[llvm-branch-commits] [llvm] MSP430: Move libcall CC setting to RuntimeLibcallsInfo (PR #146081)

[Matt Arsenault via llvm-branch-commits]

https://github.com/arsenm updated https://github.com/llvm/llvm-project/pull/146081

>From 78df65066d4209ace408942be82107681bd135ec Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault at amd.com>
Date: Mon, 23 Jun 2025 16:35:14 +0900
Subject: [PATCH] MSP430: Move libcall CC setting to RuntimeLibcallsInfo

As a temporary step configure the calling convention here. This
can't be moved into tablegen until RuntimeLibcallsInfo is split
into a separate lowering component.
---
 llvm/lib/IR/RuntimeLibcalls.cpp               | 5 +++++
 llvm/lib/Target/MSP430/MSP430ISelLowering.cpp | 2 --
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/IR/RuntimeLibcalls.cpp b/llvm/lib/IR/RuntimeLibcalls.cpp
index 6f1f7014249c7..a5605329c7d28 100644
--- a/llvm/lib/IR/RuntimeLibcalls.cpp
+++ b/llvm/lib/IR/RuntimeLibcalls.cpp
@@ -365,6 +365,11 @@ void RuntimeLibcallsInfo::initLibcalls(const Triple &TT,
         RTLIB::HEXAGON_MEMCPY_LIKELY_ALIGNED_MIN32BYTES_MULT8BYTES,
         RTLIB::__hexagon_memcpy_likely_aligned_min32bytes_mult8bytes);
   }
+
+  if (TT.getArch() == Triple::ArchType::msp430) {
+    setLibcallImplCallingConv(RTLIB::__mspabi_mpyll,
+                              CallingConv::MSP430_BUILTIN);
+  }
 }
 
 bool RuntimeLibcallsInfo::darwinHasExp10(const Triple &TT) {
diff --git a/llvm/lib/Target/MSP430/MSP430ISelLowering.cpp b/llvm/lib/Target/MSP430/MSP430ISelLowering.cpp
index d558dd253dc46..0d7c7b5c7a813 100644
--- a/llvm/lib/Target/MSP430/MSP430ISelLowering.cpp
+++ b/llvm/lib/Target/MSP430/MSP430ISelLowering.cpp
@@ -208,8 +208,6 @@ MSP430TargetLowering::MSP430TargetLowering(const TargetMachine &TM,
     for (const auto &LC : LibraryCalls) {
       setLibcallImpl(LC.Op, LC.Impl);
     }
-    setLibcallImplCallingConv(RTLIB::__mspabi_mpyll,
-                              CallingConv::MSP430_BUILTIN);
   }
 
   setMinFunctionAlignment(Align(2));