fd24147338c1a44ed39fe2cd11391f49ddd94695 - platform_external_llvm80

commit	fd24147338c1a44ed39fe2cd11391f49ddd94695	[log] [tgz]
author	Vedant Kumar <vsk@apple.com>	Sun Nov 04 23:11:57 2018 +0000
committer	Vedant Kumar <vsk@apple.com>	Sun Nov 04 23:11:57 2018 +0000
tree	41281f388e8e8f6b93ce46c2c91b029ce2d94b58
parent	ad684cff05250ba330955b7eae9a8e7f965f5abf [diff]

[HotColdSplitting] Use TTI to inform outlining threshold

Using TargetTransformInfo allows the splitting pass to factor in the
code size cost of instructions as it decides whether or not outlining is
profitable.

This did not regress the overall amount of outlining seen on the handful
of internal frameworks I tested.

Thanks to Jun Bum Lim for suggesting this!

Differential Revision: https://reviews.llvm.org/D53835

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@346108 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/IPO/HotColdSplitting.cpp[diff]
test/Transforms/HotColdSplit/X86/lit.local.cfg[Added - diff]
test/Transforms/HotColdSplit/X86/outline-expensive.ll[Added - diff]
test/Transforms/HotColdSplit/do-not-split.ll[diff]
test/Transforms/HotColdSplit/minsize.ll[diff]
test/Transforms/HotColdSplit/split-out-dbg-val-of-arg.ll[diff]

6 files changed

tree: 41281f388e8e8f6b93ce46c2c91b029ce2d94b58