commit 09ab8e6ad9440d15f3083a44ca0c1ab3ae84a036
author bbudge <bbudge@chromium.org> Wed Oct 26 16:04:11 2016
committer Commit bot <commit-bot@chromium.org> Wed Oct 26 16:04:33 2016
tree 577504c5cf75c38f0674e890415e02077c364f92
parent f6c3fd0a7402234dc444141e35840480292ac4cf

[Turbofan] Add concept of FP register aliasing on ARM 32.

- Modifies RegisterConfiguration to specify complex aliasing on ARM 32.
- Modifies RegisterAllocator to consider aliasing.
- Modifies ParallelMove::PrepareInsertAfter to handle aliasing.
- Modifies GapResolver to split wider register moves when interference
with smaller moves is detected.
- Modifies MoveOptimizer to handle aliasing.
- Adds ARM 32 macro-assembler pseudo move instructions to handle cases where
  split moves don't correspond to actual s-registers.
- Modifies CodeGenerator::AssembleMove and AssembleSwap to handle moves of
  different widths, and moves involving pseudo-s-registers.
- Adds unit tests for FP operand interference checking and PrepareInsertAfter.
- Adds more tests of FP for the move optimizer and register allocator.

LOG=N
BUG=v8:4124

Review-Url: https://codereview.chromium.org/2410673002
Cr-Commit-Position: refs/heads/master@{#40597}