Avoid undefined behaviour in m68hc11 md_begin
Given p = A where p is a pointer to some type and A is an array of
that type, then the expression p - 1 + 1 evokes undefined behaviour
according to the C standard.
gcc-13 -fsanitize=address,undefined complains about this, but not
where the undefined behaviour actually occurs at tc-m68hc11.c:646.
Instead you get an error: "tc-m68hc11.c:708:20: runtime error: store
to address 0x62600000016c with insufficient space for an object of
type 'int'". Which is a lie. There most definitely is space there.
Oh well, diagnostics are sometimes hard to get right. The UB is easy
to avoid.
PR 30279
* config/tc-m68hc11.c (md_begin): Avoid undefined pointer
decrement. Remove unnecessary cast.
1 file changed
