On Tue, 2006-05-09 at 22:16, Richard Kenner wrote:
> Can there be two consecutive insns that use cc0 after cc0 is set?
>
> No.
Yes. But only very very late in the compilation, once all normal
re-ordering and optimization has been completed. I think it's probably
final that folds out
Can a jump_insn use cc0 but not actually jump? The following
instruction is found in the H8 port.
(jump_insn 18 17 20
(set (reg:HI 3 r3)
(eq:HI (cc0)
(const_int 0
A jump_insn is supposed to modify the PC. That one doesn't, so
Hi,
Can a jump_insn use cc0 but not actually jump? The following
instruction is found in the H8 port.
(jump_insn 18 17 20
(set (reg:HI 3 r3)
(eq:HI (cc0)
(const_int 0
Is there a requirement that every cc0 user must be a jump_insn?
Can there
BjÃrn Haase <[EMAIL PROTECTED]> writes:
> Imagine, you are having a clean md with a consistent "double set"
> representation for all the patterns that actually alter the condition code. I
> understood, that the problem for the optimization passes (e.g. combine) then
> shows up only for instruct
