[PATCH] D59922: [Attributor] Deduce "no-capture" argument attribute

[Johannes Doerfert via Phabricator via llvm-commits]

jdoerfert created this revision.
jdoerfert added reviewers: homerdin, hfinkel, fedor.sergeev, sanjoy, spatel, nlopes, nicholas, reames.
Herald added subscribers: cfe-commits, bollu, hiraditya.
Herald added projects: clang, LLVM.

Add the no-capture argument attribute deduction to the Attributor
fixpoint framework.

The new string attributed "no-capture-maybe-returned" is introduced to
allow deduction of no-capture through functions that "capture" an
argument but only by "returning" it.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D59922

Files:
  clang/test/CodeGenObjC/os_log.m
  clang/test/CodeGenOpenCL/as_type.cl
  llvm/include/llvm/Transforms/IPO/Attributor.h
  llvm/lib/Transforms/IPO/Attributor.cpp
  llvm/test/Transforms/FunctionAttrs/2009-01-02-LocalStores.ll
  llvm/test/Transforms/FunctionAttrs/SCC1.ll
  llvm/test/Transforms/FunctionAttrs/arg_nocapture.ll
  llvm/test/Transforms/FunctionAttrs/arg_returned.ll
  llvm/test/Transforms/FunctionAttrs/incompatible_fn_attrs.ll
  llvm/test/Transforms/FunctionAttrs/nocapture.ll
  llvm/test/Transforms/FunctionAttrs/readattrs.ll

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