================
@@ -1976,14 +1976,16 @@
TemplateDeclInstantiator::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
if (!InstParams)
return nullptr;
+ // Use canonical templated decl because only canonical decl has body
+ // if declarations were merged during loading from modules.
+ FunctionDecl *TemplatedDecl = D->getTemplatedDecl()->getCanonicalDecl();
----------------
dmpolukhin wrote:
`FunctionDecl::hasBody` is doing what you described for `getRedeclWithDef`, see
https://github.com/llvm/llvm-project/blob/main/clang/lib/AST/Decl.cpp#L3163 and
if I used it here or implement similar code here, it fails several clang tests.
It is very unfortunate that `Redeclarable` is used for two things: real
redeclaration and AST merges. Moreover it look like there is no way to
distinguish these two cases. I need to use different decl only if the decl was
`doesThisDeclarationHaveABody() == true` but it is no longer the case due to
AST merge.
https://github.com/llvm/llvm-project/pull/111992
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