[PATCH] D28961: [SLP] Fix for PR31690: Allow using of non-zero initial values in horizontal instructions.

[Alexey Bataev via Phabricator via llvm-commits]

ABataev created this revision.

Currently, LLVM supports vectorization of horizontal reduction instructions with initial value set to 0. Patch supports vectorization of reduction with non-zero initial values. Also, it supports a vectorization of instructions with some extra arguments, like:

  float f(float x[], int a, int b) {
    float p = a % b;
    p += x[0] + 3;
    for (int i = 1; i < 32; i++)
      p += x[i];
    return p;
  }

Patch allows vectorization of this kind of horizontal reductions.


https://reviews.llvm.org/D28961

Files:
  lib/Transforms/Vectorize/SLPVectorizer.cpp
  test/Transforms/SLPVectorizer/X86/horizontal-list.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D28961.85161.patch
Type: text/x-patch
Size: 20216 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20170120/f7086e7c/attachment.bin>