[Mesa-dev] [PATCH 3/4] glsl: add gl_linked_shader::SourceChecksum

[Marek Olšák]

From: Marek Olšák <marek.olsak at amd.com>

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

diff --git a/src/compiler/glsl/linker.cpp b/src/compiler/glsl/linker.cpp
index 61a029c..9678a74 100644
--- a/src/compiler/glsl/linker.cpp
+++ b/src/compiler/glsl/linker.cpp
@@ -2290,20 +2290,28 @@ link_intrastage_shaders(void *mem_ctx,
       array_resize_visitor input_resize_visitor(num_vertices, prog,
                                                 MESA_SHADER_GEOMETRY);
       foreach_in_list(ir_instruction, ir, linked->ir) {
          ir->accept(&input_resize_visitor);
       }
    }
 
    if (ctx->Const.VertexID_is_zero_based)
       lower_vertex_id(linked);
 
+   /* Compute the source checksum. */
+   linked->SourceChecksum = 0;
+   for (unsigned i = 0; i < num_shaders; i++) {
+      if (shader_list[i] == NULL)
+         continue;
+      linked->SourceChecksum ^= shader_list[i]->SourceChecksum;
+   }
+
    return linked;
 }
 
 /**
  * Update the sizes of linked shader uniform arrays to the maximum
  * array index used.
  *
  * From page 81 (page 95 of the PDF) of the OpenGL 2.1 spec:
  *
  *     If one or more elements of an array are active,
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index e870053..e6ae6d6 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2275,20 +2275,21 @@ struct gl_shader_info
       bool LocalSizeVariable;
    } Comp;
 };
 
 /**
  * A linked GLSL shader object.
  */
 struct gl_linked_shader
 {
    gl_shader_stage Stage;
+   unsigned SourceChecksum;
 
    struct gl_program *Program;  /**< Post-compile assembly code */
 
    /**
     * \name Sampler tracking
     *
     * \note Each of these fields is only set post-linking.
     */
    /*@{*/
    unsigned num_samplers;	/**< Number of samplers used by this shader. */
-- 
2.7.4