[llvm] [AMDGPU] Use s_cmovk_i32 instead of s_cselect_b32 when applicable (PR #135232)

[Matt Arsenault via llvm-commits]

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@@ -883,6 +883,50 @@ bool SIShrinkInstructions::run(MachineFunction &MF) {
         }
       }
 
+      // Try to use S_MOVK_I32
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arsenm wrote:

Comment doesn't match 

https://github.com/llvm/llvm-project/pull/135232