On 10/16/14 15:33, Oleg Endo wrote:
Hi,
While working on some SH builtins I ran into the issue that the function
true_regnum in jump.c tries to access the reg_renumber array without
checking for nullptr. The particular use case here is using true_regnum
in a predicate that is invoked during builtin function expansion in the
TARGET_EXPAND_BUILTIN function. It seems that at that time reg_renumber
hasn't been initialized yet. Adding the nullptr check fixes the issue.
OK for trunk?
Cheers,
Oleg
gcc/ChangeLog:
* jump.c (true_regnum): Check that reg_renumber is not null
before accessing it.
You're not supposed to be using true_regnum prior to register
allocation. You're probably better off with a new predicate to handle
this case.
jeff
