On Mon, 8 Dec 2014, Segher Boessenkool wrote: > A lot of old user code clobbers the carry bit without telling the compiler > about it. This used to just work, because the compiler never used the bit > outside of a single RTL instruction. But that will change. Let's clobber > the carry bit in every asm; this isn't very expensive.
There's also the option of clobbering it only if it's not explicitly mentioned in the asm, say with a singleton regclass, see cris_md_asm_clobbers. brgds, H-P
