diff options
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LoopUnswitch.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/LoopUnswitch.cpp b/llvm/lib/Transforms/Scalar/LoopUnswitch.cpp index 7ad3bd626c1..b79791890da 100644 --- a/llvm/lib/Transforms/Scalar/LoopUnswitch.cpp +++ b/llvm/lib/Transforms/Scalar/LoopUnswitch.cpp @@ -128,6 +128,13 @@ LoopPass *llvm::createLoopUnswitchPass(bool Os) { static Value *FindLIVLoopCondition(Value *Cond, Loop *L, bool &Changed) { // Constants should be folded, not unswitched on! if (isa<Constant>(Cond)) return false; + + // If cond is not in loop then it is not suitable. + if (Instruction *I = dyn_cast<Instruction>(Cond)) + if (!L->contains(I->getParent())) + return 0; + if (isa<Argument>(Cond)) + return 0; // TODO: Handle: br (VARIANT|INVARIANT). // TODO: Hoist simple expressions out of loops. |
