[Clang] Add template argument support for {con,de}structor attributes. (#151400)

Fixes: https://github.com/llvm/llvm-project/issues/67154

{Con, De}structor attributes in Clang only work with integer priorities
(inconsistent with GCC). This commit adds support to these attributes
for template arguments.

Built off of contributions from [abrachet](https://github.com/abrachet)
in [#67376](https://github.com/llvm/llvm-project/pull/67376).

1 files changed, 10 insertions, 2 deletions

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index c0cfc24..87d2cd4 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -6376,10 +6376,18 @@ void CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD,
 
   SetLLVMFunctionAttributesForDefinition(D, Fn);
 
+  auto GetPriority = [this](const auto *Attr) -> int {
+    Expr *E = Attr->getPriority();
+    if (E) {
+      return E->EvaluateKnownConstInt(this->getContext()).getExtValue();
+    }
+    return Attr->DefaultPriority;
+  };
+
   if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>())
-    AddGlobalCtor(Fn, CA->getPriority());
+    AddGlobalCtor(Fn, GetPriority(CA));
   if (const DestructorAttr *DA = D->getAttr<DestructorAttr>())
-    AddGlobalDtor(Fn, DA->getPriority(), true);
+    AddGlobalDtor(Fn, GetPriority(DA), true);
   if (getLangOpts().OpenMP && D->hasAttr<OMPDeclareTargetDeclAttr>())
     getOpenMPRuntime().emitDeclareTargetFunction(D, GV);
 }