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[clang][OpenMP] In 6.0, can omit length in array section #148048

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merged 2 commits into from
Jul 23, 2025
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[clang][OpenMP] In 6.0, can omit length in array section #148048

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[clang][OpenMP] In 6.0, can omit length in array section
ddpagan Jul 8, 2025
77ab217
Added LIT codegen test
ddpagan Jul 22, 2025
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2 changes: 1 addition & 1 deletion clang/docs/OpenMPSupport.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -443,7 +443,7 @@ implementation.
+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
| Traits for default device envirable | :none:`unclaimed` | :none:`unclaimed` | |
+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
| Optionally omit array length expression | :none:`unclaimed` | :none:`unclaimed` | |
| Optionally omit array length expression | :good:`done` | :none:`unclaimed` | https://github.com/llvm/llvm-project/pull/148048 |
+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
| Canonical loop sequences | :none:`unclaimed` | :none:`unclaimed` | |
+-------------------------------------------------------------+---------------------------+---------------------------+--------------------------------------------------------------------------+
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1 change: 1 addition & 0 deletions clang/docs/ReleaseNotes.rst
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Expand Up @@ -1316,6 +1316,7 @@ OpenMP Support
- Deprecation warning has been emitted for deprecated delimited form of ``declare target``.
- Added parsing and semantic analysis support for the 'need_device_addr'
modifier in the 'adjust_args' clause.
- Allow array length to be omitted in array section subscript expression.

Improvements
^^^^^^^^^^^^
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2 changes: 1 addition & 1 deletion clang/lib/Sema/SemaOpenMP.cpp
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Expand Up @@ -24392,7 +24392,7 @@ ExprResult SemaOpenMP::ActOnOMPArraySectionExpr(
return ExprError();
}
}
} else if (ColonLocFirst.isValid() &&
} else if (SemaRef.getLangOpts().OpenMP < 60 && ColonLocFirst.isValid() &&
(OriginalTy.isNull() || (!OriginalTy->isConstantArrayType() &&
!OriginalTy->isVariableArrayType()))) {
// OpenMP 5.0, [2.1.5 Array Sections]
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