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With tasks, the cancel may happen in another task. This has a different
region info which means that we can't find it here.
Differential Revision: https://reviews.llvm.org/D30091
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@295474 91177308-0d34-0410-b5e6-96231b3b80d8
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This resolves a deadlock with the cancel directive when there is no explicit
cancellation point. In that case, the implicit barrier acts as cancellation
point. After removing the barrier after cancel, the now unmatched barrier for
the explicit cancellation point has to go as well.
This has probably worked before rL255992: With the calls for the explicit
barrier, it was sure that all threads passed a barrier before exiting.
Reported by Simon Convent and Joachim Protze!
Differential Revision: https://reviews.llvm.org/D30088
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@295473 91177308-0d34-0410-b5e6-96231b3b80d8
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Clang can generate LLVM IR for x86 without a registered x86 backend.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@284836 91177308-0d34-0410-b5e6-96231b3b80d8
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If 'sections' directive has only one sub-section, the code for 'single'-based directive was emitted. Removed this codegen, because it causes crashes in different cases.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@258495 91177308-0d34-0410-b5e6-96231b3b80d8
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#pragma omp parallel needs an implicit barrier that is currently done by an explicit call to __kmpc_barrier. However, the runtime already ensures a barrier in __kmpc_fork_call which currently leads to two barriers per region per thread.
Differential Revision: http://reviews.llvm.org/D15561
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@255992 91177308-0d34-0410-b5e6-96231b3b80d8
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if 'cancel' is found.
Patch improves codegen for OpenMP constructs. If the OpenMP region does not have internal 'cancel' construct, a call to 'void __kmpc_barrier()' runtime function is generated for all implicit/explicit barriers. If the region has inner 'cancel' directive, then
```
if (__kmpc_cancel_barrier())
exit from outer construct;
```
code is generated.
Also, the code for 'canellation point' directive is not generated if parent directive does not have 'cancel' directive.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@247681 91177308-0d34-0410-b5e6-96231b3b80d8
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of the llvm targets from clang/CodeGen into ClangCheck.cpp and CIndex.cpp.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241653 91177308-0d34-0410-b5e6-96231b3b80d8
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failures.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241642 91177308-0d34-0410-b5e6-96231b3b80d8
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r241620.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241623 91177308-0d34-0410-b5e6-96231b3b80d8
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Generate the next code for 'cancellation point':
if (__kmpc_cancellationpoint()) {
__kmpc_cancel_barrier();
<exit construct>;
}
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241336 91177308-0d34-0410-b5e6-96231b3b80d8
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Added explicit target to pch test
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241240 91177308-0d34-0410-b5e6-96231b3b80d8
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The next code is generated for this construct:
```
if (__kmpc_cancellationpoint(ident_t *loc, kmp_int32 global_tid, kmp_int32 cncl_kind) != 0)
<exit from outer innermost construct>;
```
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241239 91177308-0d34-0410-b5e6-96231b3b80d8
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