[Mesa-dev] [PATCH 1/4] glsl: Calculate bitset of secondary outputs written in ir_set_program_inouts.

[Francisco Jerez]

---
 src/compiler/glsl/ir_set_program_inouts.cpp | 9 +++++++--
 src/mesa/main/mtypes.h                      | 1 +
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/compiler/glsl/ir_set_program_inouts.cpp b/src/compiler/glsl/ir_set_program_inouts.cpp
index fcfbcd4..06d9973 100644
--- a/src/compiler/glsl/ir_set_program_inouts.cpp
+++ b/src/compiler/glsl/ir_set_program_inouts.cpp
@@ -135,10 +135,14 @@ mark(struct gl_program *prog, ir_variable *var, int offset, int len,
          prog->SystemValuesRead |= bitfield;
       } else {
          assert(var->data.mode == ir_var_shader_out);
-         if (is_patch_generic)
+         if (is_patch_generic) {
             prog->PatchOutputsWritten |= bitfield;
-         else if (!var->data.read_only)
+         } else if (!var->data.read_only) {
             prog->OutputsWritten |= bitfield;
+            if (var->data.index > 0)
+               prog->SecondaryOutputsWritten |= bitfield;
+         }
+
          if (var->data.fb_fetch_output)
             prog->OutputsRead |= bitfield;
       }
@@ -446,6 +450,7 @@ do_set_program_inouts(exec_list *instructions, struct gl_program *prog,
 
    prog->InputsRead = 0;
    prog->OutputsWritten = 0;
+   prog->SecondaryOutputsWritten = 0;
    prog->OutputsRead = 0;
    prog->PatchInputsRead = 0;
    prog->PatchOutputsWritten = 0;
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 4013ca7..09b84f1 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -1919,6 +1919,7 @@ struct gl_program
    GLbitfield64 InputsRead;     /**< Bitmask of which input regs are read */
    GLbitfield64 DoubleInputsRead;     /**< Bitmask of which input regs are read  and are doubles */
    GLbitfield64 OutputsWritten; /**< Bitmask of which output regs are written */
+   GLbitfield64 SecondaryOutputsWritten; /**< Subset of OutputsWritten outputs written with non-zero index. */
    GLbitfield64 OutputsRead; /**< Bitmask of which output regs are read */
    GLbitfield PatchInputsRead;  /**< VAR[0..31] usage for patch inputs (user-defined only) */
    GLbitfield PatchOutputsWritten; /**< VAR[0..31] usage for patch outputs (user-defined only) */
-- 
2.9.0