Mesa (master): i965/fs: Assert that ir_expressions are usable by 3-src instructions.

[Matt Turner]

Module: Mesa
Branch: master
Commit: e817b94a2c3c3f12141d7429a5b0c7f65f36cca6
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=e817b94a2c3c3f12141d7429a5b0c7f65f36cca6

Author: Matt Turner <mattst88 at gmail.com>
Date:   Mon Aug 26 22:01:17 2013 -0700

i965/fs: Assert that ir_expressions are usable by 3-src instructions.

MAD will be generated directly from ir_triop_fma, so this assertion
checks that all ir_expressions are usable.

Reviewed-by: Paul Berry <stereotype441 at gmail.com>

---

 src/mesa/drivers/dri/i965/brw_fs_visitor.cpp |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
index 964ad40..6186a9c 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
@@ -336,6 +336,7 @@ fs_visitor::visit(ir_expression *ir)
 	 ir->operands[operand]->print();
          printf("\n");
       }
+      assert(this->result.is_valid_3src());
       op[operand] = this->result;
 
       /* Matrix expression operands should have been broken down to vector