[LTO][AllocToken] Support AllocToken instrumentation in backend#169358

melver wants to merge 9 commits intomainllvm/llvm-project:mainfrom

users/melver/spr/lto-support-enabling-alloctoken-instrumentation-in-backendllvm/llvm-project:users/melver/spr/lto-support-enabling-alloctoken-instrumentation-in-backendCopy head branch name to clipboard