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

[Pierre van Houtryve via llvm-branch-commits]

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@@ -165,6 +165,8 @@ enum RegBankLLTMappingApplyID {
   Sgpr32Trunc,
 
   // Src only modifiers: waterfalls, extends
+  Sgpr32_W,
+  SgprV4S32_W,
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Pierre-vh wrote:

Can you add a trailing comment or rename this ? The `_W` suffix is not immediately clear to me

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