[llvm] AArch64: Fix hardcoding calling convention of sincos_stret (PR #144336)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm created https://github.com/llvm/llvm-project/pull/144336

None

>From 16c9804e26a9e14252534ee01f41f1af7885c1f4 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault at amd.com>
Date: Mon, 16 Jun 2025 20:34:46 +0900
Subject: [PATCH] AArch64: Fix hardcoding calling convention of sincos_stret

---
 llvm/lib/Target/AArch64/AArch64ISelLowering.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
index 7519ac5260a64..54271d4d84420 100644
--- a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
@@ -5106,9 +5106,10 @@ SDValue AArch64TargetLowering::LowerFSINCOS(SDValue Op,
 
   StructType *RetTy = StructType::get(ArgTy, ArgTy);
   TargetLowering::CallLoweringInfo CLI(DAG);
+  CallingConv::ID CC = getLibcallCallingConv(LC);
   CLI.setDebugLoc(dl)
       .setChain(DAG.getEntryNode())
-      .setLibCallee(CallingConv::Fast, RetTy, Callee, std::move(Args));
+      .setLibCallee(CC, RetTy, Callee, std::move(Args));
 
   std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
   return CallResult.first;