r600/shader: reserve first register of vertex shader.

r0 in input into vertex shaders contains things like vertexid,
we need to reserve it even if we have no inputs.

This fixes a bunch of tessellation piglits.

Cc: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index af866c4bddbd5a75c8a03a1e9ce78df9f3efb870..c6e445744edea6229c48ed97226a851fc3e1fe7b 100644 (file)
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -3051,9 +3051,11 @@ static int r600_shader_from_tgsi(struct r600_context *rctx,
                ctx.file_offset[i] = 0;
        }
 
-       if (ctx.type == PIPE_SHADER_VERTEX && ctx.info.num_inputs) {
+       if (ctx.type == PIPE_SHADER_VERTEX)  {
+
                ctx.file_offset[TGSI_FILE_INPUT] = 1;
-               r600_bytecode_add_cfinst(ctx.bc, CF_OP_CALL_FS);
+               if (ctx.info.num_inputs)
+                       r600_bytecode_add_cfinst(ctx.bc, CF_OP_CALL_FS);
        }
        if (ctx.type == PIPE_SHADER_FRAGMENT) {
                if (ctx.bc->chip_class >= EVERGREEN)