[llvm] [AArch64] Update comment on GHC CC (PR #72761)

[David Green via llvm-commits]

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@@ -344,8 +344,10 @@ def CC_AArch64_DarwinPCS_ILP32_VarArg : CallingConv<[
 //
 //    https://ghc.haskell.org/trac/ghc/wiki/Commentary/Compiler/GeneratedCode
 //
-// The AArch64 register mapping is under the heading "The ARMv8/AArch64 ABI
-// register mapping".
+// The AArch64 register mapping is defined in the following header file:
+//
+//    https://github.com/ghc/ghc/blob/master/rts/include/stg/MachRegs/arm32.h
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davemgreen wrote:

Should this one be pointing at arm64.h?

https://github.com/llvm/llvm-project/pull/72761