From a52b53b56e2b5d5853345d8bcd2a4ff50e495c20 Mon Sep 17 00:00:00 2001
From: Paul Berry <stereotype441@gmail.com>
Date: Tue, 2 Aug 2011 15:22:25 -0700
Subject: [PATCH] glsl: Make is_lvalue() and variable_referenced() const.

These functions don't modify the target instruction, so it makes sense
to make them const.  This allows these functions to be called from ir
validation code (which uses const to ensure that it doesn't
accidentally modify the IR being validated).

Reviewed-by: Chad Versace <chad@chad-versace.us>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
---
 src/glsl/ir.cpp |  4 ++--
 src/glsl/ir.h   | 18 +++++++++---------
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/src/glsl/ir.cpp b/src/glsl/ir.cpp
index 827fe8e..6f8676e 100644
--- a/src/glsl/ir.cpp
+++ b/src/glsl/ir.cpp
@@ -1096,7 +1096,7 @@ ir_dereference_record::ir_dereference_record(ir_variable *var,
 }
 
 bool
-ir_dereference::is_lvalue()
+ir_dereference::is_lvalue() const
 {
    ir_variable *var = this->variable_referenced();
 
@@ -1310,7 +1310,7 @@ ir_swizzle::create(ir_rvalue *val, const char *str, unsigned vector_length)
 #undef I
 
 ir_variable *
-ir_swizzle::variable_referenced()
+ir_swizzle::variable_referenced() const
 {
    return this->val->variable_referenced();
 }
diff --git a/src/glsl/ir.h b/src/glsl/ir.h
index 50a9d6e..04fa97b 100644
--- a/src/glsl/ir.h
+++ b/src/glsl/ir.h
@@ -144,7 +144,7 @@ public:
 
    ir_rvalue *as_rvalue_to_saturate();
 
-   virtual bool is_lvalue()
+   virtual bool is_lvalue() const
    {
       return false;
    }
@@ -152,7 +152,7 @@ public:
    /**
     * Get the variable that is ultimately referenced by an r-value
     */
-   virtual ir_variable *variable_referenced()
+   virtual ir_variable *variable_referenced() const
    {
       return NULL;
    }
@@ -1355,7 +1355,7 @@ public:
 
    virtual ir_visitor_status accept(ir_hierarchical_visitor *);
 
-   bool is_lvalue()
+   bool is_lvalue() const
    {
       return val->is_lvalue() && !mask.has_duplicates;
    }
@@ -1363,7 +1363,7 @@ public:
    /**
     * Get the variable that is ultimately referenced by an r-value
     */
-   virtual ir_variable *variable_referenced();
+   virtual ir_variable *variable_referenced() const;
 
    ir_rvalue *val;
    ir_swizzle_mask mask;
@@ -1387,12 +1387,12 @@ public:
       return this;
    }
 
-   bool is_lvalue();
+   bool is_lvalue() const;
 
    /**
     * Get the variable that is ultimately referenced by an r-value
     */
-   virtual ir_variable *variable_referenced() = 0;
+   virtual ir_variable *variable_referenced() const = 0;
 };
 
 
@@ -1413,7 +1413,7 @@ public:
    /**
     * Get the variable that is ultimately referenced by an r-value
     */
-   virtual ir_variable *variable_referenced()
+   virtual ir_variable *variable_referenced() const
    {
       return this->var;
    }
@@ -1462,7 +1462,7 @@ public:
    /**
     * Get the variable that is ultimately referenced by an r-value
     */
-   virtual ir_variable *variable_referenced()
+   virtual ir_variable *variable_referenced() const
    {
       return this->array->variable_referenced();
    }
@@ -1496,7 +1496,7 @@ public:
    /**
     * Get the variable that is ultimately referenced by an r-value
     */
-   virtual ir_variable *variable_referenced()
+   virtual ir_variable *variable_referenced() const
    {
       return this->record->variable_referenced();
    }
-- 
2.7.4