9aa3dca80f
Summary: This patch adds semantic checking for the OpenACC 3.0 clauses validity. Reviewers: sscalpone, tskeith, klausler, ichoyjx, DavidTruby, jdoerfert Reviewed By: tskeith, klausler Subscribers: mgorny, llvm-commits Tags: #llvm, #flang Differential Revision: https://reviews.llvm.org/D83807
85 lines
3.0 KiB
C++
85 lines
3.0 KiB
C++
//===-- lib/Semantics/canonicalize-acc.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 "canonicalize-acc.h"
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#include "flang/Parser/parse-tree-visitor.h"
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#include "flang/Semantics/tools.h"
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// After Loop Canonicalization, rewrite OpenACC parse tree to make OpenACC
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// Constructs more structured which provide explicit scopes for later
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// structural checks and semantic analysis.
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// 1. move structured DoConstruct into
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// OpenACCLoopConstruct. Compilation will not proceed in case of errors
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// after this pass.
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namespace Fortran::semantics {
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using namespace parser::literals;
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class CanonicalizationOfAcc {
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public:
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template <typename T> bool Pre(T &) { return true; }
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template <typename T> void Post(T &) {}
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CanonicalizationOfAcc(parser::Messages &messages) : messages_{messages} {}
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void Post(parser::Block &block) {
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for (auto it{block.begin()}; it != block.end(); ++it) {
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if (auto *accLoop{parser::Unwrap<parser::OpenACCLoopConstruct>(*it)}) {
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RewriteOpenACCLoopConstruct(*accLoop, block, it);
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}
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} // Block list
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}
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private:
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void RewriteOpenACCLoopConstruct(parser::OpenACCLoopConstruct &x,
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parser::Block &block, parser::Block::iterator it) {
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// Check the sequence of DoConstruct in the same iteration
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//
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// Original:
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// ExecutableConstruct -> OpenACCConstruct -> OpenACCLoopConstruct
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// ACCBeginLoopDirective
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// ExecutableConstruct -> DoConstruct
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//
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// After rewriting:
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// ExecutableConstruct -> OpenACCConstruct -> OpenACCLoopConstruct
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// AccBeginLoopDirective
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// DoConstruct
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parser::Block::iterator nextIt;
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auto &beginDir{std::get<parser::AccBeginLoopDirective>(x.t)};
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auto &dir{std::get<parser::AccLoopDirective>(beginDir.t)};
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nextIt = it;
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if (++nextIt != block.end()) {
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if (auto *doCons{parser::Unwrap<parser::DoConstruct>(*nextIt)}) {
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if (doCons->GetLoopControl()) {
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// move DoConstruct
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std::get<std::optional<parser::DoConstruct>>(x.t) =
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std::move(*doCons);
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nextIt = block.erase(nextIt);
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} else {
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messages_.Say(dir.source,
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"DO loop after the %s directive must have loop control"_err_en_US,
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parser::ToUpperCaseLetters(dir.source.ToString()));
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}
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return; // found do-loop
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}
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}
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messages_.Say(dir.source,
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"A DO loop must follow the %s directive"_err_en_US,
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parser::ToUpperCaseLetters(dir.source.ToString()));
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}
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parser::Messages &messages_;
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};
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bool CanonicalizeAcc(parser::Messages &messages, parser::Program &program) {
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CanonicalizationOfAcc acc{messages};
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Walk(program, acc);
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return !messages.AnyFatalError();
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}
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} // namespace Fortran::semantics
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