[all-commits] [llvm/llvm-project] 206f10: Plumb InstructionCost through unroll costing

[Philip Reames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 206f10d3f6aa3fe4bf963675fe579e7554bad330
      https://github.com/llvm/llvm-project/commit/206f10d3f6aa3fe4bf963675fe579e7554bad330
  Author: Philip Reames <preames at rivosinc.com>
  Date:   2022-06-09 (Thu, 09 Jun 2022)

  Changed paths:
    M llvm/include/llvm/Transforms/Utils/UnrollLoop.h
    M llvm/lib/Frontend/OpenMP/OMPIRBuilder.cpp
    M llvm/lib/Transforms/Scalar/LoopUnrollAndJamPass.cpp
    M llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp
    A llvm/test/Transforms/LoopUnroll/RISCV/invalid-cost.ll

  Log Message:
  -----------
  Plumb InstructionCost through unroll costing

Teach the unroller(s) how to handle an invalid cost. This avoids crashes when the backend can't provide a cost due to either a fundemental limitation or an unimplemented cost model case.

Differential Revision: https://reviews.llvm.org/D127305