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| author | Jingyue Wu <jingyue@google.com> | 2014-09-01 03:47:25 +0000 |
|---|---|---|
| committer | Jingyue Wu <jingyue@google.com> | 2014-09-01 03:47:25 +0000 |
| commit | 5208cc5dbed7b179fb9fa2f2619a604ef4117136 (patch) | |
| tree | 6bd80f646211ce3406d0babdf047bf1f24d0b0a5 /llvm/lib/Transforms/Vectorize/LoopVectorize.cpp | |
| parent | 6a150a87ef7d7d546b34ab0b7fe58729da1d6c3e (diff) | |
| download | bcm5719-llvm-5208cc5dbed7b179fb9fa2f2619a604ef4117136.tar.gz bcm5719-llvm-5208cc5dbed7b179fb9fa2f2619a604ef4117136.zip | |
[MachineSink] Use the real post dominator tree
Summary:
Fixes a FIXME in MachineSinking. Instead of using the simple heuristics
in isPostDominatedBy, use the real MachinePostDominatorTree. The old
heuristics caused instructions to sink unnecessarily, and might create
register pressure.
Test Plan:
Added a NVPTX codegen test to verify that our change is in effect. It also
shows the unnecessary register pressure caused by over-sinking. Updated
affected tests in AArch64 and X86.
Reviewers: eliben, meheff, Jiangning
Reviewed By: Jiangning
Subscribers: jholewinski, aemerson, mcrosier, llvm-commits
Differential Revision: http://reviews.llvm.org/D4814
llvm-svn: 216862
Diffstat (limited to 'llvm/lib/Transforms/Vectorize/LoopVectorize.cpp')
0 files changed, 0 insertions, 0 deletions
