nir/cf: Make a helper function for removing a predecessor.

I need to do this in a second place, and I'd rather make a helper
function than cut and paste the code.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>

diff --git a/src/glsl/nir/nir_control_flow.c b/src/glsl/nir/nir_control_flow.c
index 768dfd2aff3018c5748d712ab7039a42e1aca722..43e4e43aeded6f50b0ecc8066cac0d29c8015464 100644 (file)
--- a/src/glsl/nir/nir_control_flow.c
+++ b/src/glsl/nir/nir_control_flow.c
@@ -60,6 +60,16 @@ block_add_pred(nir_block *block, nir_block *pred)
    _mesa_set_add(block->predecessors, pred);
 }
 
+static inline void
+block_remove_pred(nir_block *block, nir_block *pred)
+{
+   struct set_entry *entry = _mesa_set_search(block->predecessors, pred);
+
+   assert(entry);
+
+   _mesa_set_remove(block->predecessors, entry);
+}
+
 static void
 link_blocks(nir_block *pred, nir_block *succ1, nir_block *succ2)
 {
@@ -83,11 +93,7 @@ unlink_blocks(nir_block *pred, nir_block *succ)
       pred->successors[1] = NULL;
    }
 
-   struct set_entry *entry = _mesa_set_search(succ->predecessors, pred);
-
-   assert(entry);
-
-   _mesa_set_remove(succ->predecessors, entry);
+   block_remove_pred(succ, pred);
 }
 
 static void