glsl: Add a constant_referenced method to ir_dereference*

The method is used to get a reference to an ir_constant * within the
context of evaluating an assignment when calculating a
constant_expression_value.

Signed-off-by: Olivier Galibert <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>
Reviewed-by: Eric Anholt <[email protected]> [v1]

1 files changed, 36 insertions, 0 deletions

diff --git a/src/glsl/ir.h b/src/glsl/ir.h
index d7df41d893c..dc96e1fe9ed 100644
--- a/src/glsl/ir.h
+++ b/src/glsl/ir.h
@@ -1451,6 +1451,15 @@ public:
     * Get the variable that is ultimately referenced by an r-value
     */
    virtual ir_variable *variable_referenced() const = 0;
+
+   /**
+    * Get the constant that is ultimately referenced by an r-value,
+    * in a constant expression evaluation context.
+    *
+    * The offset is used when the reference is to a specific column of
+    * a matrix.
+    */
+  virtual void constant_referenced(struct hash_table *variable_context, ir_constant *&store, int &offset) const = 0;
 };
 
 
@@ -1476,6 +1485,15 @@ public:
       return this->var;
    }
 
+   /**
+    * Get the constant that is ultimately referenced by an r-value,
+    * in a constant expression evaluation context.
+    *
+    * The offset is used when the reference is to a specific column of
+    * a matrix.
+    */
+   virtual void constant_referenced(struct hash_table *variable_context, ir_constant *&store, int &offset) const;
+
    virtual ir_variable *whole_variable_referenced()
    {
       /* ir_dereference_variable objects always dereference the entire
@@ -1525,6 +1543,15 @@ public:
       return this->array->variable_referenced();
    }
 
+   /**
+    * Get the constant that is ultimately referenced by an r-value,
+    * in a constant expression evaluation context.
+    *
+    * The offset is used when the reference is to a specific column of
+    * a matrix.
+    */
+   virtual void constant_referenced(struct hash_table *variable_context, ir_constant *&store, int &offset) const;
+
    virtual void accept(ir_visitor *v)
    {
       v->visit(this);
@@ -1559,6 +1586,15 @@ public:
       return this->record->variable_referenced();
    }
 
+   /**
+    * Get the constant that is ultimately referenced by an r-value,
+    * in a constant expression evaluation context.
+    *
+    * The offset is used when the reference is to a specific column of
+    * a matrix.
+    */
+   virtual void constant_referenced(struct hash_table *variable_context, ir_constant *&store, int &offset) const;
+
    virtual void accept(ir_visitor *v)
    {
       v->visit(this);