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pco: temporarily don't propagate pixout accesses in opt

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Signed-off-by: Simon Perretta <simon.perretta@imgtec.com>
Acked-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36412>
This commit is contained in:
Simon Perretta 2025-05-28 22:39:20 +01:00 • committed by Marge Bot
parent a67120cda3
commit 664ab228da
1 changed files with 15 additions and 0 deletions
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15
src/imagination/pco/pco_opt.c
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@ -260,6 +260,8 @@ static inline bool try_back_prop_instr(struct pco_use *uses, pco_instr *instr)
if (pco_ref_is_reg(*pdest_from) &&
pco_ref_get_reg_class(*pdest_from) == PCO_REG_CLASS_PIXOUT) {
return false;
bool has_isp_fb = false;
pco_foreach_instr_in_func_from_rev (rev_instr, use->instr) {
@ -274,6 +276,14 @@ static inline bool try_back_prop_instr(struct pco_use *uses, pco_instr *instr)
if (has_isp_fb)
return false;
/* Don't move pixout regs into instructions that already use them. */
pco_foreach_instr_src (psrc, instr) {
if (pco_ref_is_reg(*psrc) &&
pco_ref_get_reg_class(*psrc) == PCO_REG_CLASS_PIXOUT) {
return false;
}
}
}
assert(pco_ref_get_bits(*pdest_from) == pco_ref_get_bits(*pdest_to));
@ -373,6 +383,11 @@ static inline bool can_fwd_prop_src(const pco_instr *to_instr,
* feature/arch-agnostic.
*/
if (pco_ref_is_reg(*from) &&
pco_ref_get_reg_class(*from) == PCO_REG_CLASS_PIXOUT) {
return false;
}
return true;
}