Reapply [InlineCost] Enable the cost benefit analysis on FDO
This patch enables the cost-benefit-analysis-based inliner by default
if we have instrumentation profile.
- SPEC CPU 2017 shows a 0.4% improvement.
- An internal large benchmark shows a 0.9% reduction in the cycle count along with 14.6% reduction in the number of call instructions executed.
Differential Revision: https://reviews.llvm.org/D98213