[llvm-branch-commits] [llvm] AMDGPU/GlobalISel: Add waterfall lowering in regbanklegalize (PR #142790)

[Pierre van Houtryve via llvm-branch-commits]

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@@ -117,45 +117,73 @@ static LLT getReadAnyLaneSplitTy(LLT Ty) {
   return LLT::scalar(32);
 }
 
-static Register buildReadAnyLane(MachineIRBuilder &B, Register VgprSrc,
-                                 const RegisterBankInfo &RBI);
+typedef std::function<MachineInstrBuilder(MachineIRBuilder &, Register,
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Pierre-vh wrote:

use `using` instead, also consider using `function_ref` if this is never stored

https://github.com/llvm/llvm-project/pull/142790
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