[PATCH] D35754: [ForwardOpTree] Introduce the -polly-optree pass.

[Michael Kruse via Phabricator via llvm-commits]

Meinersbur created this revision.
Meinersbur added a project: Polly.
Herald added a subscriber: mgorny.
Herald added a reviewer: bollu.

This pass 'forwards' operand trees into statements that use them in order to avoid scalar dependencies.

This minimal implementation handles only the case of speculatable instructions. We will successively add support for:

- Hoisted loads
- Read-only values
- Synthesizable values
- Loads
- PHIs
- Forwarding only parts of the tree


https://reviews.llvm.org/D35754

Files:
  include/polly/ForwardOpTree.h
  include/polly/ScopInfo.h
  lib/CMakeLists.txt
  lib/Support/RegisterPasses.cpp
  lib/Transform/ForwardOpTree.cpp
  test/ForwardOpTree/forward_instruction.ll
  test/ForwardOpTree/forward_transitive.ll
  test/ForwardOpTree/noforward_partial.ll
  test/ForwardOpTree/noforward_phi.ll
  test/ForwardOpTree/noforward_region.ll
  test/ForwardOpTree/noforward_sideffects.ll
  test/ForwardOpTree/noforward_synthesizable.ll

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