[PGO] IR level instrumentation of indirect call value profiling

This patch adds the instrumentation for indirect call value profiling. It finds all the indirect call-sites and generates instrprof_value_profile intrinsic calls. A new opt level option -disable-vp is introduced to disable this instrumentation.

Reviewers: davidxl, betulb, vsk

Differential Revision: http://reviews.llvm.org/D16016


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@258417 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed