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[flang][OpenMP] Catch threadprivate common block vars that appear in equivalence #127642

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Merged
merged 2 commits into from
Feb 20, 2025
Merged

[flang][OpenMP] Catch threadprivate common block vars that appear in equivalence #127642

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1cbe00d
[flang][OpenMP] Catch threadprivate common block vars that appear in …
luporl Feb 18, 2025
b9c55a2
Fix style and format
luporl Feb 19, 2025
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17 changes: 16 additions & 1 deletion flang/lib/Semantics/check-omp-structure.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1479,7 +1479,22 @@ void OmpStructureChecker::CheckThreadprivateOrDeclareTargetVar(
}
}
},
[&](const parser::Name &) {}, // common block
[&](const parser::Name &name) {
if (!name.symbol) {
return;
}
if (auto *cb{name.symbol->detailsIf<CommonBlockDetails>()}) {
for (const auto &obj : cb->objects()) {
if (FindEquivalenceSet(*obj)) {
context_.Say(name.source,
"A variable in a %s directive cannot appear in an EQUIVALENCE statement"
" (variable '%s' from common block '/%s/')"_err_en_US,
ContextDirectiveAsFortran(), obj->name(),
name.symbol->name());
}
}
}
},
},
ompObject.u);
}
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6 changes: 6 additions & 0 deletions flang/test/Semantics/OpenMP/threadprivate02.f90
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Expand Up @@ -7,6 +7,9 @@ program threadprivate02
integer :: arr1(10)
common /blk1/ a1
real, save :: eq_a, eq_b, eq_c, eq_d
integer :: eq_e, eq_f
equivalence(eq_e, eq_f)
common /blk2/ eq_e

!$omp threadprivate(arr1)

Expand All @@ -25,6 +28,9 @@ program threadprivate02
!$omp threadprivate(eq_c)
equivalence(eq_c, eq_d)

!ERROR: A variable in a THREADPRIVATE directive cannot appear in an EQUIVALENCE statement (variable 'eq_e' from common block '/blk2/')
!$omp threadprivate(/blk2/)

contains
subroutine func()
integer :: arr2(10)
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