang/Optimizer/Dialect/FIRDialect.h"
#include "flang/Optimizer/Dialect/FIROps.h"
#include "flang/Optimizer/Support/InternalNames.h"
#include "flang/Optimizer/Transforms/Passes.h"
#include "mlir/Dialect/LLVMIR/LLVMDialect.h"
#include "mlir/Dialect/OpenACC/OpenACC.h"
#include "mlir/Dialect/OpenMP/OpenMPDialect.h"
#include "mlir/IR/SymbolTable.h"
#include "mlir/Pass/Pass.h"
#include "mlir/Transforms/DialectConversion.h"
namespace fir {
#define GEN_PASS_DEF_EXTERNALNAMECONVERSION
#include "flang/Optimizer/Transforms/Passes.h.inc"
} // namespace fir
using namespace mlir;
//===----------------------------------------------------------------------===//
// Helper functions
//===----------------------------------------------------------------------===//
/// Mangle the name with gfortran convention.
std::string
mangleExternalName(const std::pair<fir::NameUniquer::NameKind,
fir::NameUniquer::DeconstructedName>
result,
bool appendUnderscore) {
if (result.first == fir::NameUniquer::NameKind::COMMON &&
result.second.name.empty())
return "__BLNK__";
if (appendUnderscore)
return result.second.name + "_";
return result.second.name;
}
/// Update the early outlining parent name
void updateEarlyOutliningParentName(mlir::func::FuncOp funcOp,
bool appendUnderscore) {
if (auto earlyOutlineOp = llvm::dyn_cast<mlir::omp::EarlyOutliningInterface>(
funcOp.getOperation())) {
auto oldName = earlyOutlineOp.getParentName();
if (oldName != "") {
auto dName = fir::NameUniquer::deconstruct(oldName);
std::string newName = mangleExternalName(dName, appendUnderscore);
earlyOutlineOp.setParentName(newName);
}
}
}
//===----------------------------------------------------------------------===//
// Rewrite patterns
//===----------------------------------------------------------------------===//
namespace {
struct MangleNameOnFuncOp : public mlir::OpRewritePattern<mlir::func::FuncOp> {
public:
using OpRewritePattern::OpRewritePattern;
MangleNameOnFuncOp(mlir::MLIRContext *ctx, bool appendUnderscore)
: mlir::OpRewritePattern<mlir::func::FuncOp>(ctx),
appendUnderscore(appendUnderscore) {}
mlir::LogicalResult
matchAndRewrite(mlir::func::FuncOp op,
mlir::PatternRewriter &rewriter) const override {
mlir::LogicalResult ret = success();
rewriter.startRootUpdate(op);
auto result = fir::NameUniquer::deconstruct(op.getSymName());
if (fir::NameUniquer::isExternalFacingUniquedName(result)) {
auto newSymbol =
rewriter.getStringAttr(mangleExternalName(result, appendUnderscore));
// Try to update all SymbolRef's in the module that match the current op
if (mlir::ModuleOp mod = op->getParentOfType<mlir::ModuleOp>())
ret = op.replaceAllSymbolUses(newSymbol, mod);
op.setSymNameAttr(newSymbol);
mlir::SymbolTable::setSymbolName(op, newSymbol);
}
updateEarlyOutliningParentName(op, appendUnderscore);
rewriter.finalizeRootUpdate(op);
return ret;
}
private:
bool appendUnderscore;
};
struct MangleNameForCommonBlock : public mlir::OpRewritePattern<fir::GlobalOp> {
public:
using OpRewritePattern::OpRewritePattern;
MangleNameForCommonBlock(mlir::MLIRContext *ctx, bool appendUnderscore)
: mlir::OpRewritePattern<fir::GlobalOp>(ctx),
appendUnderscore(appendUnderscore) {}
mlir::LogicalResult
matchAndRewrite(fir::GlobalOp op,
mlir::PatternRewriter &rewriter) const override {
rewriter.startRootUpdate(op);
auto result = fir::NameUniquer::deconstruct(
op.getSymref().getRootReference().getValue());
if (fir::NameUniquer::isExternalFacingUniquedName(result)) {
auto newName = mangleExternalName(result, appendUnderscore);
op.setSymrefAttr(mlir::SymbolRefAttr::get(op.getContext(), newName));
SymbolTable::setSymbolName(op, newName);
}
rewriter.finalizeRootUpdate(op);
return success();
}
private:
bool appendUnderscore;
};
struct MangleNameOnAddrOfOp : public mlir::OpRewritePattern<fir::AddrOfOp> {
public:
using OpRewritePattern::OpRewritePattern;
MangleNameOnAddrOfOp(mlir::MLIRContext *ctx, bool appendUnderscore)
: mlir::OpRewritePattern<fir::AddrOfOp>(ctx),
appendUnderscore(appendUnderscore) {}
mlir::LogicalResult
matchAndRewrite(fir::AddrOfOp op,
mlir::PatternRewriter &rewriter) const override {
auto result = fir::NameUniquer::deconstruct(
op.getSymbol().getRootReference().getValue());
if (fir::NameUniquer::isExternalFacingUniquedName(result)) {
auto newName = SymbolRefAttr::get(
op.getContext(), mangleExternalName(result, appendUnderscore));
rewriter.replaceOpWithNewOp<fir::AddrOfOp>(op, op.getResTy().getType(),
newName);
}
return success();
}
private:
bool appendUnderscore;
};
class ExternalNameConversionPass
: public fir::impl::ExternalNameConversionBase<ExternalNameConversionPass> {
public:
ExternalNameConversionPass(bool appendUnderscoring)
: appendUnderscores(appendUnderscoring) {}
ExternalNameConversionPass() { usePassOpt = true; }
mlir::ModuleOp getModule() { return getOperation(); }
void runOnOperation() override;
private:
bool appendUnderscores;
bool usePassOpt;
};
} // namespace
void ExternalNameConversionPass::runOnOperation() {
auto op = getOperation();
auto *context = &getContext();
appendUnderscores = (usePassOpt) ? appendUnderscoreOpt : appendUnderscores;
mlir::RewritePatternSet patterns(context);
patterns.insert<MangleNameOnFuncOp, MangleNameForCommonBlock,
MangleNameOnAddrOfOp>(context, appendUnderscores);
ConversionTarget target(*context);
target.addLegalDialect<fir::FIROpsDialect, LLVM::LLVMDialect,
acc::OpenACCDialect, omp::OpenMPDialect>();
target.addDynamicallyLegalOp<mlir::func::FuncOp>([](mlir::func::FuncOp op) {
return !fir::NameUniquer::needExternalNameMangling(op.getSymName());
});
target.addDynamicallyLegalOp<fir::GlobalOp>([](fir::GlobalOp op) {
return !fir::NameUniquer::needExternalNameMangling(
op.getSymref().getRootReference().getValue());
});
target.addDynamicallyLegalOp<fir::AddrOfOp>([](fir::AddrOfOp op) {
return !fir::NameUniquer::needExternalNameMangling(
op.getSymbol().getRootReference().getValue());
});
if (failed(applyPartialConversion(op, target, std::move(patterns))))
signalPassFailure();
}
std::unique_ptr<mlir::Pass> fir::createExternalNameConversionPass() {
return std::make_unique<ExternalNameConversionPass>();
}
std::unique_ptr<mlir::Pass>
fir::createExternalNameConversionPass(bool appendUnderscoring) {
return std::make_unique<ExternalNameConversionPass>(appendUnderscoring);
}
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