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Diffstat (limited to 'lib/Transforms/Scalar/SimplifyCFGPass.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/SimplifyCFGPass.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/SimplifyCFGPass.cpp b/lib/Transforms/Scalar/SimplifyCFGPass.cpp index 29712b3..6a81480 100644 --- a/lib/Transforms/Scalar/SimplifyCFGPass.cpp +++ b/lib/Transforms/Scalar/SimplifyCFGPass.cpp @@ -126,6 +126,9 @@ static bool MarkAliveBlocks(BasicBlock *BB, } } + // Store to undef and store to null are undefined and used to signal that + // they should be changed to unreachable by passes that can't modify the + // CFG. if (StoreInst *SI = dyn_cast<StoreInst>(BBI)) { Value *Ptr = SI->getOperand(1); |
