mesa: Replace the EmitNoIfs compiler flag with a MaxIfDepth flag.

This is a better, more fine-grained way of lowering if statements.  Fixes the
game And Yet It Moves on nv50.

Reviewed-by: Ian Romanick <[email protected]>

2 files changed, 4 insertions, 4 deletions

diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 8e900934054..322dbbfd51d 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -173,7 +173,7 @@ void st_init_limits(struct st_context *st)
       options->EmitNoNoise = TRUE;
 
       /* TODO: make these more fine-grained if anyone needs it */
-      options->EmitNoIfs = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
+      options->MaxIfDepth = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
       options->EmitNoLoops = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
       options->EmitNoFunctions = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
       options->EmitNoMainReturn = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 98bea69b959..e2857edf390 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -4991,10 +4991,10 @@ st_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
 
          progress = lower_quadop_vector(ir, false) || progress;
 
-         if (options->EmitNoIfs) {
+         if (options->MaxIfDepth == 0)
             progress = lower_discard(ir) || progress;
-            progress = lower_if_to_cond_assign(ir) || progress;
-         }
+
+         progress = lower_if_to_cond_assign(ir, options->MaxIfDepth) || progress;
 
          if (options->EmitNoNoise)
             progress = lower_noise(ir) || progress;