[llvm] [AMDGPU] Reland "Remove redundant s_cmp_lg_* sX, 0" (PR #164201)

[via llvm-commits]

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@@ -709,6 +709,50 @@ class SIInstrInfo final : public AMDGPUGenInstrInfo {
     }
   }
 
+  static bool setsSCCifResultIsNonZero(const MachineInstr &MI) {
+    switch (MI.getOpcode()) {
+    case AMDGPU::S_ABS_I32:
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LU-JOHN wrote:

Sorted.  Added S_WQM_*.

https://github.com/llvm/llvm-project/pull/164201