Commit 945c6887 authored by Nicolai Hähnle's avatar Nicolai Hähnle

compiler/glsl: do not downcast list sentinel

This crashes gcc's undefined behaviour sanitizer.
Reviewed-by: default avatarMarek Olšák <marek.olsak@amd.com>
parent bdad1393
......@@ -869,7 +869,8 @@ ir_constant::ir_constant(const struct glsl_type *type, exec_list *value_list)
/* Use each component from each entry in the value_list to initialize one
* component of the constant being constructed.
*/
for (unsigned i = 0; i < type->components(); /* empty */) {
unsigned i = 0;
for (;;) {
assert(value->as_constant() != NULL);
assert(!value->is_tail_sentinel());
......@@ -901,6 +902,8 @@ ir_constant::ir_constant(const struct glsl_type *type, exec_list *value_list)
break;
}
if (i >= type->components())
break; /* avoid downcasting a list sentinel */
value = (ir_constant *) value->next;
}
}
......
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