[llvm-branch-commits] [llvm] [RISCV] Support select optimization (PR #80124)

[Craig Topper via llvm-branch-commits]

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@@ -1046,6 +1046,14 @@ def FeatureFastUnalignedAccess
 def FeaturePostRAScheduler : SubtargetFeature<"use-postra-scheduler",
     "UsePostRAScheduler", "true", "Schedule again after register allocation">;
 
+def FeaturePredictableSelectIsExpensive
+  : SubtargetFeature<"predictable-select-expensive", "PredictableSelectIsExpensive",
+                     "true", "Prefer likely predicted branches over selects">;
+
+def FeatureEnableSelectOptimize
+  : SubtargetFeature<"enable-select-opt", "EnableSelectOptimize", "true",
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topperc wrote:

If there are no in tree targets using it should we default this to false?

https://github.com/llvm/llvm-project/pull/80124