[llvm] Add constant folding for llvm.experimental.cttz.elts #182324 (PR #182895)

[Luke Lau via llvm-commits]

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@@ -1,6 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 6
-; RUN: opt -passes=loop-vectorize -force-vector-width=2 -force-vector-interleave=1 -force-tail-folding-style=none -S %s | FileCheck --check-prefix=VF2 %s
-; RUN: opt -passes=loop-vectorize -force-vector-width=4 -force-vector-interleave=1 -force-tail-folding-style=none -S %s | FileCheck %s
+; RUN: opt -passes=loop-vectorize,instcombine -force-vector-width=2 -force-vector-interleave=1 -S %s | FileCheck --check-prefix=VF2 %s
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lukel97 wrote:

Now that we have dedicated test coverage in llvm/test/Transforms/InstSimplify/ConstProp/cttz-elts.ll you can just remove the changes from this loop vectorizer test

https://github.com/llvm/llvm-project/pull/182895