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i965: Don't try copy propagation if constant propagation succeeded.

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It cannot get any better.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Francisco Jerez 2016-02-26 17:28:03 -08:00
parent dcf5e19e65
commit c70b7c80e3
2 changed files with 2 additions and 4 deletions
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3
src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
View file

@ -737,8 +737,7 @@ fs_visitor::opt_copy_propagate_local(void *copy_prop_ctx, bblock_t *block,
foreach_in_list(acp_entry, entry, &acp[inst->src[i].nr % ACP_HASH_SIZE]) {
if (try_constant_propagate(inst, entry))
progress = true;
if (try_copy_propagate(inst, i, entry))
else if (try_copy_propagate(inst, i, entry))
progress = true;
}
}

3
src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp
View file

@ -453,8 +453,7 @@ vec4_visitor::opt_copy_propagation(bool do_constant_prop)
if (do_constant_prop && try_constant_propagate(devinfo, inst, i, &entry))
progress = true;
if (try_copy_propagate(devinfo, inst, i, &entry, attributes_per_reg))
else if (try_copy_propagate(devinfo, inst, i, &entry, attributes_per_reg))
progress = true;
}