Unpoison stack memory in use-after-return + use-after-scope mode

Summary:
We still want to unpoison full stack even in use-after-return as it can be disabled at runtime.

PR27453

Reviewers: eugenis, kcc

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D21202

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272334 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed