1c16b0db9d
In TRANSFER runtime the result was an array only if the MOLD was an array. This is not in line with TRANSFER definition in 16.9.193 that rules that it must also be an array if MOLD is scalar and SIZE if provided. Differential Revision: https://reviews.llvm.org/D114943
78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
//===-- runtime/misc-intrinsic.cpp ----------------------------------------===//
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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/Runtime/misc-intrinsic.h"
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#include "terminator.h"
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#include "flang/Runtime/descriptor.h"
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#include <algorithm>
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#include <cstring>
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#include <optional>
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namespace Fortran::runtime {
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static void TransferImpl(Descriptor &result, const Descriptor &source,
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const Descriptor &mold, const char *sourceFile, int line,
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std::optional<std::int64_t> resultExtent) {
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int rank{resultExtent.has_value() ? 1 : 0};
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std::size_t elementBytes{mold.ElementBytes()};
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result.Establish(mold.type(), elementBytes, nullptr, rank, nullptr,
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CFI_attribute_allocatable, mold.Addendum() != nullptr);
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if (resultExtent) {
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result.GetDimension(0).SetBounds(1, *resultExtent);
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}
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if (const DescriptorAddendum * addendum{mold.Addendum()}) {
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*result.Addendum() = *addendum;
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}
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if (int stat{result.Allocate()}) {
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Terminator{sourceFile, line}.Crash(
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"TRANSFER: could not allocate memory for result; STAT=%d", stat);
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}
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char *to{result.OffsetElement<char>()};
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std::size_t resultBytes{result.Elements() * result.ElementBytes()};
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const std::size_t sourceElementBytes{source.ElementBytes()};
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std::size_t sourceElements{source.Elements()};
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SubscriptValue sourceAt[maxRank];
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source.GetLowerBounds(sourceAt);
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while (resultBytes > 0 && sourceElements > 0) {
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std::size_t toMove{std::min(resultBytes, sourceElementBytes)};
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std::memcpy(to, source.Element<char>(sourceAt), toMove);
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to += toMove;
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resultBytes -= toMove;
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--sourceElements;
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source.IncrementSubscripts(sourceAt);
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}
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if (resultBytes > 0) {
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std::memset(to, 0, resultBytes);
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}
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}
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extern "C" {
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void RTNAME(Transfer)(Descriptor &result, const Descriptor &source,
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const Descriptor &mold, const char *sourceFile, int line) {
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if (mold.rank() > 0) {
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std::size_t moldElementBytes{mold.ElementBytes()};
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std::size_t elements{
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(source.Elements() * source.ElementBytes() + moldElementBytes - 1) /
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moldElementBytes};
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return TransferImpl(result, source, mold, sourceFile, line,
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static_cast<std::int64_t>(elements));
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} else {
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return TransferImpl(result, source, mold, sourceFile, line, {});
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}
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}
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void RTNAME(TransferSize)(Descriptor &result, const Descriptor &source,
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const Descriptor &mold, const char *sourceFile, int line,
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std::int64_t size) {
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return TransferImpl(result, source, mold, sourceFile, line, size);
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}
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} // extern "C"
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} // namespace Fortran::runtime
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