da60b9e7dc
There are several observations regarding the copy-in/copy-out:
* Actual argument associated with INTENT(OUT) dummy argument that
requires finalization (7.5.6.3 p. 7) may be read by the finalization
function, so a copy-in is required.
* A temporary created for the copy-in/copy-out must be destroyed
without finalization after the call (or after the corresponding copy-out),
otherwise, memory leaks may occur.
* The copy-out assignment must not perform finalization for the LHS.
* The copy-out assignment from the temporary to the actual argument
may or may not need to initialize the LHS.
This change-set introduces new runtime methods: CopyOutAssign and
DestroyWithoutFinalization. They are called by the compiler generated
code to match the behavior described above.
Reviewed By: jeanPerier
Differential Revision: https://reviews.llvm.org/D151135
94 lines
4.5 KiB
C++
94 lines
4.5 KiB
C++
//===-- Derived.cpp -- derived type runtime API ---------------------------===//
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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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#include "flang/Optimizer/Builder/Runtime/Derived.h"
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#include "flang/Optimizer/Builder/FIRBuilder.h"
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#include "flang/Optimizer/Builder/Runtime/RTBuilder.h"
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#include "flang/Optimizer/Support/FatalError.h"
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#include "flang/Optimizer/Support/InternalNames.h"
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#include "flang/Runtime/derived-api.h"
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#include "flang/Runtime/pointer.h"
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using namespace Fortran::runtime;
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void fir::runtime::genDerivedTypeInitialize(fir::FirOpBuilder &builder,
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mlir::Location loc,
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mlir::Value box) {
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auto func = fir::runtime::getRuntimeFunc<mkRTKey(Initialize)>(loc, builder);
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auto fTy = func.getFunctionType();
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auto sourceFile = fir::factory::locationToFilename(builder, loc);
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auto sourceLine =
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fir::factory::locationToLineNo(builder, loc, fTy.getInput(2));
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auto args = fir::runtime::createArguments(builder, loc, fTy, box, sourceFile,
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sourceLine);
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builder.create<fir::CallOp>(loc, func, args);
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}
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void fir::runtime::genDerivedTypeDestroy(fir::FirOpBuilder &builder,
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mlir::Location loc, mlir::Value box) {
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auto func = fir::runtime::getRuntimeFunc<mkRTKey(Destroy)>(loc, builder);
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auto fTy = func.getFunctionType();
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auto args = fir::runtime::createArguments(builder, loc, fTy, box);
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builder.create<fir::CallOp>(loc, func, args);
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}
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void fir::runtime::genDerivedTypeDestroyWithoutFinalization(
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fir::FirOpBuilder &builder, mlir::Location loc, mlir::Value box) {
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auto func = fir::runtime::getRuntimeFunc<mkRTKey(DestroyWithoutFinalization)>(
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loc, builder);
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auto fTy = func.getFunctionType();
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auto args = fir::runtime::createArguments(builder, loc, fTy, box);
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builder.create<fir::CallOp>(loc, func, args);
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}
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void fir::runtime::genNullifyDerivedType(fir::FirOpBuilder &builder,
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mlir::Location loc, mlir::Value box,
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fir::RecordType derivedType,
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unsigned rank) {
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std::string typeDescName =
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fir::NameUniquer::getTypeDescriptorName(derivedType.getName());
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fir::GlobalOp typeDescGlobal = builder.getNamedGlobal(typeDescName);
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if (!typeDescGlobal)
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fir::emitFatalError(loc, "no type descriptor found for NULLIFY");
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auto typeDescAddr = builder.create<fir::AddrOfOp>(
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loc, fir::ReferenceType::get(typeDescGlobal.getType()),
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typeDescGlobal.getSymbol());
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mlir::func::FuncOp callee =
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fir::runtime::getRuntimeFunc<mkRTKey(PointerNullifyDerived)>(loc,
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builder);
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llvm::ArrayRef<mlir::Type> inputTypes = callee.getFunctionType().getInputs();
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llvm::SmallVector<mlir::Value> args;
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args.push_back(builder.createConvert(loc, inputTypes[0], box));
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args.push_back(builder.createConvert(loc, inputTypes[1], typeDescAddr));
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mlir::Value rankCst = builder.createIntegerConstant(loc, inputTypes[2], rank);
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mlir::Value c0 = builder.createIntegerConstant(loc, inputTypes[3], 0);
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args.push_back(rankCst);
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args.push_back(c0);
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builder.create<fir::CallOp>(loc, callee, args);
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}
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mlir::Value fir::runtime::genSameTypeAs(fir::FirOpBuilder &builder,
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mlir::Location loc, mlir::Value a,
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mlir::Value b) {
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mlir::func::FuncOp sameTypeAsFunc =
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fir::runtime::getRuntimeFunc<mkRTKey(SameTypeAs)>(loc, builder);
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auto fTy = sameTypeAsFunc.getFunctionType();
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auto args = fir::runtime::createArguments(builder, loc, fTy, a, b);
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return builder.create<fir::CallOp>(loc, sameTypeAsFunc, args).getResult(0);
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}
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mlir::Value fir::runtime::genExtendsTypeOf(fir::FirOpBuilder &builder,
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mlir::Location loc, mlir::Value a,
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mlir::Value mold) {
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mlir::func::FuncOp extendsTypeOfFunc =
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fir::runtime::getRuntimeFunc<mkRTKey(ExtendsTypeOf)>(loc, builder);
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auto fTy = extendsTypeOfFunc.getFunctionType();
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auto args = fir::runtime::createArguments(builder, loc, fTy, a, mold);
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return builder.create<fir::CallOp>(loc, extendsTypeOfFunc, args).getResult(0);
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}
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