[yaml2obj][ELF] Just let this class own its buffer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184456 91177308-0d34-0410-b5e6-96231b3b80d8
[yaml2obj][ELF] Start factoring into "single point of truth".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184457 91177308-0d34-0410-b5e6-96231b3b80d8
Remove the simplify-libcalls pass (finally)

This commit completely removes what is left of the simplify-libcalls
pass.  All of the functionality has now been migrated to the instcombine
and functionattrs passes.  The following C API functions are now NOPs:

  1. LLVMAddSimplifyLibCallsPass
  2. LLVMPassManagerBuilderSetDisableSimplifyLibCalls

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184459 91177308-0d34-0410-b5e6-96231b3b80d8
Use a raw_fd_ostream instead of a std::ofstream.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184460 91177308-0d34-0410-b5e6-96231b3b80d8