diff options
Diffstat (limited to 'llvm/lib/Transforms/Utils/LCSSA.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/LCSSA.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Utils/LCSSA.cpp b/llvm/lib/Transforms/Utils/LCSSA.cpp index 53d444b..eeeaadc 100644 --- a/llvm/lib/Transforms/Utils/LCSSA.cpp +++ b/llvm/lib/Transforms/Utils/LCSSA.cpp @@ -325,6 +325,10 @@ bool llvm::formLCSSA(Loop &L, DominatorTree &DT, LoopInfo *LI, // Look at all the instructions in the loop, checking to see if they have uses // outside the loop. If so, put them into the worklist to rewrite those uses. for (BasicBlock *BB : BlocksDominatingExits) { + // Skip blocks that are part of any sub-loops, they must be in LCSSA + // already. + if (LI->getLoopFor(BB) != &L) + continue; for (Instruction &I : *BB) { // Reject two common cases fast: instructions with no uses (like stores) // and instructions with one use that is in the same block as this. |