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[flang] Correct handling of assumed-rank allocatables in ALLOCATE (#66718)

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Construct entities that are associations from selectors in ASSOCIATE,
CHANGE TEAMS, and SELECT TYPE constructs do not have the ALLOCATABLE or
POINTER attributes, even when associating with allocatables or pointers;
associations from selectors in SELECT RANK constructs do have those
attributes.
This commit is contained in:
Peter Klausler 2023-09-19 12:27:35 -07:00 committed by GitHub
parent 01475dc29a
commit 682270877d
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 44 additions and 20 deletions
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12
flang/lib/Evaluate/tools.cpp
View File

@ -1475,8 +1475,16 @@ bool IsObjectPointer(const Symbol *original) {
bool IsAllocatableOrObjectPointer(const Symbol *original) {
if (original) {
const Symbol &symbol{GetAssociationRoot(*original)};
return IsAllocatable(symbol) || (IsPointer(symbol) && !IsProcedure(symbol));
const Symbol &ultimate{original->GetUltimate()};
if (const auto *assoc{ultimate.detailsIf<AssocEntityDetails>()}) {
// Only SELECT RANK construct entities can be ALLOCATABLE/POINTER.
return (assoc->rank() || assoc->IsAssumedSize() ||
assoc->IsAssumedRank()) &&
IsAllocatableOrObjectPointer(UnwrapWholeSymbolDataRef(assoc->expr()));
} else {
return IsAllocatable(ultimate) ||
(IsPointer(ultimate) && !IsProcedure(ultimate));
}
} else {
return false;
}

35
flang/lib/Semantics/check-allocate.cpp
View File

@ -89,13 +89,11 @@ private:
const int allocateCoarraySpecRank_{0};
const parser::Name &name_{parser::GetLastName(allocateObject_)};
// no USE or host association
const Symbol *original_{
const Symbol *ultimate_{
name_.symbol ? &name_.symbol->GetUltimate() : nullptr};
// no USE, host, or construct association
const Symbol *symbol_{original_ ? &ResolveAssociations(*original_) : nullptr};
const DeclTypeSpec *type_{symbol_ ? symbol_->GetType() : nullptr};
const int rank_{original_ ? original_->Rank() : 0};
const int corank_{symbol_ ? symbol_->Corank() : 0};
const DeclTypeSpec *type_{ultimate_ ? ultimate_->GetType() : nullptr};
const int rank_{ultimate_ ? ultimate_->Rank() : 0};
const int corank_{ultimate_ ? ultimate_->Corank() : 0};
bool hasDeferredTypeParameter_{false};
bool isUnlimitedPolymorphic_{false};
bool isAbstract_{false};
@ -448,11 +446,11 @@ static bool HaveCompatibleLengths(
}
bool AllocationCheckerHelper::RunChecks(SemanticsContext &context) {
if (!symbol_) {
if (!ultimate_) {
CHECK(context.AnyFatalError());
return false;
}
if (!IsVariableName(*symbol_)) { // C932 pre-requisite
if (!IsVariableName(*ultimate_)) { // C932 pre-requisite
context.Say(name_.source,
"Name in ALLOCATE statement must be a variable name"_err_en_US);
return false;
@ -465,7 +463,7 @@ bool AllocationCheckerHelper::RunChecks(SemanticsContext &context) {
return false;
}
GatherAllocationBasicInfo();
if (!IsAllocatableOrPointer(*symbol_)) { // C932
if (!IsAllocatableOrObjectPointer(ultimate_)) { // C932
context.Say(name_.source,
"Entity in ALLOCATE statement must have the ALLOCATABLE or POINTER attribute"_err_en_US);
return false;
@ -537,11 +535,16 @@ bool AllocationCheckerHelper::RunChecks(SemanticsContext &context) {
}
}
// Shape related checks
if (symbol_ && evaluate::IsAssumedRank(*symbol_)) {
if (ultimate_ && evaluate::IsAssumedRank(*ultimate_)) {
context.Say(name_.source,
"An assumed-rank object may not appear in an ALLOCATE statement"_err_en_US);
return false;
}
if (ultimate_ && IsAssumedSizeArray(*ultimate_) && context.AnyFatalError()) {
// An assumed-size dummy array or RANK(*) case of SELECT RANK will have
// already been diagnosed; don't pile on.
return false;
}
if (rank_ > 0) {
if (!hasAllocateShapeSpecList()) {
// C939
@ -568,7 +571,7 @@ bool AllocationCheckerHelper::RunChecks(SemanticsContext &context) {
.Say(name_.source,
"The number of shape specifications, when they appear, must match the rank of allocatable object"_err_en_US)
.Attach(
original_->name(), "Declared here with rank %d"_en_US, rank_);
ultimate_->name(), "Declared here with rank %d"_en_US, rank_);
return false;
}
}
@ -587,7 +590,7 @@ bool AllocationCheckerHelper::RunChecks(SemanticsContext &context) {
"If SOURCE appears, the related expression must be scalar or have the same rank as each allocatable object in ALLOCATE"_err_en_US)
.Attach(allocateInfo_.sourceExprLoc.value(),
"SOURCE expression has rank %d"_en_US, allocateInfo_.sourceExprRank)
.Attach(symbol_->name(),
.Attach(ultimate_->name(),
"Allocatable object declared here with rank %d"_en_US, rank_);
return false;
}
@ -611,11 +614,11 @@ bool AllocationCheckerHelper::RunChecks(SemanticsContext &context) {
bool AllocationCheckerHelper::RunCoarrayRelatedChecks(
SemanticsContext &context) const {
if (!symbol_) {
if (!ultimate_) {
CHECK(context.AnyFatalError());
return false;
}
if (evaluate::IsCoarray(*symbol_)) {
if (evaluate::IsCoarray(*ultimate_)) {
if (allocateInfo_.gotTypeSpec) {
// C938
if (const DerivedTypeSpec *
@ -665,8 +668,8 @@ bool AllocationCheckerHelper::RunCoarrayRelatedChecks(
context
.Say(name_.source,
"Corank of coarray specification in ALLOCATE must match corank of alloctable coarray"_err_en_US)
.Attach(
symbol_->name(), "Declared here with corank %d"_en_US, corank_);
.Attach(ultimate_->name(), "Declared here with corank %d"_en_US,
corank_);
return false;
}
}

17
flang/test/Semantics/select-rank03.f90
View File

@ -46,7 +46,6 @@ program test
!ERROR: RANK (*) cannot be used when selector is POINTER or ALLOCATABLE
rank (*)
!ERROR: Whole assumed-size array 'a' may not appear here without subscripts
!ERROR: Entity in ALLOCATE statement must have the ALLOCATABLE or POINTER attribute
allocate(a)
!ERROR: Whole assumed-size array 'a' may not appear here without subscripts
deallocate(a)
@ -58,6 +57,21 @@ program test
deallocate(a)
a = 1.
end select
! Test nested associations
select rank(a)
rank default
select rank(a)
rank default
select rank(a)
rank (0)
allocate(a) ! ok
deallocate(a) ! ok
rank (1)
allocate(a(1)) ! ok
deallocate(a) ! ok
end select
end select
end select
end
subroutine pointers(p)
real, pointer :: p(..)
@ -103,7 +117,6 @@ program test
!ERROR: RANK (*) cannot be used when selector is POINTER or ALLOCATABLE
rank (*)
!ERROR: Whole assumed-size array 'p' may not appear here without subscripts
!ERROR: Entity in ALLOCATE statement must have the ALLOCATABLE or POINTER attribute
allocate(p)
!ERROR: Whole assumed-size array 'p' may not appear here without subscripts
deallocate(p)