MSP430: Move libcall CC setting to RuntimeLibcallsInfo

[arsenm]

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.

[arsenm]

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• ARM: Start moving runtime libcalls into tablegen #146084
• ARM: Unconditionally set eabi libcall calling convs in RuntimeLibcalls #146083
• RuntimeLibcalls: Remove table of soft float compare cond codes #146082
• MSP430: Move libcall CC setting to RuntimeLibcallsInfo #146081 👈 (View in Graphite)
• Lanai: Use TableGen to set libcall calling conventions #146080
• TableGen: Handle setting runtime libcall calling conventions #144980
• RuntimeLibcalls: Associate calling convention with libcall impls #144979
• TableGen: Allow defining sets of runtime libraries #144978
• AArch64: Add libcall impl declarations for __arm_sc* memory functions #144977
• XCore: Declare libcalls used for align 4 memcpy #144976
• Hexagon: Add libcall declarations for special memcpy #144975
• ARM: Add runtime libcall definitions for aebi memory functions #144974
• TableGen: Generate enum for runtime libcall implementations #144973
• TableGen: Add runtime libcall backend #144972
• PowerPC: Stop reporting memcpy as an alias of memmove on AIX #143836
• main

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[llvmbot]

@llvm/pr-subscribers-backend-msp430
@llvm/pr-subscribers-llvm-ir

@llvm/pr-subscribers-tablegen

Author: Matt Arsenault (arsenm)

Changes

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.

---

Full diff: https://github.com/llvm/llvm-project/pull/146081.diff

2 Files Affected:

• (modified) llvm/lib/IR/RuntimeLibcalls.cpp (+5)
• (modified) llvm/lib/Target/MSP430/MSP430ISelLowering.cpp (-2)

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));