Make Function::getInstructionCount const

Summary: Function::getInstructionCount can be const.

Reviewers: davidxl, paquette

Reviewed By: davidxl

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D53378

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@344754 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed