Re: [SPARC] Add support for overflow arithmetic

2016-10-28 Thread Jakub Jelinek
On Fri, Oct 28, 2016 at 07:27:56PM +0200, Eric Botcazou wrote: > Thanks for the hint. The hook is the way to go I think because BITS_PER_WORD > is not a constant, so the default would not be properly initialized. Here's > a > tentative patch, I'll add a couple of SPARC-specific testcases if ac

Re: [SPARC] Add support for overflow arithmetic

2016-10-28 Thread Eric Botcazou
> Then to some extent defining WORD_REGISTER_OPERATIONS on SPARC is a lie, > it only has "INT_REGISTER_OPERATIONS", i.e. all operations smaller than > int are performed on the whole register, int operations can be really done > in SImode in the IL (no need to sign/zero extend anything to DImode, if

Re: [SPARC] Add support for overflow arithmetic

2016-10-21 Thread Jakub Jelinek
On Fri, Oct 21, 2016 at 11:18:31AM +0200, Eric Botcazou wrote: > /* For sub-word operations, if target doesn't have them, start >with precres widening right away, otherwise do it only >if the most simple cases can't be used. */ > if (WORD_REGISTER_OPERATIONS > &