---
src/glsl/nir/nir.h | 3 +++
src/glsl/nir/nir_dominance.c | 9 ++++++++-
2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/src/glsl/nir/nir.h b/src/glsl/nir/nir.h
index 32c991a..8e5e686 100644
--- a/src/glsl/nir/nir.h
+++ b/src/glsl/nir/nir.h
@@ -1136,6 +1136,9 @@ typedef struct nir_block {
*/
struct nir_block *imm_dom;
+ /* This block's depth in the dominator tree; zero for the start block */
+ unsigned dom_depth;
+
/* This node's children in the dominance tree */
unsigned num_dom_children;
struct nir_block **dom_children;
diff --git a/src/glsl/nir/nir_dominance.c b/src/glsl/nir/nir_dominance.c
index 67fdcc6..898b139 100644
--- a/src/glsl/nir/nir_dominance.c
+++ b/src/glsl/nir/nir_dominance.c
@@ -131,6 +131,9 @@ calc_dom_frontier_cb(nir_block *block, void *state)
* 3. For each node, add itself to its parent's list of children, using
* num_dom_children as an index - at the end of this step, num_dom_children
* for each node will be the same as it was at the end of step #1.
+ *
+ * While we're at it, this is also a convenient time to set the
+ * dominator depth for each node.
*/
static bool
@@ -161,8 +164,12 @@ block_add_child(nir_block *block, void *state)
{
(void) state;
- if (block->imm_dom)
+ if (block->imm_dom) {
block->imm_dom->dom_children[block->imm_dom->num_dom_children++] = block;
+ block->dom_depth = block->imm_dom->dom_depth + 1;
+ } else {
+ block->dom_depth = 0;
+ }
return true;
}
--
2.2.2
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