[PATCH] D15177: [LoopVectorizer] Refine loop vectorizer's register usage calculator by ignoring specific instructions.

[Cong Hou via llvm-commits]

congh added inline comments.

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Comment at: lib/Transforms/Vectorize/LoopVectorize.cpp:5645
@@ +5644,3 @@
+    SmallPtrSetImpl<Instruction *> &Casts = RedDes.getCastInsts();
+    VecValuesToIgnore.insert(Casts.begin(), Casts.end());
+  }
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Now the only contributor are ephemeral values that are added above.


http://reviews.llvm.org/D15177