================
@@ -12251,6 +12264,9 @@ bool Sema::CheckFunctionDeclaration(Scope *S,
FunctionDecl *NewFD,
if (NewFD->hasAttr<SYCLKernelEntryPointAttr>())
SYCL().CheckSYCLEntryPointFunctionDecl(NewFD);
+ if (NewFD->hasAttr<SYCLExternalAttr>())
+ SYCL().CheckSYCLExternalFunctionDecl(NewFD);
----------------
tahonermann wrote:
I debugged a bit. It looks like `getSpecializationKind()` is always returning
`TSK_ImplicitInstantiation` at the point where we are checking it. I added a
dump of the function declaration at the time of diagnosis and compared that to
what is generated by `-Xclang -ast-dump`. Note the same addresses below, but
the different specialization information.
Dumped decl:
```
FunctionDecl 0xdf89eb0 <.../sycl-external-attr.cpp:25:26, col:40> col:31 func6
'void ()' implicit_instantiation
|-TemplateArgument type '(anonymous namespace)::S6'
| `-RecordType 0xdf67730 '(anonymous namespace)::S6'
| `-CXXRecord 0xdf67698 'S6'
`-SYCLExternalAttr 0xdf89fa8 <col:3, col:10>
```
Output from `-Xclang -ast-dump`:
```
| `-FunctionDecl 0xdf89eb0 <col:26, col:40> col:31 func6 'void ()'
explicit_instantiation_definition
| |-TemplateArgument type '(anonymous namespace)::S6'
| | `-RecordType 0xdf67730 '(anonymous namespace)::S6'
| | `-CXXRecord 0xdf67698 'S6'
| |-CompoundStmt 0xdf67b10 <col:39, col:40>
| `-SYCLExternalAttr 0xdf89fa8 <col:3, col:10>
```
https://github.com/llvm/llvm-project/pull/140282
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