llvm-project/clang
Roman Lebedev 9fb113e218 [AST][OpenMP] OpenMP Sections / Section constructs contain Structured blocks
Summary:
I'm working on a clang-tidy check, much like existing [[ http://clang.llvm.org/extra/clang-tidy/checks/bugprone-exception-escape.html | bugprone-exception-escape ]],
to detect when an exception might escape out of an OpenMP construct it isn't supposed to escape from.
For that i will be using the `nothrow` bit of `CapturedDecl`s.

While that bit is already correctly set for some constructs, e.g. `#pragma omp parallel`: https://godbolt.org/z/2La7pv
it isn't set for the `#pragma omp sections`, or `#pragma omp section`: https://godbolt.org/z/qZ-EbP

If i'm reading [[ https://www.openmp.org/wp-content/uploads/OpenMP-API-Specification-5.0.pdf | `OpenMP Application Programming Interface Version 5.0 November 2018` ]] correctly,
they should be, as per `2.8.1 sections Construct`, starting with page 86:
* The sections construct is a non-iterative worksharing construct that contains a set of **structured blocks**
  that are to be distributed among and executed by the threads in a team. Each **structured block** is executed
  once by one of the threads in the team in the context of its implicit task.
* The syntax of the sections construct is as follows:
  #pragma omp sections [clause[ [,] clause] ... ] new-line
    {
      [#pragma omp section new-line]
        **structured-block**
   ...
* Description
  Each **structured block** in the sections construct is preceded by a section directive except
  possibly **the first block**, for which a preceding section directive is optional.

* Restrictions
  • The code enclosed in a sections construct must be a **structured block**.
  * A throw executed inside a sections region must cause execution to resume within the same
    section of the sections region, and the same thread that threw the exception must catch it.

Reviewers: ABataev, #openmp

Reviewed By: ABataev

Subscribers: guansong, openmp-commits, cfe-commits

Tags: #clang, #openmp

Differential Revision: https://reviews.llvm.org/D57585

llvm-svn: 352882
2019-02-01 15:41:54 +00:00
..
INPUTS
bindings Fix python3 compability issue in clang binding 2019-01-24 10:34:44 +00:00
cmake [CMake][Fuchsia] Re-enable iOS runtimes for Fuchsia standard 2019-01-30 02:06:06 +00:00
docs [sanitizer-coverage] prune trace-cmp instrumentation for CMP isntructions that feed into the backedge branch. Instrumenting these CMP instructions is almost always useless (and harmful) for fuzzing 2019-01-31 23:43:00 +00:00
examples Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
include Fix isInSystemMacro to handle pasted macros 2019-02-01 06:11:44 +00:00
lib [AST][OpenMP] OpenMP Sections / Section constructs contain Structured blocks 2019-02-01 15:41:54 +00:00
runtime [CMake] External compiler-rt-configure requires LLVMTestingSupport when including tests 2019-02-01 15:35:25 +00:00
test [AST][OpenMP] OpenMP Sections / Section constructs contain Structured blocks 2019-02-01 15:41:54 +00:00
tools [libclang] Fix -DBUILD_SHARED_LIBS=on build after rC352803 2019-02-01 14:31:01 +00:00
unittests [CUDA] add support for the new kernel launch API in CUDA-9.2+. 2019-01-31 21:34:03 +00:00
utils [ASTDump] Rename methods which are conceptually Visits 2019-01-30 19:49:49 +00:00
www Adjust documentation for git migration. 2019-01-29 16:37:27 +00:00
.arcconfig
.clang-format
.clang-tidy Disable tidy checks with too many hits 2019-02-01 11:20:13 +00:00
.gitignore Adjust documentation for git migration. 2019-01-29 16:37:27 +00:00
CMakeLists.txt inhereit LLVM_ENABLE_LIBXML2 2018-11-29 14:57:14 +00:00
CODE_OWNERS.TXT Add myself as code owner for OpenBSD driver 2018-11-30 21:42:34 +00:00
INSTALL.txt
LICENSE.TXT Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
ModuleInfo.txt
NOTES.txt PTH-- Remove feature entirely- 2018-12-04 14:34:09 +00:00
README.txt

README.txt

//===----------------------------------------------------------------------===//
// C Language Family Front-end
//===----------------------------------------------------------------------===//

Welcome to Clang.  This is a compiler front-end for the C family of languages
(C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM
compiler infrastructure project.

Unlike many other compiler frontends, Clang is useful for a number of things
beyond just compiling code: we intend for Clang to be host to a number of
different source-level tools.  One example of this is the Clang Static Analyzer.

If you're interested in more (including how to build Clang) it is best to read
the relevant web sites.  Here are some pointers:

Information on Clang:             http://clang.llvm.org/
Building and using Clang:         http://clang.llvm.org/get_started.html
Clang Static Analyzer:            http://clang-analyzer.llvm.org/
Information on the LLVM project:  http://llvm.org/

If you have questions or comments about Clang, a great place to discuss them is
on the Clang development mailing list:
  http://lists.llvm.org/mailman/listinfo/cfe-dev

If you find a bug in Clang, please file it in the LLVM bug tracker:
  http://llvm.org/bugs/