Set variables with the sampler base type to read only.

Fixes increment3.frag.

1 files changed, 3 insertions, 0 deletions

diff --git a/ir.cpp b/ir.cpp
index 4c1f307e8a..90df67bbf1 100644
--- a/ir.cpp
+++ b/ir.cpp
@@ -240,6 +240,9 @@ ir_variable::ir_variable(const struct glsl_type *type, const char *name)
 {
    this->type = type;
    this->name = name;
+
+   if (type && type->base_type == GLSL_TYPE_SAMPLER)
+      this->read_only = true;
 }