glsl: move to compiler/

Signed-off-by: Emil Velikov <[email protected]>
Acked-by: Matt Turner <[email protected]>
Acked-by: Jose Fonseca <[email protected]>

1 files changed, 0 insertions, 333 deletions

diff --git a/src/glsl/ast_array_index.cpp b/src/glsl/ast_array_index.cpp
deleted file mode 100644
index f5baeb9ea32..00000000000
--- a/src/glsl/ast_array_index.cpp
+++ /dev/null
@@ -1,333 +0,0 @@
-/*
- * Copyright © 2010 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- */
-
-#include "ast.h"
-#include "compiler/glsl_types.h"
-#include "ir.h"
-
-void
-ast_array_specifier::print(void) const
-{
-   foreach_list_typed (ast_node, array_dimension, link, &this->array_dimensions) {
-      printf("[ ");
-      if (((ast_expression*)array_dimension)->oper != ast_unsized_array_dim)
-         array_dimension->print();
-      printf("] ");
-   }
-}
-
-/**
- * If \c ir is a reference to an array for which we are tracking the max array
- * element accessed, track that the given element has been accessed.
- * Otherwise do nothing.
- *
- * This function also checks whether the array is a built-in array whose
- * maximum size is too small to accommodate the given index, and if so uses
- * loc and state to report the error.
- */
-static void
-update_max_array_access(ir_rvalue *ir, int idx, YYLTYPE *loc,
-                        struct _mesa_glsl_parse_state *state)
-{
-   if (ir_dereference_variable *deref_var = ir->as_dereference_variable()) {
-      ir_variable *var = deref_var->var;
-      if (idx > (int)var->data.max_array_access) {
-         var->data.max_array_access = idx;
-
-         /* Check whether this access will, as a side effect, implicitly cause
-          * the size of a built-in array to be too large.
-          */
-         check_builtin_array_max_size(var->name, idx+1, *loc, state);
-      }
-   } else if (ir_dereference_record *deref_record =
-              ir->as_dereference_record()) {
-      /* There are three possibilities we need to consider:
-       *
-       * - Accessing an element of an array that is a member of a named
-       *   interface block (e.g. ifc.foo[i])
-       *
-       * - Accessing an element of an array that is a member of a named
-       *   interface block array (e.g. ifc[j].foo[i]).
-       *
-       * - Accessing an element of an array that is a member of a named
-       *   interface block array of arrays (e.g. ifc[j][k].foo[i]).
-       */
-      ir_dereference_variable *deref_var =
-         deref_record->record->as_dereference_variable();
-      if (deref_var == NULL) {
-         ir_dereference_array *deref_array =
-            deref_record->record->as_dereference_array();
-         ir_dereference_array *deref_array_prev = NULL;
-         while (deref_array != NULL) {
-            deref_array_prev = deref_array;
-            deref_array = deref_array->array->as_dereference_array();
-         }
-         if (deref_array_prev != NULL)
-            deref_var = deref_array_prev->array->as_dereference_variable();
-      }
-
-      if (deref_var != NULL) {
-         if (deref_var->var->is_interface_instance()) {
-            unsigned field_index =
-               deref_record->record->type->field_index(deref_record->field);
-            assert(field_index < deref_var->var->get_interface_type()->length);
-
-            unsigned *const max_ifc_array_access =
-               deref_var->var->get_max_ifc_array_access();
-
-            assert(max_ifc_array_access != NULL);
-
-            if (idx > (int)max_ifc_array_access[field_index]) {
-               max_ifc_array_access[field_index] = idx;
-
-               /* Check whether this access will, as a side effect, implicitly
-                * cause the size of a built-in array to be too large.
-                */
-               check_builtin_array_max_size(deref_record->field, idx+1, *loc,
-                                            state);
-            }
-         }
-      }
-   }
-}
-
-
-static int
-get_implicit_array_size(struct _mesa_glsl_parse_state *state,
-                        ir_rvalue *array)
-{
-   ir_variable *var = array->variable_referenced();
-
-   /* Inputs in control shader are implicitly sized
-    * to the maximum patch size.
