[clang] [Clang] Propagate elide safe context through [[clang::coro_must_await]] (PR #108474)

[Chuanqi Xu via cfe-commits]

================
@@ -849,12 +849,30 @@ static bool isAttributedCoroAwaitElidable(const QualType 
&QT) {
   return Record && Record->hasAttr<CoroAwaitElidableAttr>();
 }
 
-static bool isCoroAwaitElidableCall(Expr *Operand) {
-  if (!Operand->isPRValue()) {
-    return false;
+static void applySafeElideContext(Expr *Operand) {
+  auto *Call = dyn_cast<CallExpr>(Operand->IgnoreImplicit());
+  if (!Call || !Call->isPRValue())
+    return;
+
+  if (!isAttributedCoroAwaitElidable(Call->getType()))
+    return;
+
+  Call->setCoroElideSafe();
+
+  // Check parameter
+  auto *Fn = llvm::dyn_cast_if_present<FunctionDecl>(Call->getCalleeDecl());
+  if (!Fn) {
+    Call->dump();
----------------
ChuanqiXu9 wrote:

```suggestion

```

https://github.com/llvm/llvm-project/pull/108474
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