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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198653 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2014-01-07 01:02:52 +00:00
parent 063564c4c5
commit f86063e7ec
1 changed files with 2 additions and 2 deletions
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4
lib/Transforms/Scalar/IndVarSimplify.cpp
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@ -1827,8 +1827,8 @@ bool IndVarSimplify::runOnLoop(Loop *L, LPPassManager &LPM) {
// Check preconditions for proper SCEVExpander operation. SCEV does not
// express SCEVExpander's dependencies, such as LoopSimplify. Instead any
// pass that uses the SCEVExpander must do it. This does not work well for
// loop passes because SCEVExpander makes assumptions about all loops, while
// LoopPassManager only forces the current loop to be simplified.
// loop passes because SCEVExpander makes assumptions about all loops,
// while LoopPassManager only forces the current loop to be simplified.
//
// FIXME: SCEV expansion has no way to bail out, so the caller must
// explicitly check any assumptions made by SCEV. Brittle.