The first row of a pyramid can have a larger location delta than the
following, because there can be other things than a push between the
function entry point and the first push
clang generates tables like this
LOC CFA rbx rbp r14 r15 ra
00000000000028a0 rsp+8 u u u u c-8
00000000000028a1 rsp+16 u u u u c-8
00000000000028a3 rsp+24 u u u u c-8
00000000000028a5 rsp+32 u u u u c-8
00000000000028a6 rsp+40 u u u u c-8
00000000000028aa rsp+64 c-40 c-16 c-32 c-24 c-8
Once rbp has been set in the DWARF, if this flag is set, nothing will
remove it from the table. This mimicks gcc and allows us to check easily
our tables against theirs.
