[CFLAA] Recognize builtin allocation functions.

This patch extends CFLAA to recognize allocation functions such as
malloc, free, etc, so we can treat them more aggressively.

Patch by Jia Chen.

Differential Revision: http://reviews.llvm.org/D20776


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271421 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed