[PATCH] D23896: [InstCombine] Try to resubmit the combine of A->B->A BitCast and fix for pr27996

[Evgeny Stupachenko via llvm-commits]

evstupac added inline comments.

================
Comment at: lib/Transforms/InstCombine/InstCombineCasts.cpp:1768
@@ +1767,3 @@
+  for (User *U : CI.users()) {
+    if (!(isa<LoadInst>(U) || isa<StoreInst>(U)))
+      return false;
----------------
Here you check that for
b = BitCast(p)
All Users are 
"st b", "st to address b" or "ld from address b"
I don't see how your transformation can create BitCast for "load form b".


https://reviews.llvm.org/D23896