[PATCH 0/2] Fix reverse stepping multiple contiguous PC ranges over the line table.

[Carl Love via Gdb-patches <gdb-patches@sourceware.org>]

GDB maintainers:

Per recent discussions with Bruno on how gdb should behave when reverse
stepping from a function call to the previous line:

https://sourceware.org/pipermail/gdb-patches/2023-July/201035.html

I have updated the second patch in the series to address his comments. 
The current behavior of gdb when executing in reverse is gdb stops at
the call to a function, then a reverse-step or reverse-next stops at
the beginning of the same line instead of the previous line.  Bruno
pointed out that gdb on clang stops at the previous line not at the
beginning of the line.

The first patch in the series has not been changed.  I am reposting it
along with the second patch so it doesn't get lost.  

The patch series has been tested on Power10 LE and on X86-64.

                       Carl