[all-commits] [llvm/llvm-project] b57401: [BitcodeReader] Fix DelayedShuffle handling for Co...

[Eli Friedman via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: b5740105d270a2d76da8812cafb63e4b799ada73
      https://github.com/llvm/llvm-project/commit/b5740105d270a2d76da8812cafb63e4b799ada73
  Author: Eli Friedman <efriedma at quicinc.com>
  Date:   2020-06-23 (Tue, 23 Jun 2020)

  Changed paths:
    M llvm/lib/Bitcode/Reader/BitcodeReader.cpp
    A llvm/test/Bitcode/vscale-shuffle.ll

  Log Message:
  -----------
  [BitcodeReader] Fix DelayedShuffle handling for ConstantExpr shuffles.

The indexing was messed up, so the result was completely broken.

Shuffle constant exprs are rare in practice; without vscale types,
constant folding generally elminates them. So sort of hard to trip over.

Fixes regression from D72467.

Differential Revision: https://reviews.llvm.org/D80330