radeonsi: use 1 shader compilation thread if NIR_PRINT is used

This avoids getting multiple shaders NIR code being printed at the
same time making the log unusable.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15074>

diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
index c0a90a3..66e829c 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -34,6 +34,7 @@
 #include "si_shader_internal.h"
 #include "sid.h"
 #include "ac_shadowed_regs.h"
+#include "compiler/nir/nir.h"
 #include "util/disk_cache.h"
 #include "util/u_cpu_detect.h"
 #include "util/u_log.h"
@@ -1163,6 +1164,18 @@ static struct pipe_screen *radeonsi_screen_create_impl(struct radeon_winsys *ws,
       num_comp_lo_threads = 1;
    }
 
+#ifndef NDEBUG
+   nir_process_debug_variable();
+
+   /* Use a single compilation thread if NIR printing is enabled to avoid
+    * multiple shaders being printed at the same time.
+    */
+   if (NIR_DEBUG(PRINT)) {
+      num_comp_hi_threads = 1;
+      num_comp_lo_threads = 1;
+   }
+#endif
+
    num_comp_hi_threads = MIN2(num_comp_hi_threads, ARRAY_SIZE(sscreen->compiler));
    num_comp_lo_threads = MIN2(num_comp_lo_threads, ARRAY_SIZE(sscreen->compiler_lowp));