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| author | Devang Patel <dpatel@apple.com> | 2007-07-31 16:52:25 +0000 |
|---|---|---|
| committer | Devang Patel <dpatel@apple.com> | 2007-07-31 16:52:25 +0000 |
| commit | b6858aea637fc46db1836f9145ce9d528005b3b4 (patch) | |
| tree | bd035d7553d4d27eff3df9b48e3e92c20ef79b65 | |
| parent | 2039e7d90563a78f80bd31615308a10051e8335b (diff) | |
| download | external_llvm-b6858aea637fc46db1836f9145ce9d528005b3b4.zip external_llvm-b6858aea637fc46db1836f9145ce9d528005b3b4.tar.gz external_llvm-b6858aea637fc46db1836f9145ce9d528005b3b4.tar.bz2 | |
Add note.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40638 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Transforms/Scalar/LICM.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/LICM.cpp b/lib/Transforms/Scalar/LICM.cpp index 669afa3..ede3bd9 100644 --- a/lib/Transforms/Scalar/LICM.cpp +++ b/lib/Transforms/Scalar/LICM.cpp @@ -218,7 +218,9 @@ namespace { LoopPass *llvm::createLICMPass() { return new LICM(); } -/// Hoist expressions out of the specified loop... +/// Hoist expressions out of the specified loop. Note, alias info for inner +/// loop is not preserved so it is not a good idea to run LICM multiple +/// times on one loop. /// bool LICM::runOnLoop(Loop *L, LPPassManager &LPM) { Changed = false; |