[all-commits] [llvm/llvm-project] 0ad6be: [SLPVectorizer, TargetTransformInfo, SystemZ] Imp...

[Jonas Paulsson via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0ad6be1927f89cef09aa5d0fb244873f687997c9
      https://github.com/llvm/llvm-project/commit/0ad6be1927f89cef09aa5d0fb244873f687997c9
  Author: Jonas Paulsson <paulson1 at linux.ibm.com>
  Date:   2024-11-29 (Fri, 29 Nov 2024)

  Changed paths:
    M llvm/include/llvm/Analysis/TargetTransformInfo.h
    M llvm/include/llvm/Analysis/TargetTransformInfoImpl.h
    M llvm/include/llvm/CodeGen/BasicTTIImpl.h
    M llvm/lib/Analysis/TargetTransformInfo.cpp
    M llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
    M llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h
    M llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
    M llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
    M llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp
    M llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.h
    M llvm/lib/Target/X86/X86TargetTransformInfo.cpp
    M llvm/lib/Target/X86/X86TargetTransformInfo.h
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/SystemZ/vec-elt-insertion.ll

  Log Message:
  -----------
  [SLPVectorizer, TargetTransformInfo, SystemZ]  Improve SLP getGatherCost(). (#112491)

As vector element loads are free on SystemZ, this patch improves the cost
computation in getGatherCost() to reflect this.

getScalarizationOverhead() gets an optional parameter which can hold the actual
Values so that they in turn can be passed (by BasicTTIImpl) to
getVectorInstrCost().

SystemZTTIImpl::getVectorInstrCost() will now recognize a LoadInst and
typically return a 0 cost for it, with some exceptions.



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