i965/vs: Properly clear cur_value when propagating direct copies.

Consider the following code:

MOV A.x, B.x
MOV B.x, C.x

After the first line, cur_value[A][0] == B, indicating that A.x's
current value came from register B.

When processing the second line, we update cur_value[B][0] to C.
However, for drect copies, we fail to reset cur_value[A][0] to NULL.
This is necessary because the value of A is no longer the value of B.

Fixes Counter-Strike: Source in Wine (where the menu rendered completely
black in DX9 mode), completely white textures in Civilization V, and the
new Piglit test glsl-vs-copy-propagation-1.shader_test.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=42032
Tested-by: Matt Turner <[email protected]>
Tested-by: Christopher James Halse Rogers <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>
Signed-off-by: Kenneth Graunke <[email protected]>

0 files changed, 0 insertions, 0 deletions