[all-commits] [llvm/llvm-project] 855ec5: [mlir] Model StringRef in C API

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  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 855ec517a300daee6acb48474b6d3304c0914c60
      https://github.com/llvm/llvm-project/commit/855ec517a300daee6acb48474b6d3304c0914c60
  Author: Alex Zinenko <zinenko at google.com>
  Date:   2020-09-16 (Wed, 16 Sep 2020)

  Changed paths:
    M mlir/docs/CAPI.md
    M mlir/include/mlir-c/StandardAttributes.h
    A mlir/include/mlir-c/Support.h
    A mlir/include/mlir/CAPI/Support.h
    M mlir/lib/Bindings/Python/IRModules.cpp
    M mlir/lib/CAPI/IR/CMakeLists.txt
    M mlir/lib/CAPI/IR/StandardAttributes.cpp
    A mlir/lib/CAPI/IR/Support.cpp
    M mlir/test/CAPI/ir.c

  Log Message:
  -----------
  [mlir] Model StringRef in C API

Numerous MLIR functions return instances of `StringRef` to refer to a
non-owning fragment of a string (usually owned by the context). This is a
relatively simple class that is defined in LLVM. Provide a simple wrapper in
the MLIR C API that contains the pointer and length of the string fragment and
use it for Standard attribute functions that return StringRef instead of the
previous, callback-based mechanism.

Reviewed By: stellaraccident

Differential Revision: https://reviews.llvm.org/D87677