v3d: Return an invalid src number if asked for a missing implicit uniform.

Sometimes when iterating over sources, we might want to check if it's the
implicit one.  We wouldn't want to match on a non-implicit src using this
function.

2 files changed, 3 insertions, 3 deletions

diff --git a/src/broadcom/compiler/vir.c b/src/broadcom/compiler/vir.c
index 6ee3b98087a..5a4bf80f93d 100644
--- a/src/broadcom/compiler/vir.c
+++ b/src/broadcom/compiler/vir.c
@@ -74,6 +74,8 @@ vir_has_implicit_uniform(struct qinst *inst)
 int
 vir_get_implicit_uniform_src(struct qinst *inst)
 {
+        if (!vir_has_implicit_uniform(inst))
+                return -1;
         return vir_get_nsrc(inst) - 1;
 }
 
diff --git a/src/broadcom/compiler/vir_lower_uniforms.c b/src/broadcom/compiler/vir_lower_uniforms.c
index 97375b483b0..1e900404c9c 100644
--- a/src/broadcom/compiler/vir_lower_uniforms.c
+++ b/src/broadcom/compiler/vir_lower_uniforms.c
@@ -76,9 +76,7 @@ is_lowerable_uniform(struct qinst *inst, int i)
 {
         if (inst->src[i].file != QFILE_UNIF)
                 return false;
-        if (vir_has_implicit_uniform(inst))
-                return i != vir_get_implicit_uniform_src(inst);
-        return true;
+        return i != vir_get_implicit_uniform_src(inst);
 }
 
 /* Returns the number of different uniform values referenced by the