[llvm] [AMDGPU] Add inreg support for SGPR arguments (PR #67182)

[Matt Arsenault via llvm-commits]

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@@ -2566,7 +2566,7 @@ bool isArgPassedInSGPR(const CallBase *CB, unsigned ArgNo) {
            CB->paramHasAttr(ArgNo, Attribute::ByVal);
   default:
     // TODO: Should calls support inreg for SGPR inputs?
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arsenm wrote:

Remove addressed todo?

https://github.com/llvm/llvm-project/pull/67182