glsl: Add IR builder support for generating return statements.

We use "ret" as the function name since "return" is a C++ keyword, and
"ir_return" is already a class name.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Paul Berry <stereotype441@gmail.com>

diff --git a/src/glsl/ir_builder.cpp b/src/glsl/ir_builder.cpp
index b2b926b..b549ff4 100644 (file)
--- a/src/glsl/ir_builder.cpp
+++ b/src/glsl/ir_builder.cpp
@@ -76,6 +76,13 @@ assign(deref lhs, operand rhs, operand condition)
    return assign(lhs, rhs, condition, (1 << lhs.val->type->vector_elements) - 1);
 }
 
+ir_return *
+ret(operand retval)
+{
+   void *mem_ctx = ralloc_parent(retval.val);
+   return new(mem_ctx) ir_return(retval.val);
+}
+
 ir_swizzle *
 swizzle(operand a, int swizzle, int components)
 {

diff --git a/src/glsl/ir_builder.h b/src/glsl/ir_builder.h
index c852849..d423fc5 100644 (file)
--- a/src/glsl/ir_builder.h
+++ b/src/glsl/ir_builder.h
@@ -125,6 +125,8 @@ ir_assignment *assign(deref lhs, operand rhs, int writemask);
 ir_assignment *assign(deref lhs, operand rhs, operand condition);
 ir_assignment *assign(deref lhs, operand rhs, operand condition, int writemask);
 
+ir_return *ret(operand retval);
+
 ir_expression *expr(ir_expression_operation op, operand a);
 ir_expression *expr(ir_expression_operation op, operand a, operand b);
 ir_expression *expr(ir_expression_operation op, operand a, operand b, operand c);