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[flang] Don't associate pointers with zero sized storage targets #155867

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Merged
merged 5 commits into from
Aug 28, 2025
Merged

[flang] Don't associate pointers with zero sized storage targets #155867

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96e80af
[flang] Don't associate pointers with zero sized storage targets
eugeneepshteyn Aug 28, 2025
2b671c3
Moved the check to PointerIsAssociatedWith()
eugeneepshteyn Aug 28, 2025
60addf8
Simplify
eugeneepshteyn Aug 28, 2025
eff8a33
Also check for array with no elements
eugeneepshteyn Aug 28, 2025
ca48aa4
clang-format
eugeneepshteyn Aug 28, 2025
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5 changes: 3 additions & 2 deletions flang-rt/lib/runtime/pointer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -267,8 +267,9 @@ bool RTDEF(PointerIsAssociatedWith)(
if (!target) {
return pointer.raw().base_addr != nullptr;
}
if (!target->raw().base_addr ||
(target->raw().type != CFI_type_struct && target->ElementBytes() == 0)) {
if (!target->raw().base_addr || target->ElementBytes() == 0) {
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@klausler klausler Aug 28, 2025

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what about the case of ElementBytes() != 0 but no elements?

// F2023, 16.9.20, p5, case (v)-(vi): don't associate pointers with
// targets that have zero sized storage sequence.
return false;
}
int rank{pointer.rank()};
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