[llvm] ARM: Simplify logic for default libcall calling convention (PR #152166)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-arm

Author: Matt Arsenault (arsenm)

<details>
<summary>Changes</summary>

Not sure why this was listing all the darwin variants individually

---
Full diff: https://github.com/llvm/llvm-project/pull/152166.diff


1 Files Affected:

- (modified) llvm/include/llvm/IR/RuntimeLibcalls.td (+2-3) 


``````````diff
diff --git a/llvm/include/llvm/IR/RuntimeLibcalls.td b/llvm/include/llvm/IR/RuntimeLibcalls.td
index 5d1015e585e47..553a302aa47b6 100644
--- a/llvm/include/llvm/IR/RuntimeLibcalls.td
+++ b/llvm/include/llvm/IR/RuntimeLibcalls.td
@@ -1511,10 +1511,9 @@ def ARMSystemLibrary
                                                   (!TT.isiOS() || !TT.isOSVersionLT(5, 0))}]>>,
            DefaultStackProtector)> {
   let DefaultLibcallCallingConv = LibcallCallingConv<[{
-     (!TT.isOSDarwin() && !TT.isiOS() && !TT.isWatchOS() && !TT.isDriverKit()) ?
+     TT.isOSDarwin() ? CallingConv::C :
         (FloatABI == FloatABI::Hard ? CallingConv::ARM_AAPCS_VFP
-                                    : CallingConv::ARM_AAPCS) :
-                                      CallingConv::C
+                                    : CallingConv::ARM_AAPCS)
   }]>;
 }
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/152166