[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 715cfc80ad3ca2b9451a6f544ad64c11ab7afde1 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <matthew.arsena...@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 1376ffc7c7293..8c3257147213d 100644
--- a/llvm/lib/IR/RuntimeLibcalls.cpp
+++ b/llvm/lib/IR/RuntimeLibcalls.cpp
@@ -364,6 +364,11 @@ 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 1dc0f4a7d384b..d1474c7f248e9 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));

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