We can't preserve dominance or live variable information.
This also begs the question: what about globals? Metadata only exists
at the nir_function_impl level, so it would seem there is no metadata
about global variables for us to invalidate.
Signed-off-by: Kenneth Graunke <kenn...@whitecape.org>
---
src/glsl/nir/nir_remove_dead_variables.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/src/glsl/nir/nir_remove_dead_variables.c
b/src/glsl/nir/nir_remove_dead_variables.c
index d6783e7..77b6c13 100644
--- a/src/glsl/nir/nir_remove_dead_variables.c
+++ b/src/glsl/nir/nir_remove_dead_variables.c
@@ -126,8 +126,13 @@ nir_remove_dead_variables(nir_shader *shader)
progress = remove_dead_vars(&shader->globals, live) || progress;
nir_foreach_overload(shader, overload) {
- if (overload->impl)
- progress = remove_dead_vars(&overload->impl->locals, live) ||
progress;
+ if (overload->impl) {
+ if (remove_dead_vars(&overload->impl->locals, live)) {
+ nir_metadata_preserve(overload->impl, nir_metadata_block_index |
+ nir_metadata_dominance);
+ progress = true;
+ }
+ }
}
_mesa_set_destroy(live, NULL);
--
2.6.2
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