[PATCH] D87457: [ARM][TTI] Prevents constants in a min/max pattern from being hoisted when in a loop

[Meera Nakrani via Phabricator via llvm-commits]

MeeraN created this revision.
MeeraN added reviewers: dmgreen, SjoerdMeijer, samparker, pbarrio, mcrosier, jmolloy, rengolin.
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Changes TTI function getIntImmCostInst to take an additional Instruction parameter, which enables us to be able to check it is part of a min/max pattern. We can then mark the constant used as free to prevent it being hoisted so SSAT/USAT can still be generated. 
Required minor changes in some non-ARM backends to allow for the optional parameter to be included.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D87457

Files:
  llvm/include/llvm/Analysis/TargetTransformInfo.h
  llvm/include/llvm/Analysis/TargetTransformInfoImpl.h
  llvm/lib/Analysis/TargetTransformInfo.cpp
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h
  llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
  llvm/lib/Target/ARM/ARMTargetTransformInfo.h
  llvm/lib/Target/Lanai/LanaiTargetTransformInfo.h
  llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
  llvm/lib/Target/PowerPC/PPCTargetTransformInfo.h
  llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
  llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
  llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp
  llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.h
  llvm/lib/Target/X86/X86TargetTransformInfo.cpp
  llvm/lib/Target/X86/X86TargetTransformInfo.h
  llvm/lib/Transforms/Scalar/ConstantHoisting.cpp
  llvm/test/CodeGen/Thumb2/mve-satmul-loops.ll

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