-    */
-   if (state->stage == MESA_SHADER_TESS_CTRL &&
-       var->data.mode == ir_var_shader_in) {
-      return state->Const.MaxPatchVertices;
-   }
-
-   /* Non-patch inputs in evaluation shader are implicitly sized
-    * to the maximum patch size.
-    */
-   if (state->stage == MESA_SHADER_TESS_EVAL &&
-       var->data.mode == ir_var_shader_in &&
-       !var->data.patch) {
-      return state->Const.MaxPatchVertices;
-   }
-
-   return 0;
-}
-
-
-ir_rvalue *
-_mesa_ast_array_index_to_hir(void *mem_ctx,
-			     struct _mesa_glsl_parse_state *state,
-			     ir_rvalue *array, ir_rvalue *idx,
-			     YYLTYPE &loc, YYLTYPE &idx_loc)
-{
-   if (!array->type->is_error()
-       && !array->type->is_array()
-       && !array->type->is_matrix()
-       && !array->type->is_vector()) {
-      _mesa_glsl_error(& idx_loc, state,
-		       "cannot dereference non-array / non-matrix / "
-		       "non-vector");
-   }
-
-   if (!idx->type->is_error()) {
-      if (!idx->type->is_integer()) {
-	 _mesa_glsl_error(& idx_loc, state, "array index must be integer type");
-      } else if (!idx->type->is_scalar()) {
-	 _mesa_glsl_error(& idx_loc, state, "array index must be scalar");
-      }
-   }
-
-   /* If the array index is a constant expression and the array has a
-    * declared size, ensure that the access is in-bounds.  If the array
-    * index is not a constant expression, ensure that the array has a
-    * declared size.
-    */
-   ir_constant *const const_index = idx->constant_expression_value();
-   if (const_index != NULL && idx->type->is_integer()) {
-      const int idx = const_index->value.i[0];
-      const char *type_name = "error";
-      unsigned bound = 0;
-
-      /* From page 24 (page 30 of the PDF) of the GLSL 1.50 spec:
-       *
-       *    "It is illegal to declare an array with a size, and then
-       *    later (in the same shader) index the same array with an
-       *    integral constant expression greater than or equal to the
-       *    declared size. It is also illegal to index an array with a
-       *    negative constant expression."
-       */
-      if (array->type->is_matrix()) {
-	 if (array->type->row_type()->vector_elements <= idx) {
-	    type_name = "matrix";
-	    bound = array->type->row_type()->vector_elements;
-	 }
-      } else if (array->type->is_vector()) {
-	 if (array->type->vector_elements <= idx) {
-	    type_name = "vector";
-	    bound = array->type->vector_elements;
-	 }
-      } else {
-	 /* glsl_type::array_size() returns -1 for non-array types.  This means
-	  * that we don't need to verify that the type is an array before
-	  * doing the bounds checking.
-	  */
-	 if ((array->type->array_size() > 0)
-	     && (array->type->array_size() <= idx)) {
-	    type_name = "array";
-	    bound = array->type->array_size();
-	 }
-      }
-
-      if (bound > 0) {
-	 _mesa_glsl_error(& loc, state, "%s index must be < %u",
-			  type_name, bound);
-      } else if (idx < 0) {
-	 _mesa_glsl_error(& loc, state, "%s index must be >= 0",
-			  type_name);
-      }
-
-      if (array->type->is_array())
-         update_max_array_access(array, idx, &loc, state);
-   } else if (const_index == NULL && array->type->is_array()) {
-      if (array->type->is_unsized_array()) {
-         int implicit_size = get_implicit_array_size(state, array);
-         if (implicit_size) {
-            ir_variable *v = array->whole_variable_referenced();
-            if (v != NULL)
-               v->data.max_array_access = implicit_size - 1;
-         }
-         else if (state->stage == MESA_SHADER_TESS_CTRL &&
-                  array->variable_referenced()->data.mode == ir_var_shader_out &&
-                  !array->variable_referenced()->data.patch) {
-            /* Tessellation control shader output non-patch arrays are
-             * initially unsized. Despite that, they are allowed to be
-             * indexed with a non-constant expression (typically
-             * "gl_InvocationID"). The array size will be determined
-             * by the linker.
