[PATCH] D36069: [X86][InstCombine] Add some constant folding for BZHI intrinsics

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


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Comment at: lib/Transforms/InstCombine/InstCombineCalls.cpp:2282
+      if (Index >= BitWidth)
+        return replaceInstUsesWith(CI, II->getArgOperand(0));
+      if (Index == 0)
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Can we support this case? It guarantees that the CF flag is set.


https://reviews.llvm.org/D36069