mesa/shader: return correct attribute location for double matrix arrays

If we have a dmat2[4], then dmat2[0] is at 17, dmat2[1] at 19,
dmat2[2] at 21 etc. The old code was returning 17,18,19.

I think this code is also wrong for float matricies as well.

There is now a piglit for the float case.

This partly fixes:
GL41-CTS.vertex_attrib_64bit.limits_test

[airlied: update with Tapani suggestion to clean it up].

Cc: "11.0 11.1" <[email protected]>
Reviewed-by: Timothy Arceri <[email protected]>
Reviewed-by: Tapani Pälli <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
(cherry picked from commit 18ad641c3b2e926b8b3e2bd1df31fa739624cbe4)

1 files changed, 8 insertions, 3 deletions

diff --git a/src/mesa/main/shader_query.cpp b/src/mesa/main/shader_query.cpp
index 0e13572bbd1..06f27aceb3d 100644
--- a/src/mesa/main/shader_query.cpp
+++ b/src/mesa/main/shader_query.cpp
@@ -776,13 +776,18 @@ program_resource_location(struct gl_shader_program *shProg,
     * and user-defined attributes.
     */
    switch (res->Type) {
-   case GL_PROGRAM_INPUT:
+   case GL_PROGRAM_INPUT: {
+      const ir_variable *var = RESOURCE_VAR(res);
+
       /* If the input is an array, fail if the index is out of bounds. */
       if (array_index > 0
-          && array_index >= RESOURCE_VAR(res)->type->length) {
+          && array_index >= var->type->length) {
          return -1;
       }
-      return RESOURCE_VAR(res)->data.location + array_index - VERT_ATTRIB_GENERIC0;
+      return (var->data.location +
+	      (array_index * var->type->without_array()->matrix_columns) -
+	      VERT_ATTRIB_GENERIC0);
+   }
    case GL_PROGRAM_OUTPUT:
       /* If the output is an array, fail if the index is out of bounds. */
       if (array_index > 0