diff --git a/src/glsl/ir_set_program_inouts.cpp b/src/glsl/ir_set_program_inouts.cpp
index 845aa114477..e5de07e0122 100644
--- a/src/glsl/ir_set_program_inouts.cpp
+++ b/src/glsl/ir_set_program_inouts.cpp
@@ -62,6 +62,7 @@ public:
    virtual ir_visitor_status visit_enter(ir_dereference_array *);
    virtual ir_visitor_status visit_enter(ir_function_signature *);
    virtual ir_visitor_status visit_enter(ir_expression *);
+   virtual ir_visitor_status visit_enter(ir_discard *);
    virtual ir_visitor_status visit(ir_dereference_variable *);
    virtual ir_visitor_status visit(ir_variable *);
 
@@ -180,6 +181,18 @@ ir_set_program_inouts_visitor::visit_enter(ir_expression *ir)
    return visit_continue;
 }
 
+ir_visitor_status
+ir_set_program_inouts_visitor::visit_enter(ir_discard *)
+{
+   /* discards are only allowed in fragment shaders. */
+   assert(is_fragment_shader);
+
+   gl_fragment_program *fprog = (gl_fragment_program *) prog;
+   fprog->UsesKill = true;
+
+   return visit_continue;
+}
+
 void
 do_set_program_inouts(exec_list *instructions, struct gl_program *prog,
                       bool is_fragment_shader)
@@ -194,6 +207,7 @@ do_set_program_inouts(exec_list *instructions, struct gl_program *prog,
       memset(fprog->InterpQualifier, 0, sizeof(fprog->InterpQualifier));
       fprog->IsCentroid = 0;
       fprog->UsesDFdy = false;
+      fprog->UsesKill = false;
    }
    visit_list_elements(&v, instructions);
 }
diff --git a/src/mesa/drivers/dri/i965/brw_shader.cpp b/src/mesa/drivers/dri/i965/brw_shader.cpp
index 140a268cff7..935671482c7 100644
--- a/src/mesa/drivers/dri/i965/brw_shader.cpp
+++ b/src/mesa/drivers/dri/i965/brw_shader.cpp
@@ -109,31 +109,6 @@ brw_link_shader(struct gl_context *ctx, struct gl_shader_program *shProg)
 	 vp->UsesClipDistance = shProg->Vert.UsesClipDistance;
       }
 
-      if (stage == 1) {
-	 class uses_kill_visitor : public ir_hierarchical_visitor {
-	 public:
-	    uses_kill_visitor() : uses_kill(false)
-	    {
-	       /* empty */
-	    }
-
-	    virtual ir_visitor_status visit_enter(class ir_discard *ir)
-	    {
-	       this->uses_kill = true;
-	       return visit_stop;
-	    }
-
-	    bool uses_kill;
-	 };
-
-	 uses_kill_visitor v;
-
-	 v.run(shader->base.ir);
-
-	 struct gl_fragment_program *fp = (struct gl_fragment_program *) prog;
-	 fp->UsesKill = v.uses_kill;
-      }
-
       void *mem_ctx = ralloc_context(NULL);
       bool progress;
 
diff --git a/src/mesa/program/ir_to_mesa.cpp b/src/mesa/program/ir_to_mesa.cpp
index 217a264559a..8a4f31162e1 100644
--- a/src/mesa/program/ir_to_mesa.cpp
+++ b/src/mesa/program/ir_to_mesa.cpp
@@ -2157,8 +2157,6 @@ ir_to_mesa_visitor::visit(ir_return *ir)
 void
 ir_to_mesa_visitor::visit(ir_discard *ir)
 {
-   struct gl_fragment_program *fp = (struct gl_fragment_program *)this->prog;
-
    if (ir->condition) {
       ir->condition->accept(this);
       this->result.negate = ~this->result.negate;
@@ -2166,8 +2164,6 @@ ir_to_mesa_visitor::visit(ir_discard *ir)
    } else {
       emit(ir, OPCODE_KIL_NV);
    }
-
-   fp->UsesKill = GL_TRUE;
 }
 
 void
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 1d91e366197..34dbfd3b2b1 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -2758,8 +2758,6 @@ glsl_to_tgsi_visitor::visit(ir_return *ir)
 void
 glsl_to_tgsi_visitor::visit(ir_discard *ir)
 {
-   struct gl_fragment_program *fp = (struct gl_fragment_program *)this->prog;
-
    if (ir->condition) {
       ir->condition->accept(this);
       this->result.negate = ~this->result.negate;
@@ -2767,8 +2765,6 @@ glsl_to_tgsi_visitor::visit(ir_discard *ir)
    } else {
       emit(ir, TGSI_OPCODE_KILP);
    }
-
-   fp->UsesKill = GL_TRUE;
 }
 
 void