[all-commits] [llvm/llvm-project] 6b9a70: Add front/back accessors to indexed_accessor_range.

[River Riddle via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 6b9a706200cbb27e5e863cfd41fb3684ee616e23
      https://github.com/llvm/llvm-project/commit/6b9a706200cbb27e5e863cfd41fb3684ee616e23
  Author: River Riddle <riddleriver at gmail.com>
  Date:   2020-06-29 (Mon, 29 Jun 2020)

  Changed paths:
    M llvm/include/llvm/ADT/STLExtras.h
    M mlir/test/lib/Dialect/Test/TestOps.td

  Log Message:
  -----------
  Add front/back accessors to indexed_accessor_range.

These map to the similar accessors on ArrayRef and other random access containers.

This fixes a compilation error on MLIR ODS for variadic operands/results, which relied on the availability of front in certain situations.