[PATCH] D19488: [CodeGenPrepare] use branch weight metadata to decide if a select should be turned into a branch

[David Li via llvm-commits]

davidxl added inline comments.

================
Comment at: lib/CodeGen/CodeGenPrepare.cpp:4558
@@ +4557,3 @@
+    auto Probability = BranchProbability::getBranchProbability(Max, Sum);
+    if (Probability > TLI->getPredictableBranchThreshold())
+      return true;
----------------
Hal,  this is an example that profile meta data is directly looked at instead of via BPI (I don't have an issue with it -- but just a note this scenario exists).


http://reviews.llvm.org/D19488