[PATCH] D88662: [ARM] Prevent constants from ICmp instruction from being hoisted if part of a min(max()) pattern

[Meera Nakrani via Phabricator via llvm-commits]

MeeraN created this revision.
MeeraN added reviewers: dmgreen, SjoerdMeijer, samparker, pbarrio, jmolloy, mcrosier, rengolin.
Herald added subscribers: danielkiss, zzheng, hiraditya, kristof.beyls.
Herald added a project: LLVM.
MeeraN requested review of this revision.

Marks constants of an ICmp instruction as free if it's only user is a select 
instruction that is part of a min(max()) pattern. Ensures that in loops, in
particular when loop unrolling is turned on, SSAT will still be correctly generated.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D88662

Files:
  llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
  llvm/test/CodeGen/ARM/ssat-unroll-loops.ll

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