[Mesa-dev] [PATCH 04/21] glsl: Add a method to tell whether a built-in is available.

[Kenneth Graunke]

We can simply call the stored predicate function.

In the case where we don't have a _mesa_glsl_parse_state pointer, it
doesn't much matter whether we return true or false.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/glsl/ir.cpp | 11 +++++++++++
 src/glsl/ir.h   |  3 +++
 2 files changed, 14 insertions(+)

diff --git a/src/glsl/ir.cpp b/src/glsl/ir.cpp
index d9fb808..e9317f8 100644
--- a/src/glsl/ir.cpp
+++ b/src/glsl/ir.cpp
@@ -1596,6 +1596,17 @@ ir_function_signature::is_builtin() const
 }
 
 
+bool
+ir_function_signature::is_builtin_available(const _mesa_glsl_parse_state *state) const
+{
+   if (state == NULL)
+      return true;
+
+   assert(builtin_info != NULL);
+   return builtin_info(state);
+}
+
+
 static bool
 modes_match(unsigned a, unsigned b)
 {
diff --git a/src/glsl/ir.h b/src/glsl/ir.h
index a927e90..bd1c12c 100644
--- a/src/glsl/ir.h
+++ b/src/glsl/ir.h
@@ -686,6 +686,9 @@ public:
    /** Whether or not this function signature is a built-in. */
    bool is_builtin() const;
 
+   /** Whether or not a built-in is available for this shader. */
+   bool is_builtin_available(const _mesa_glsl_parse_state *state) const;
+
    /** Body of instructions in the function. */
    struct exec_list body;
 
-- 
1.8.3.4