[llvm] [AMDGPU] Remove unnecessary add instructions in ctlz.i8 (PR #77615)

[Jay Foad via llvm-commits]

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@@ -446,6 +446,10 @@ AMDGPUTargetLowering::AMDGPUTargetLowering(const TargetMachine &TM,
       {ISD::CTTZ, ISD::CTTZ_ZERO_UNDEF, ISD::CTLZ, ISD::CTLZ_ZERO_UNDEF},
       MVT::i64, Custom);
 
+  for (auto VT : {MVT::i8, MVT::i16}) {
+    setOperationAction({ISD::CTLZ, ISD::CTLZ_ZERO_UNDEF}, VT, Custom);
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jayfoad wrote:

Nit: don't need braces around a single physical line.

https://github.com/llvm/llvm-project/pull/77615