[clang] [clang][Sema] Add noinline check for __builtin_frame_address and __builtin_return_address (PR #82966)

[Aaron Ballman via cfe-commits]

================
@@ -2730,17 +2730,33 @@ Sema::CheckBuiltinFunctionCall(FunctionDecl *FDecl, unsigned BuiltinID,
     if (SemaBuiltinConstantArgRange(TheCall, 0, 0, 0xFFFF))
       return ExprError();
 
-    // -Wframe-address warning if non-zero passed to builtin
-    // return/frame address.
     Expr::EvalResult Result;
     if (!TheCall->getArg(0)->isValueDependent() &&
-        TheCall->getArg(0)->EvaluateAsInt(Result, getASTContext()) &&
-        Result.Val.getInt() != 0)
-      Diag(TheCall->getBeginLoc(), diag::warn_frame_address)
-          << ((BuiltinID == Builtin::BI__builtin_return_address)
-                  ? "__builtin_return_address"
-                  : "__builtin_frame_address")
-          << TheCall->getSourceRange();
+        TheCall->getArg(0)->EvaluateAsInt(Result, getASTContext())) {
+      const char *BuiltinName =
+          (BuiltinID == Builtin::BI__builtin_return_address)
+              ? "__builtin_return_address"
+              : "__builtin_frame_address";
+
+      // -Wframe-address warning if non-zero passed to builtin
+      // return/frame address.
+      if (Result.Val.getInt() != 0) {
+        Diag(TheCall->getBeginLoc(), diag::warn_frame_address)
+            << BuiltinName << TheCall->getSourceRange();
+      }
+
+      // -Wframe-address warning if enclosing function is not marked noinline.
+      if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurContext)) {
+        if (!FD->hasAttr<NoInlineAttr>() && !FD->isMain()) {
----------------
AaronBallman wrote:

Should we be looking at `FunctionDecl::isMSVCRTEntryPoint()` in addition to `isMain()`?

https://github.com/llvm/llvm-project/pull/82966