diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index a53a0a2b888..756ca610852 100644
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -5102,6 +5102,12 @@ nir_component_mask_t nir_def_components_read(const nir_def *def);
 bool nir_def_all_uses_are_fsat(const nir_def *def);
 bool nir_def_all_uses_ignore_sign_bit(const nir_def *def);
 
+static inline int
+nir_def_first_component_read(nir_def *def)
+{
+    return (int)ffs(nir_def_components_read(def)) - 1;
+}
+
 static inline int
 nir_def_last_component_read(nir_def *def)
 {