glsl: Add lowering pass for shared variable references

In this lowering pass, shared variables are decomposed into intrinsic
calls.

v2:
 * Send mem_ctx as a parameter (Iago)

v3:
 * Shared variables don't have an associated interface block (Iago)
 * Always use 430 packing (Iago)
 * Comment / whitespace cleanup (Iago)

Signed-off-by: Jordan Justen <[email protected]>
Reviewed-by: Iago Toral Quiroga <[email protected]>
Reviewed-by: Kristian Høgsberg <[email protected]>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index de54169cc8a..48309bf65ec 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2674,6 +2674,10 @@ struct gl_shader_program
        * local_size_{x,y,z}.  Otherwise undefined.
        */
       unsigned LocalSize[3];
+      /**
+       * Size of shared variables accessed by the compute shader.
+       */
+      unsigned SharedSize;
    } Comp;
 
    /* post-link info: */
@@ -2885,6 +2889,9 @@ struct gl_shader_compiler_options
 
    GLboolean LowerBufferInterfaceBlocks; /**< Lower UBO and SSBO access to intrinsics. */
 
+   GLboolean LowerShaderSharedVariables; /**< Lower compute shader shared
+                                          *   variable access to intrinsics. */
+
    const struct nir_shader_compiler_options *NirOptions;
 };