only set InputsRead bit if input is really used

1 files changed, 5 insertions, 2 deletions

diff --git a/src/mesa/shader/arbprogparse.c b/src/mesa/shader/arbprogparse.c
index 4de8ccf0873..f74f727b240 100644
--- a/src/mesa/shader/arbprogparse.c
+++ b/src/mesa/shader/arbprogparse.c
@@ -1609,8 +1609,6 @@ parse_attrib_binding(GLcontext * ctx, const GLubyte ** inst,
       program_error(ctx, Program->Position, "Bad attribute binding");
    }
 
-   Program->Base.InputsRead |= (1 << *inputReg);
-
    return err;
 }
 
@@ -2565,6 +2563,11 @@ parse_src_reg (GLcontext * ctx, const GLubyte ** inst,
          return 1;
    }
 
+   /* Add attributes to InputsRead only if they are used the program.
+    * This avoids the handling of unused ATTRIB declarations in the drivers. */
+   if (*File == PROGRAM_INPUT)
+      Program->Base.InputsRead |= (1 << *Index);
+
    return 0;
 }