Skip to content

[clang] Instantiate attributes on LabelDecls #115924

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 12 commits into from
Nov 15, 2024
Merged

[clang] Instantiate attributes on LabelDecls #115924

Show file tree
Hide file tree
Changes from 2 commits
Commits
Show all changes
12 commits
Select commit Hold shift + click to select a range
da2e66a
[clang] Instantiate attributes on other decl types
ericastor Nov 12, 2024
a6b8309
Merge branch 'llvm:main' into attributes
ericastor Nov 12, 2024
eb4b3a2
Include attributes on LabelStmts (forwarding from decls) in AST dumps
ericastor Nov 14, 2024
6ba54c4
Scope this change back to just applying to LabelDecls
ericastor Nov 14, 2024
a9f73b9
Merge branch 'llvm:main' into attributes
ericastor Nov 14, 2024
627a4d2
Add test using standard attribute
ericastor Nov 14, 2024
e0d7698
Remove unnecessary use of plugins for testing
ericastor Nov 14, 2024
fb705ad
Fix the no-attributes case
ericastor Nov 14, 2024
9622499
Clean up & simplify tests
ericastor Nov 15, 2024
a87977a
Merge branch 'main' into attributes
ericastor Nov 15, 2024
fe5f361
Add actual test (missed in previous commit)
ericastor Nov 15, 2024
778e2b5
Merge branch 'main' into attributes
ericastor Nov 15, 2024
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
16 changes: 13 additions & 3 deletions clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -990,6 +990,7 @@ Decl *
TemplateDeclInstantiator::VisitLabelDecl(LabelDecl *D) {
LabelDecl *Inst = LabelDecl::Create(SemaRef.Context, Owner, D->getLocation(),
D->getIdentifier());
SemaRef.InstantiateAttrs(TemplateArgs, D, Inst, LateAttrs, StartingScope);
Owner->addDecl(Inst);
return Inst;
}
Expand All @@ -1009,6 +1010,7 @@ TemplateDeclInstantiator::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
D->getQualifierLoc(),
D->getTargetNameLoc(),
D->getNamespace());
SemaRef.InstantiateAttrs(TemplateArgs, D, Inst, LateAttrs, StartingScope);
Owner->addDecl(Inst);
return Inst;
}
Expand Down Expand Up @@ -1095,15 +1097,21 @@ Decl *TemplateDeclInstantiator::InstantiateTypedefNameDecl(TypedefNameDecl *D,

Decl *TemplateDeclInstantiator::VisitTypedefDecl(TypedefDecl *D) {
Decl *Typedef = InstantiateTypedefNameDecl(D, /*IsTypeAlias=*/false);
if (Typedef)
if (Typedef) {
SemaRef.InstantiateAttrs(TemplateArgs, D, Typedef, LateAttrs,
StartingScope);
Owner->addDecl(Typedef);
}
return Typedef;
}

Decl *TemplateDeclInstantiator::VisitTypeAliasDecl(TypeAliasDecl *D) {
Decl *Typedef = InstantiateTypedefNameDecl(D, /*IsTypeAlias=*/true);
if (Typedef)
if (Typedef) {
SemaRef.InstantiateAttrs(TemplateArgs, D, Typedef, LateAttrs,
StartingScope);
Owner->addDecl(Typedef);
}
return Typedef;
}

Expand Down Expand Up @@ -1160,8 +1168,10 @@ Decl *TemplateDeclInstantiator::InstantiateTypeAliasTemplateDecl(
Decl *
TemplateDeclInstantiator::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
Decl *Inst = InstantiateTypeAliasTemplateDecl(D);
if (Inst)
if (Inst) {
SemaRef.InstantiateAttrs(TemplateArgs, D, Inst, LateAttrs, StartingScope);
Owner->addDecl(Inst);
}

return Inst;
}
Expand Down
4 changes: 2 additions & 2 deletions clang/test/SemaCXX/attr-mode-tmpl.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ void CheckEnumerations() {
// Check that non-vector 'mode' attribute is OK with enumeration types.
typedef T __attribute__((mode(QI))) T1;
typedef T T2 __attribute__((mode(HI)));
typedef T __attribute__((mode(V8SI))) T3; // expected-error{{mode 'V8SI' is not supported for enumeration types}}
typedef T __attribute__((mode(V8SI))) T3; // expected-error2{{mode 'V8SI' is not supported for enumeration types}}
Copy link
Collaborator

@erichkeane erichkeane Nov 12, 2024

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

This looks like it should just cause the expected check to go away? What is going on here? If this is causing it to happen 2x, we might wonder if the attribute mode should have not been generated if it errored the 1st time.

Copy link
Contributor Author

@ericastor ericastor Nov 12, 2024

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Yeah, unfortunately the way InstantiateAttrs is implemented seems to cause it to copy attributes even if they errored previously. You can see this used elsewhere in the same file for much the same reason... this is a case where we're just having a pre-existing problem show up in a new scenario.

// expected-warning@-1{{specifying vector types with the 'mode' attribute is deprecated}}

typedef enum __attribute__((mode(HI))) { A4, B4 } T4;
Expand Down Expand Up @@ -62,7 +62,7 @@ struct TemplatedStruct {

// Check typedefs.
typedef T __attribute__((mode(DI))) T1;
typedef T __attribute__((mode(V8DI))) T2; // expected-error{{mode 'V8DI' is not supported for enumeration types}}
typedef T __attribute__((mode(V8DI))) T2; // expected-error2{{mode 'V8DI' is not supported for enumeration types}}
// expected-warning@-1{{deprecated}}

// Check parameters.
Expand Down
Loading