From: Nicolai Hähnle <nicolai.haeh...@amd.com>
This crashes gcc's undefined behaviour sanitizer.
---
src/compiler/glsl/ir.cpp | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/src/compiler/glsl/ir.cpp b/src/compiler/glsl/ir.cpp
index 750f617..d69ab13 100644
--- a/src/compiler/glsl/ir.cpp
+++ b/src/compiler/glsl/ir.cpp
@@ -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;
}
}
--
2.7.4
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