[Mesa-dev] [PATCH v2 24/25] i965: Call spirv_to_nir() instead of glsl_to_nir() for SPIR-V shaders

[Eduardo Lima Mitev]

This is the main fork of the shader compilation code-path, where a NIR
shader is obtained by calling spirv_to_nir() or glsl_to_nir(),
depending on its nature..

v2: Use 'spirv_data' member from gl_linked_shader to know which method
   to call. (Timothy Arceri)
---
 src/mesa/drivers/dri/i965/brw_program.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_program.c b/src/mesa/drivers/dri/i965/brw_program.c
index 755d4973cc0..596118f2fe5 100644
--- a/src/mesa/drivers/dri/i965/brw_program.c
+++ b/src/mesa/drivers/dri/i965/brw_program.c
@@ -31,6 +31,7 @@
 
 #include <pthread.h>
 #include "main/imports.h"
+#include "main/glspirv.h"
 #include "program/prog_parameter.h"
 #include "program/prog_print.h"
 #include "program/prog_to_nir.h"
@@ -73,9 +74,18 @@ brw_create_nir(struct brw_context *brw,
       ctx->Const.ShaderCompilerOptions[stage].NirOptions;
    nir_shader *nir;
 
-   /* First, lower the GLSL IR or Mesa IR to NIR */
+   /* First, lower the GLSL/Mesa IR or SPIR-V to NIR */
    if (shader_prog) {
-      nir = glsl_to_nir(shader_prog, stage, options);
+      bool is_spirv_shader =
+         (shader_prog->_LinkedShaders[stage]->spirv_data != NULL);
+
+      if (!is_spirv_shader) {
+         nir = glsl_to_nir(shader_prog, stage, options);
+      } else {
+         nir = _mesa_spirv_to_nir(ctx, shader_prog, stage, options);
+      }
+      assert (nir);
+
       nir_remove_dead_variables(nir, nir_var_shader_in | nir_var_shader_out);
       nir_lower_returns(nir);
       nir_validate_shader(nir);
-- 
2.15.0