b815a3942a
Move non-common files from FortranCommon to FortranSupport (analogous to
LLVMSupport) such that
* declarations and definitions that are only used by the Flang compiler,
but not by the runtime, are moved to FortranSupport
* declarations and definitions that are used by both ("common"), the
compiler and the runtime, remain in FortranCommon
* generic STL-like/ADT/utility classes and algorithms remain in
FortranCommon
This allows a for cleaner separation between compiler and runtime
components, which are compiled differently. For instance, runtime
sources must not use STL's `<optional>` which causes problems with CUDA
support. Instead, the surrogate header `flang/Common/optional.h` must be
used. This PR fixes this for `fast-int-sel.h`.
Declarations in include/Runtime are also used by both, but are
header-only. `ISO_Fortran_binding_wrapper.h`, a header used by compiler
and runtime, is also moved into FortranCommon.
47 lines
1.8 KiB
C++
47 lines
1.8 KiB
C++
//===-- lib/Semantics/check-return.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 "check-return.h"
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#include "flang/Parser/message.h"
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#include "flang/Parser/parse-tree.h"
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#include "flang/Semantics/semantics.h"
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#include "flang/Semantics/tools.h"
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#include "flang/Support/Fortran-features.h"
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namespace Fortran::semantics {
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static const Scope *FindContainingSubprogram(const Scope &start) {
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const Scope &scope{GetProgramUnitContaining(start)};
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return scope.kind() == Scope::Kind::MainProgram ||
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scope.kind() == Scope::Kind::Subprogram
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? &scope
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: nullptr;
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}
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void ReturnStmtChecker::Leave(const parser::ReturnStmt &returnStmt) {
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// R1542 Expression analysis validates the scalar-int-expr
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// C1574 The return-stmt shall be in the inclusive scope of a function or
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// subroutine subprogram.
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// C1575 The scalar-int-expr is allowed only in the inclusive scope of a
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// subroutine subprogram.
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const auto &scope{context_.FindScope(context_.location().value())};
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if (const auto *subprogramScope{FindContainingSubprogram(scope)}) {
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if (returnStmt.v &&
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(subprogramScope->kind() == Scope::Kind::MainProgram ||
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IsFunction(*subprogramScope->GetSymbol()))) {
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context_.Say(
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"RETURN with expression is only allowed in SUBROUTINE subprogram"_err_en_US);
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} else if (subprogramScope->kind() == Scope::Kind::MainProgram) {
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context_.Warn(common::LanguageFeature::ProgramReturn,
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"RETURN should not appear in a main program"_port_en_US);
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}
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}
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}
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} // namespace Fortran::semantics
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