[PGO] Remove redundant VP instrumentation

LLVM optimization passes may reduce a profiled target expression
to a constant. Removing runtime calls at such instrumentation points
would help speedup the runtime of the instrumented program.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@266229 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed