I have a question about spilling variables and alignment requirements. There is currently code that allows one to declare local variables with an alignment that is greater than MAX_STACK_ALIGNMENT. In that case expand_stack_vars calls allocate_dynamic_stack_space to create a pointer to properly aligned stack space. (There is actually a bug in this code, PR 65315, but I have submitted a patch.)
But there does not seem to be any way to do spills and fills into memory that has an alignment requirement greater than MAX_STACK_ALIGNMENT. Is that correct? I am looking at MIPS using the LRA allocator. I was hoping there was some way to spill 16 byte registers into a 16 byte aligned spill slot even if the MAX_STACK_ALIGNMENT is 8 bytes. I know x86 has some platform specific code to dynamically increase the stack alignment and I think that is how they handle this situation but I don't see any other platforms using that technique and I was wondering if there is any more generalized method for spilling registers to memory with an alignment requirement greater than MAX_STACK_ALIGNMENT. Steve Ellcey sell...@imgtec.com
