GlobalISel: merge invoke and call translation paths.

Well, sort of. But the lower-level code that invoke used to be using completely
botched the handling of varargs functions, which hopefully won't be possible if
they're using the same code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@293670 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed