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| author | Dan Gohman <gohman@apple.com> | 2010-04-14 16:08:56 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2010-04-14 16:08:56 +0000 |
| commit | 2c93e390723a17b97b59c3a0f6b4989767b7d86a (patch) | |
| tree | ac455eb0d5a0c76a89b7abbfc7583a02a259e3b3 /lib/Analysis/ScalarEvolution.cpp | |
| parent | 5861142dad77d0a6dc048e817c4c6c79f2d9383b (diff) | |
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101248 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/ScalarEvolution.cpp')
| -rw-r--r-- | lib/Analysis/ScalarEvolution.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp index a9a444f93a..b8bcdd4165 100644 --- a/lib/Analysis/ScalarEvolution.cpp +++ b/lib/Analysis/ScalarEvolution.cpp @@ -4634,6 +4634,8 @@ ScalarEvolution::HowFarToNonZero(const SCEV *V, const Loop *L) { /// getLoopPredecessor - If the given loop's header has exactly one unique /// predecessor outside the loop, return it. Otherwise return null. +/// This is less strict that the loop "preheader" concept, which requires +/// the predecessor to have only one single successor. /// BasicBlock *ScalarEvolution::getLoopPredecessor(const Loop *L) { BasicBlock *Header = L->getHeader(); |