Create a new search function to look for matching built-in functions by name
and use it for built-in function redefinition or overload in GLSL ES 3.00.
GLSL ES 3.0 spec, chapter 6.1 Function Definitions, page 71
A shader cannot redefine or overload built-in functions.
While in GLSL ES 1.0 specification, chapter 8 Built-in Functions
User code can overload the built-in functions but cannot redefine them.
So this check is specific to GLSL ES 3.00.
This patch fixes the following dEQP tests:
dEQP-GLES3.functional.shaders.functions.invalid.overload_builtin_function_vertex
dEQP-GLES3.functional.shaders.functions.invalid.overload_builtin_function_fragment
dEQP-GLES3.functional.shaders.functions.invalid.redefine_builtin_function_vertex
dEQP-GLES3.functional.shaders.functions.invalid.redefine_builtin_function_fragment
No piglit regressions.
Signed-off-by: Samuel Iglesias Gonsalvez sigles...@igalia.com
---
src/glsl/ast_to_hir.cpp| 21 +
src/glsl/builtin_functions.cpp | 11 +++
src/glsl/ir.h | 4
3 files changed, 36 insertions(+)
diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp
index 2c63de0..acb5c76 100644
--- a/src/glsl/ast_to_hir.cpp
+++ b/src/glsl/ast_to_hir.cpp
@@ -4205,6 +4205,27 @@ ast_function::hir(exec_list *instructions,
emit_function(state, f);
}
+ /* From GLSL ES 3.0 spec, chapter 6.1 Function Definitions, page 71:
+*
+* A shader cannot redefine or overload built-in functions.
+*
+* While in GLSL ES 1.0 specification, chapter 8 Built-in Functions:
+*
+* User code can overload the built-in functions but cannot redefine
+* them.
+*/
+ if (state-es_shader state-language_version = 300) {
+ /* Local shader has no exact candidates; check the built-ins. */
+ _mesa_glsl_initialize_builtin_functions();
+ if (_mesa_glsl_find_builtin_function_by_name(state, name)) {
+ YYLTYPE loc = this-get_location();
+ _mesa_glsl_error( loc, state,
+ A shader cannot redefine or overload built-in
+ function `%s' in GLSL ES 3.00, name);
+ return NULL;
+ }
+ }
+
/* Verify that this function's signature either doesn't match a previously
* seen signature for a function with the same name, or, if a match is
found,
* that the previously seen signature does not have an associated
definition.
diff --git a/src/glsl/builtin_functions.cpp b/src/glsl/builtin_functions.cpp
index fb31dad..b643927 100644
--- a/src/glsl/builtin_functions.cpp
+++ b/src/glsl/builtin_functions.cpp
@@ -4851,6 +4851,17 @@ _mesa_glsl_find_builtin_function(_mesa_glsl_parse_state
*state,
return s;
}
+ir_function *
+_mesa_glsl_find_builtin_function_by_name(_mesa_glsl_parse_state *state,
+ const char *name)
+{
+ ir_function *f;
+ mtx_lock(builtins_lock);
+ f = builtins.shader-symbols-get_function(name);
+ mtx_unlock(builtins_lock);
+ return f;
+}
+
gl_shader *
_mesa_glsl_get_builtin_function_shader()
{
diff --git a/src/glsl/ir.h b/src/glsl/ir.h
index 8c3845f..ce35b2b 100644
--- a/src/glsl/ir.h
+++ b/src/glsl/ir.h
@@ -2439,6 +2439,10 @@ extern ir_function_signature *
_mesa_glsl_find_builtin_function(_mesa_glsl_parse_state *state,
const char *name, exec_list
*actual_parameters);
+extern ir_function *
+_mesa_glsl_find_builtin_function_by_name(_mesa_glsl_parse_state *state,
+ const char *name);
+
extern gl_shader *
_mesa_glsl_get_builtin_function_shader(void);
--
2.1.0
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