[llvm] [AMDGPU] Split wide integer dpp8 intrinsic calls (PR #113500)

[Matt Arsenault via llvm-commits]

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@@ -2257,6 +2260,38 @@ bool AMDGPUCodeGenPrepareImpl::visitSqrt(IntrinsicInst &Sqrt) {
   return true;
 }
 
+// Split unsupported wide integer calls.
+bool AMDGPUCodeGenPrepareImpl::visitMovDppIntrinsic(IntrinsicInst &I) {
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arsenm wrote:

This is purely lowering. We already have the code to split arbitrary readfirstlane etc. intrinsics, this is no different (e.g. see 5feb32ba929f9e517c530217cabb09d1d734a763)

https://github.com/llvm/llvm-project/pull/113500