[llvm] [RISCV][LoopVectorize] Use DataWithEVL as the preferred tail folding style (PR #148686)

[Philip Reames via llvm-commits]

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@@ -1,7 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --filter-out-after "^scalar.ph:" --version 2
 ; RUN: opt -mtriple=riscv64-none-linux-gnu -S -passes=loop-vectorize,instcombine -mattr=+v -prefer-predicate-over-epilogue=scalar-epilogue %s 2>&1 | FileCheck %s -check-prefix=SCALAR_EPILOGUE
 ; RUN: opt -mtriple=riscv64-none-linux-gnu -S -passes=loop-vectorize,instcombine -mattr=+v -prefer-predicate-over-epilogue=predicate-dont-vectorize %s 2>&1 | FileCheck %s -check-prefix=PREDICATED_TAIL_FOLDING
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preames wrote:

I would prefer to have you add explicit tail folding style to these two run lines.  I do want to have both variants tested.  You could do that in a precommit, and this file would disappear from this review entirely.  While you're at is, maybe renamed PREDICATED_TAIL_FOLDED to PREDICATED_MASK?

https://github.com/llvm/llvm-project/pull/148686