[asan] Avoid lifetime analysis for allocas with can be in ambiguous state
Summary:
C allows to jump over variables declaration so lifetime.start can be
avoid before variable usage. To avoid false-positives on such rare cases
we detect them and remove from lifetime analysis.
PR27453
PR28267
Reviewers: eugenis
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D24321
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@280907 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed