Mesa (main): mesa: add gl_linked_shader::linked_source_sha1

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Module: Mesa
Branch: main
Commit: 67f01e02d9daa3334f14f17899bc7aa068d89459
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=67f01e02d9daa3334f14f17899bc7aa068d89459

Author: Marek Olšák <marek.olsak at amd.com>
Date:   Thu Nov 18 09:15:27 2021 -0500

mesa: add gl_linked_shader::linked_source_sha1

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer at amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13869>

---

 src/compiler/glsl/linker.cpp | 18 ++++++++++++++++++
 src/mesa/main/mtypes.h       |  3 +++
 2 files changed, 21 insertions(+)

diff --git a/src/compiler/glsl/linker.cpp b/src/compiler/glsl/linker.cpp
index fa44fa887bc..7ec74df0829 100644
--- a/src/compiler/glsl/linker.cpp
+++ b/src/compiler/glsl/linker.cpp
@@ -2654,6 +2654,24 @@ link_intrastage_shaders(void *mem_ctx,
    if (ctx->Const.LowerCsDerivedVariables)
       lower_cs_derived(linked);
 
+   /* Set the linked source SHA1. */
+   if (num_shaders == 1) {
+      memcpy(linked->linked_source_sha1, shader_list[0]->compiled_source_sha1,
+             SHA1_DIGEST_LENGTH);
+   } else {
+      struct mesa_sha1 sha1_ctx;
+      _mesa_sha1_init(&sha1_ctx);
+
+      for (unsigned i = 0; i < num_shaders; i++) {
+         if (shader_list[i] == NULL)
+            continue;
+
+         _mesa_sha1_update(&sha1_ctx, shader_list[i]->compiled_source_sha1,
+                           SHA1_DIGEST_LENGTH);
+      }
+      _mesa_sha1_final(&sha1_ctx, linked->linked_source_sha1);
+   }
+
    return linked;
 }
 
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 20719c757b2..6de28f39112 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2610,6 +2610,9 @@ struct gl_linked_shader
 {
    gl_shader_stage Stage;
 
+   /** All gl_shader::compiled_source_sha1 combined. */
+   uint8_t linked_source_sha1[SHA1_DIGEST_LENGTH];
+
    struct gl_program *Program;  /**< Post-compile assembly code */
 
    /**