-             */
-         }
-         else if (array->variable_referenced()->data.mode !=
-                  ir_var_shader_storage) {
-            _mesa_glsl_error(&loc, state, "unsized array index must be constant");
-         }
-      } else if (array->type->without_array()->is_interface()
-                 && (array->variable_referenced()->data.mode == ir_var_uniform ||
-                     array->variable_referenced()->data.mode == ir_var_shader_storage)
-                 && !state->is_version(400, 0) && !state->ARB_gpu_shader5_enable) {
-	 /* Page 50 in section 4.3.9 of the OpenGL ES 3.10 spec says:
-	  *
-	  *     "All indices used to index a uniform or shader storage block
-	  *     array must be constant integral expressions."
-	  */
-	 _mesa_glsl_error(&loc, state, "%s block array index must be constant",
-                          array->variable_referenced()->data.mode
-                          == ir_var_uniform ? "uniform" : "shader storage");
-      } else {
-	 /* whole_variable_referenced can return NULL if the array is a
-	  * member of a structure.  In this case it is safe to not update
-	  * the max_array_access field because it is never used for fields
-	  * of structures.
-	  */
-	 ir_variable *v = array->whole_variable_referenced();
-	 if (v != NULL)
-	    v->data.max_array_access = array->type->array_size() - 1;
-      }
-
-      /* From page 23 (29 of the PDF) of the GLSL 1.30 spec:
-       *
-       *    "Samplers aggregated into arrays within a shader (using square
-       *    brackets [ ]) can only be indexed with integral constant
-       *    expressions [...]."
-       *
-       * This restriction was added in GLSL 1.30.  Shaders using earlier
-       * version of the language should not be rejected by the compiler
-       * front-end for using this construct.  This allows useful things such
-       * as using a loop counter as the index to an array of samplers.  If the
-       * loop in unrolled, the code should compile correctly.  Instead, emit a
-       * warning.
-       *
-       * In GLSL 4.00 / ARB_gpu_shader5, this requirement is relaxed again to allow
-       * indexing with dynamically uniform expressions. Note that these are not
-       * required to be uniforms or expressions based on them, but merely that the
-       * values must not diverge between shader invocations run together. If the
-       * values *do* diverge, then the behavior of the operation requiring a
-       * dynamically uniform expression is undefined.
-       */
-      if (array->type->without_array()->is_sampler()) {
-         if (!state->is_version(400, 0) && !state->ARB_gpu_shader5_enable) {
-            if (state->is_version(130, 300))
-               _mesa_glsl_error(&loc, state,
-                                "sampler arrays indexed with non-constant "
-                                "expressions are forbidden in GLSL %s "
-                                "and later",
-                                state->es_shader ? "ES 3.00" : "1.30");
-            else if (state->es_shader)
-               _mesa_glsl_warning(&loc, state,
-                                  "sampler arrays indexed with non-constant "
-                                  "expressions will be forbidden in GLSL "
-                                  "3.00 and later");
-            else
-               _mesa_glsl_warning(&loc, state,
-                                  "sampler arrays indexed with non-constant "
-                                  "expressions will be forbidden in GLSL "
-                                  "1.30 and later");
-         }
-      }
-
-      /* From page 27 of the GLSL ES 3.1 specification:
-       *
-       * "When aggregated into arrays within a shader, images can only be
-       *  indexed with a constant integral expression."
-       *
-       * On the other hand the desktop GL specification extension allows
-       * non-constant indexing of image arrays, but behavior is left undefined
-       * in cases where the indexing expression is not dynamically uniform.
-       */
-      if (state->es_shader && array->type->without_array()->is_image()) {
-         _mesa_glsl_error(&loc, state,
-                          "image arrays indexed with non-constant "
-                          "expressions are forbidden in GLSL ES.");
-      }
-   }
-
-   /* After performing all of the error checking, generate the IR for the
-    * expression.
-    */
-   if (array->type->is_array()
-       || array->type->is_matrix()
-       || array->type->is_vector()) {
-      return new(mem_ctx) ir_dereference_array(array, idx);
-   } else if (array->type->is_error()) {
-      return array;
-   } else {
-      ir_rvalue *result = new(mem_ctx) ir_dereference_array(array, idx);
-      result->type = glsl_type::error_type;
-
-      return result;
-   }
-}