[llvm] [AMDGPU] Improve execz branch removal for async load-to-LDS (PR #192341)

[Matt Arsenault via llvm-commits]

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@@ -428,7 +452,16 @@ class BranchWeightCostModel {
     if (TII.isWaitcnt(MI.getOpcode()))
       return false;
 
-    ThenCyclesCost += SchedModel.computeInstrLatency(&MI);
+    // gfx1250 async loads to LDS: use issue cost (1 cycle) instead of the
+    // scheduling model's resource latency so the cost model can remove the
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arsenm wrote:

Why not fix the scheduling model?

https://github.com/llvm/llvm-project/pull/192341