From: Eric Botcazou
Date: Sat, 17 Dec 2011 00:37:43 +0100
> 2011-12-16 Eric Botcazou
>
> * config/sparc/sparc.md (UNSPEC_FRAME_BLOCKAGE): New constant.
> (frame_blockage): New expander.
> (frame_blockage): New instruction.
> * config/sparc/sparc.c (sparc_expand_prologu
In regular mode (with register windows), the compiler can make use of three
sequences to establish the frame:
1. a single 'save' instruction taking an immediate as decrement,
2. a 'save' instruction taking an immediate followed by an 'add' instruction
taking another immediate as decrement,
3.
