[PATCH] D23947: Use store operation to poison allocas for lifetime analysis.

[Vitaly Buka via llvm-commits]

vitalybuka created this revision.
vitalybuka added a reviewer: eugenis.
vitalybuka added a subscriber: llvm-commits.

Calling __asan_poison_stack_memory and __asan_unpoison_stack_memory for small
variables is too expensive.

Code is disabled by default and can be enabled by -asan-experimental-poisoning.

PR27453

https://reviews.llvm.org/D23947

Files:
  lib/Transforms/Instrumentation/AddressSanitizer.cpp
  test/Instrumentation/AddressSanitizer/stack-poisoning-experimental-be.ll
  test/Instrumentation/AddressSanitizer/stack-poisoning-experimental.ll

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