It may have a minor effect on optimisation. Variables may now be in storage when they were optimized into registers. But this is likely to be less than 1% difference. You might want to use Jump instructions rather than Branch, so you do not have to worry about addressability Colin
On Mon, 1 May 2023 at 22:02, Phil Smith III <li...@akphs.com> wrote: > (Cross-posted to IBM-MAIN and the assembler list) > > When compiling C programs with XLC, you need to specify the -dasm flag to > have inline assembler code recognized as such. I can see PoE arguments for > requiring that option; what isn't clear is whether there's any downside to > it beyond the unlikely case that you decide to have a function of your own > named asm or __asm or __asm__. Is there? We'd rather just use it all the > time, rather than trying to keep track of which modules have inline > assembler and which don't, but not if it's going to cost significant > performance at compile time or something. >
