Skip to content

[flang] Allow for equivalent types in non-TBP defined I/O #158755

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Sep 17, 2025
Merged

[flang] Allow for equivalent types in non-TBP defined I/O #158755

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
30 changes: 25 additions & 5 deletions flang/lib/Semantics/runtime-type-info.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1385,12 +1385,31 @@ CollectNonTbpDefinedIoGenericInterfaces(
if (const DeclTypeSpec *
declType{GetDefinedIoSpecificArgType(*specific)}) {
const DerivedTypeSpec &derived{DEREF(declType->AsDerived())};
if (const Symbol *
dtDesc{derived.scope()
? derived.scope()->runtimeDerivedTypeDescription()
const Scope *derivedScope{derived.scope()};
if (!declType->IsPolymorphic()) {
// A defined I/O subroutine with a monomorphic "dtv" dummy
// argument implies a non-extensible sequence or BIND(C) derived
// type. Such types may be defined more than once in the program
// so long as they are structurally equivalent. If the current
// scope has an equivalent type, use it for the table rather
// than the "dtv" argument's type.
if (const Symbol *inScope{scope.FindSymbol(derived.name())}) {
const Symbol &ultimate{inScope->GetUltimate()};
DerivedTypeSpec localDerivedType{inScope->name(), ultimate};
if (ultimate.has<DerivedTypeDetails>() &&
evaluate::DynamicType{derived, /*isPolymorphic=*/false}
.IsTkCompatibleWith(evaluate::DynamicType{
localDerivedType, /*iP=*/false})) {
derivedScope = ultimate.scope();
}
}
}
if (const Symbol *dtDesc{derivedScope
? derivedScope->runtimeDerivedTypeDescription()
: nullptr}) {
if (useRuntimeTypeInfoEntries &&
&derived.scope()->parent() == &generic->owner()) {
derivedScope == derived.scope() &&
&derivedScope->parent() == &generic->owner()) {
// This non-TBP defined I/O generic was defined in the
// same scope as the derived type, and it will be
// included in the derived type's special bindings
Expand Down Expand Up @@ -1454,7 +1473,8 @@ static const Symbol *FindSpecificDefinedIo(const Scope &scope,
const Symbol &specific{*ref};
if (const DeclTypeSpec *
thisType{GetDefinedIoSpecificArgType(specific)}) {
if (evaluate::DynamicType{DEREF(thisType->AsDerived()), true}
if (evaluate::DynamicType{
DEREF(thisType->AsDerived()), thisType->IsPolymorphic()}
.IsTkCompatibleWith(derived)) {
return &specific.GetUltimate();
}
Expand Down