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nir/lower_shader_calls: Remat derefs before lowering resumes

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Closes: #7923
cc: mesa-stable

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20399>
This commit is contained in:
Konstantin Seurer 2022-12-20 18:26:34 +01:00 • committed by Marge Bot
parent af1bc7f4ce
commit 200e551cbb
1 changed files with 7 additions and 0 deletions
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7
src/compiler/nir/nir_lower_shader_calls.c
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@ -1184,6 +1184,13 @@ lower_resume(nir_shader *shader, int call_idx)
nir_function_impl *impl = nir_shader_get_entrypoint(shader);
nir_instr *resume_instr = find_resume_instr(impl, call_idx);
/* Deref chains contain metadata information that is needed by other passes
* after this one. If we don't rematerialize the derefs in the blocks where
* they're used here, the following lowerings will insert phis which can
* prevent other passes from chasing deref chains.
*/
nir_rematerialize_derefs_in_use_blocks_impl(impl);
if (duplicate_loop_bodies(impl, resume_instr)) {
nir_validate_shader(shader, "after duplicate_loop_bodies in "
"nir_lower_shader_calls");