[all-commits] [llvm/llvm-project] efaf30: [LV] Print remark when loop cannot be vectorized d...

[sdesmalen-arm via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: efaf3099c8cec1954831ee28a2f75a72096f50eb
      https://github.com/llvm/llvm-project/commit/efaf3099c8cec1954831ee28a2f75a72096f50eb
  Author: Sander de Smalen <sander.desmalen at arm.com>
  Date:   2021-07-14 (Wed, 14 Jul 2021)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/test/Transforms/LoopVectorize/AArch64/scalable-call.ll

  Log Message:
  -----------
  [LV] Print remark when loop cannot be vectorized due to invalid costs.

This patch emits remarks for instructions that have invalid costs for
a given set of vectorization factors. Some example output:

  t.c:4:19: remark: Instruction with invalid costs prevented vectorization at VF=(vscale x 1): load
      dst[i] = sinf(src[i]);
                    ^
  t.c:4:14: remark: Instruction with invalid costs prevented vectorization at VF=(vscale x 1, vscale x 2, vscale x 4): call to llvm.sin.f32
      dst[i] = sinf(src[i]);
               ^
  t.c:4:12: remark: Instruction with invalid costs prevented vectorization at VF=(vscale x 1): store
      dst[i] = sinf(src[i]);
             ^

Reviewed By: fhahn, kmclaughlin

Differential Revision: https://reviews.llvm.org/D105806