Fix AAResults::callCapturesBefore for operand bundles

Summary:
AAResults::callCapturesBefore would previously ignore operand
bundles. It was possible for a later instruction to miss its memory
dependency on a call site that would only access the pointer through a
bundle.

Patch by Oscar Blumberg!

Reviewers: sanjoy

Differential Revision: http://reviews.llvm.org/D21286

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272580 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed