Mesa (master): glsl: Extend ir_constant::zero to handle more types.

[Kenneth Graunke]

Module: Mesa
Branch: master
Commit: 27a198388ed78c83d9a255efc0fb2294d985f3ad
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=27a198388ed78c83d9a255efc0fb2294d985f3ad

Author: Olivier Galibert <galibert at pobox.com>
Date:   Wed May  2 23:11:37 2012 +0200

glsl: Extend ir_constant::zero to handle more types.

Signed-off-by: Olivier Galibert <galibert at pobox.com>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
Reviewed-by: Eric Anholt <eric at anholt.net> [v1]

---

 src/glsl/ir.cpp |   17 ++++++++++++++++-
 1 files changed, 16 insertions(+), 1 deletions(-)

diff --git a/src/glsl/ir.cpp b/src/glsl/ir.cpp
index 1ba8751..d0a6d09 100644
--- a/src/glsl/ir.cpp
+++ b/src/glsl/ir.cpp
@@ -716,12 +716,27 @@ ir_constant::ir_constant(const struct glsl_type *type, exec_list *value_list)
 ir_constant *
 ir_constant::zero(void *mem_ctx, const glsl_type *type)
 {
-   assert(type->is_numeric() || type->is_boolean());
+   assert(type->is_scalar() || type->is_vector() || type->is_matrix()
+	  || type->is_record() || type->is_array());
 
    ir_constant *c = new(mem_ctx) ir_constant;
    c->type = type;
    memset(&c->value, 0, sizeof(c->value));
 
+   if (type->is_array()) {
+      c->array_elements = ralloc_array(c, ir_constant *, type->length);
+
+      for (unsigned i = 0; i < type->length; i++)
+	 c->array_elements[i] = ir_constant::zero(c, type->element_type());
+   }
+
+   if (type->is_record()) {
+      for (unsigned i = 0; i < type->length; i++) {
+	 ir_constant *comp = ir_constant::zero(mem_ctx, type->fields.structure[i].type);
+	 c->components.push_tail(comp);
+      }
+   }
+
    return c;
 }