diff options
| author | Chris Lattner <sabre@nondot.org> | 2009-11-01 18:42:03 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2009-11-01 18:42:03 +0000 |
| commit | c4775e4b973aaf6695dc00a3403b8b64f5257568 (patch) | |
| tree | 1f5f53a0faaa6679e85df2bf33c2a7a99085e3c2 /lib/Transforms/Scalar/SimplifyCFGPass.cpp | |
| parent | 280f3fedbfc8d76014dbb25aecfd57a847fd6183 (diff) | |
remove a bunch of locking from LLVMContextImpl. Since only one thread
can be banging on a context at a time, this isn't needed. Owen, please
review.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85728 91177308-0d34-0410-b5e6-96231b3b80d8
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 29712b3c13..6a8148040d 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); |