[Mesa-dev] [PATCH 14/17] glsl: Don't consider read-only fragment outputs to be written to.

[Francisco Jerez]

Since they cannot be written.  This prevents adding fragment outputs
to the OutputsWritten set that are only read from via the
gl_LastFragData array but never written to.
---
 src/compiler/glsl/ir_set_program_inouts.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/glsl/ir_set_program_inouts.cpp b/src/compiler/glsl/ir_set_program_inouts.cpp
index 7c61994..0809497 100644
--- a/src/compiler/glsl/ir_set_program_inouts.cpp
+++ b/src/compiler/glsl/ir_set_program_inouts.cpp
@@ -137,7 +137,7 @@ mark(struct gl_program *prog, ir_variable *var, int offset, int len,
          assert(var->data.mode == ir_var_shader_out);
          if (is_patch_generic)
             prog->PatchOutputsWritten |= bitfield;
-         else
+         else if (!var->data.read_only)
             prog->OutputsWritten |= bitfield;
       }
    }
-- 
2.9.0