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| author | Devang Patel <dpatel@apple.com> | 2008-09-04 22:43:59 +0000 |
|---|---|---|
| committer | Devang Patel <dpatel@apple.com> | 2008-09-04 22:43:59 +0000 |
| commit | deafefabae915cf20884fd829d2542f9626786e8 (patch) | |
| tree | 2e32690fdbb487ee601c0e6900664987cc963233 /lib/Transforms | |
| parent | fe89669b772ac6aeb7b8e5b0e3c5e801e46598c7 (diff) | |
| download | llvm-deafefabae915cf20884fd829d2542f9626786e8.tar.gz llvm-deafefabae915cf20884fd829d2542f9626786e8.tar.bz2 llvm-deafefabae915cf20884fd829d2542f9626786e8.tar.xz | |
A loop may be unswitched multiple times. Reconstruct dom info. at the end.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55806 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/Scalar/LoopUnswitch.cpp | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/lib/Transforms/Scalar/LoopUnswitch.cpp b/lib/Transforms/Scalar/LoopUnswitch.cpp index 691a67a427..1c4bba295b 100644 --- a/lib/Transforms/Scalar/LoopUnswitch.cpp +++ b/lib/Transforms/Scalar/LoopUnswitch.cpp @@ -190,6 +190,7 @@ bool LoopUnswitch::runOnLoop(Loop *L, LPPassManager &LPM_Ref) { DF = getAnalysisToUpdate<DominanceFrontier>(); DT = getAnalysisToUpdate<DominatorTree>(); currentLoop = L; + Function *F = currentLoop->getHeader()->getParent(); bool Changed = false; do { assert(currentLoop->isLCSSAForm()); @@ -197,6 +198,13 @@ bool LoopUnswitch::runOnLoop(Loop *L, LPPassManager &LPM_Ref) { Changed |= processCurrentLoop(); } while(redoLoop); + if (Changed) { + // FIXME: Reconstruct dom info, because it is not preserved properly. + if (DT) + DT->runOnFunction(*F); + if (DF) + DF->runOnFunction(*F); + } return Changed; } @@ -450,11 +458,6 @@ bool LoopUnswitch::UnswitchIfProfitable(Value *LoopCond, Constant *Val){ UnswitchNontrivialCondition(LoopCond, Val, currentLoop); } - // FIXME: Reconstruct dom info, because it is not preserved properly. - if (DT) - DT->runOnFunction(*F); - if (DF) - DF->runOnFunction(*F); return true; } |