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glsl: dont crash when attempting to assign a value to a builtin define

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For example GL_ARB_enhanced_layouts = 3;

Fixes:
GL44-CTS.enhanced_layouts.glsl_contant_immutablity

Reviewed-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Timothy Arceri 2016-05-30 12:16:39 +10:00
parent d98d6e6269
commit 87fb5aa3e7
1 changed files with 1 additions and 1 deletions
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2
src/compiler/glsl/ast_to_hir.cpp
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@ -822,7 +822,7 @@ validate_assignment(struct _mesa_glsl_parse_state *state,
*/
if (state->stage == MESA_SHADER_TESS_CTRL && !lhs->type->is_error()) {
ir_variable *var = lhs->variable_referenced();
if (var->data.mode == ir_var_shader_out && !var->data.patch) {
if (var && var->data.mode == ir_var_shader_out && !var->data.patch) {
ir_rvalue *index = find_innermost_array_index(lhs);
ir_variable *index_var = index ? index->variable_referenced() : NULL;
if (!index_var || strcmp(index_var->name, "gl_InvocationID") != 0) {