Make widenable condition transparent for MemoryWriteTracking

Side effects of widenable condition intrinsic are modelled via
InaccessibleMemOnly, and there is no way to say that it isn't
really writing any memory. This patch teaches MemoryWriteTracking
ignore this intrinsic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354021 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed