[Mesa-dev] [PATCH] glsl: don't try to lower non-gl builtins as if they were gl_FragData

[Ilia Mirkin]

If a shader has an output array, it will get treated as though it were
gl_FragData and rewritten into gl_out_FragData instances. We only want
this to happen on the actual gl_FragData and not everything else.

This is a small part of the problem pointed out by the below bug.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96765
Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---
 src/compiler/glsl/opt_dead_builtin_varyings.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/compiler/glsl/opt_dead_builtin_varyings.cpp b/src/compiler/glsl/opt_dead_builtin_varyings.cpp
index 7feea3b..a28887f 100644
--- a/src/compiler/glsl/opt_dead_builtin_varyings.cpp
+++ b/src/compiler/glsl/opt_dead_builtin_varyings.cpp
@@ -85,7 +85,8 @@ public:
    {
       ir_variable *var = ir->variable_referenced();
 
-      if (!var || var->data.mode != this->mode || !var->type->is_array())
+      if (!var || var->data.mode != this->mode || !var->type->is_array() ||
+          !is_gl_identifier(var->name))
          return visit_continue;
 
       /* Only match gl_FragData[], not gl_SecondaryFragDataEXT[] */
-- 
2.7.3