[all-commits] [llvm/llvm-project] d28857: [TTI][RISCV] Model cost of loading constants arms ...

[Philip Reames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d2885743630fcb35fdf64d21bd4bec62a5cb4d37
      https://github.com/llvm/llvm-project/commit/d2885743630fcb35fdf64d21bd4bec62a5cb4d37
  Author: Philip Reames <preames at rivosinc.com>
  Date:   2024-09-25 (Wed, 25 Sep 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/ARM/ARMTargetTransformInfo.cpp
    M llvm/lib/Target/ARM/ARMTargetTransformInfo.h
    M llvm/lib/Target/BPF/BPFTargetTransformInfo.h
    M llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.cpp
    M llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.h
    M llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
    M llvm/lib/Target/PowerPC/PPCTargetTransformInfo.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/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
    M llvm/test/Analysis/CostModel/RISCV/rvv-select.ll

  Log Message:
  -----------
  [TTI][RISCV] Model cost of loading constants arms of selects and compares (#109824)

This follows in the spirit of 7d82c99403f615f6236334e698720bf979959704,
and extends the costing API for compares and selects to provide
information about the operands passed in an analogous manner. This
allows us to model the cost of materializing the vector constant, as
some select-of-constants are significantly more expensive than others
when you account for the cost of materializing the constants involved.

This is a stepping stone towards fixing
https://github.com/llvm/llvm-project/issues/109466. A separate SLP patch
will be required to utilize the new API.



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