On 14/10/17 11:42, Claudio Eterno wrote: > I've some doubts on this: > > "stack-based architectures are difficult to accommodate as well" > > Can someone explain better this? > If I remember well the C uses the stack for local variable storage, > does he refer to those architectures which are completely stack > oriented (GPR not present)? This isn't about stack frames. This is about machines such as the Burroughs B-5500 and its descendants (e.g. Novix) which use zero-operand instructions. These take operands from the stack and return the results there. GCC assumes that instructions use registers for source and destination operands. (Usually, anyway.) It would be possible to write a pass which turned register-register operations into stack code, but maybe the code quality wouldn't be great. -- Andrew Haley Java Platform Lead Engineer Red Hat UK Ltd. <https://www.redhat.com> EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671
