[all-commits] [llvm/llvm-project] 791c9f: [Attributor] Fix TODO to avoid recomputation of re...

[Johannes Doerfert via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 791c9f1145f89d0ad8daddcc2207a8cdacbadaa0
      https://github.com/llvm/llvm-project/commit/791c9f1145f89d0ad8daddcc2207a8cdacbadaa0
  Author: Johannes Doerfert <johannes at jdoerfert.de>
  Date:   2020-01-29 (Wed, 29 Jan 2020)

  Changed paths:
    M llvm/include/llvm/Transforms/IPO/Attributor.h
    M llvm/lib/Transforms/IPO/Attributor.cpp

  Log Message:
  -----------
  [Attributor] Fix TODO to avoid recomputation of results

The helpers AAReturnedFromReturnedValues and
AACallSiteReturnedFromReturned are useful not only to avoid code
duplication but also to avoid recomputation of results. If we have N
call sites we should not recompute the function return information N
times but once. These are mostly straightforward usages with some minor
improvements on the helpers and addition of a new one
(IRPosition::getAssociatedType) that knows about function return types.