Encode argument numbering in debug info so that code generator can emit them in order.
This fixes few blocks.exp regressions.

Reapply r126795 with a fix (one character change) for gdb testsuite regressions.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126858 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed