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| author | Matthias Braun <matze@braunis.de> | 2017-06-12 20:30:52 +0000 |
|---|---|---|
| committer | Matthias Braun <matze@braunis.de> | 2017-06-12 20:30:52 +0000 |
| commit | 76f063090b2822106f0ff1fc951cae8e8821614f (patch) | |
| tree | 7b03014c10dcc01e1b4f9264c106a6bff6c77fea /llvm/lib/CodeGen/SplitKit.cpp | |
| parent | 89061b2224456b46fb09a62533687dd3bf746afa (diff) | |
| download | bcm5719-llvm-76f063090b2822106f0ff1fc951cae8e8821614f.tar.gz bcm5719-llvm-76f063090b2822106f0ff1fc951cae8e8821614f.zip | |
SplitKit: Fix partially live subreg splitting
Fix thinko/typo in subreg aware liverange splitting logic. I'm not sure
how to write a proper testcase for this. The original problem only
happens on an out-of-tree target. Forcing subreg enabled targets to
spill and split in a predictable way is near impossible.
llvm-svn: 305228
Diffstat (limited to 'llvm/lib/CodeGen/SplitKit.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SplitKit.cpp | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/SplitKit.cpp b/llvm/lib/CodeGen/SplitKit.cpp index 3a50aaa6998..008b984dd96 100644 --- a/llvm/lib/CodeGen/SplitKit.cpp +++ b/llvm/lib/CodeGen/SplitKit.cpp @@ -569,8 +569,7 @@ SlotIndex SplitEditor::buildCopy(unsigned FromReg, unsigned ToReg, // Greedy heuristic: Keep iterating keeping the best covering subreg index // each time. - LaneBitmask LanesLeft = - LaneMask & ~(TRI.getSubRegIndexLaneMask(BestCover)); + LaneBitmask LanesLeft = LaneMask & ~(TRI.getSubRegIndexLaneMask(BestIdx)); while (LanesLeft.any()) { unsigned BestIdx = 0; int BestCover = INT_MIN; |
