diff options
Diffstat (limited to 'lib/Transforms/Utils/LCSSA.cpp')
| -rw-r--r-- | lib/Transforms/Utils/LCSSA.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Transforms/Utils/LCSSA.cpp b/lib/Transforms/Utils/LCSSA.cpp index 833dea5..38c1495 100644 --- a/lib/Transforms/Utils/LCSSA.cpp +++ b/lib/Transforms/Utils/LCSSA.cpp @@ -255,6 +255,11 @@ bool LCSSA::ProcessInstruction(Instruction *Inst, if (Loop *L = LI->getLoopFor(ExitBB)) SE->forgetLoop(L); } + + // If we added a PHI, drop the cache to avoid invalidating SCEV caches. + // FIXME: This is a big hammer, can we clear the cache more selectively? + if (SE && !AddedPHIs.empty()) + SE->forgetLoop(L); // Rewrite all uses outside the loop in terms of the new PHIs we just // inserted. |