[Mesa-dev] [PATCH 1/3] nir: add nir_instr_is_first() and nir_instr_is_last() helpers

[Kenneth Graunke]

From: Connor Abbott <connor.w.abbott at intel.com>

Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/glsl/nir/nir.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/glsl/nir/nir.h b/src/glsl/nir/nir.h
index e9a506c..0db1fc3 100644
--- a/src/glsl/nir/nir.h
+++ b/src/glsl/nir/nir.h
@@ -443,6 +443,18 @@ nir_instr_prev(nir_instr *instr)
       return exec_node_data(nir_instr, prev, node);
 }
 
+static inline bool
+nir_instr_is_first(nir_instr *instr)
+{
+   return exec_node_is_head_sentinel(exec_node_get_prev(&instr->node));
+}
+
+static inline bool
+nir_instr_is_last(nir_instr *instr)
+{
+   return exec_node_is_tail_sentinel(exec_node_get_next(&instr->node));
+}
+
 typedef struct {
    /** for debugging only, can be NULL */
    const char* name;
-- 
2.4.5