glsl: Make is_zero and is_one virtual methods of ir_rvalue

This eliminates the need in some cames to validate that an rvalue is
an ir_constant before checking to see if it's 0 or 1.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/glsl/ir.cpp b/src/glsl/ir.cpp
index 8c5441d332..574ef3e183 100644
--- a/src/glsl/ir.cpp
+++ b/src/glsl/ir.cpp
@@ -31,6 +31,16 @@ ir_rvalue::ir_rvalue()
    this->type = glsl_type::error_type;
 }
 
+bool ir_rvalue::is_zero() const
+{
+   return false;
+}
+
+bool ir_rvalue::is_one() const
+{
+   return false;
+}
+
 /**
  * Modify the swizzle make to move one component to another
  *