mesa: Fix linker-assigned varying component counting since 8fb1e4a462

[mesa.git] / src / glsl / ir_builder.cpp

diff --git a/src/glsl/ir_builder.cpp b/src/glsl/ir_builder.cpp
index 0c8a15bc86e8e4cf46c08cbd9a5b9d0be7e1d9e6..c62f0b115bb5066711a53f40c8de9ec402111878 100644 (file)
--- a/src/glsl/ir_builder.cpp
+++ b/src/glsl/ir_builder.cpp
@@ -34,6 +34,17 @@ ir_factory::emit(ir_instruction *ir)
    instructions->push_tail(ir);
 }
 
+ir_variable *
+ir_factory::make_temp(const glsl_type *type, const char *name)
+{
+   ir_variable *var;
+
+   var = new(mem_ctx) ir_variable(type, name, ir_var_temporary);
+   emit(var);
+
+   return var;
+}
+
 ir_assignment *
 assign(deref lhs, operand rhs, int writemask)
 {
@@ -65,6 +76,21 @@ swizzle(operand a, int swizzle, int components)
                                  components);
 }
 
+ir_swizzle *
+swizzle_for_size(operand a, unsigned components)
+{
+   void *mem_ctx = ralloc_parent(a.val);
+
+   if (a.val->type->vector_elements < components)
+      components = a.val->type->vector_elements;
+
+   unsigned s[4] = { 0, 1, 2, 3 };
+   for (int i = components; i < 4; i++)
+      s[i] = components - 1;
+
+   return new(mem_ctx) ir_swizzle(a.val, s, components);
+}
+
 ir_swizzle *
 swizzle_xxxx(operand a)
 {
@@ -131,6 +157,14 @@ swizzle_xyzw(operand a)
    return swizzle(a, SWIZZLE_XYZW, 4);
 }
 
+ir_expression *
+expr(ir_expression_operation op, operand a)
+{
+   void *mem_ctx = ralloc_parent(a.val);
+
+   return new(mem_ctx) ir_expression(op, a.val);
+}
+
 ir_expression *
 expr(ir_expression_operation op, operand a, operand b)
 {