4 files changed, 6 insertions, 5 deletions
diff --git a/src/gallium/drivers/r600/r600_asm.c b/src/gallium/drivers/r600/r600_asm.c
index b8eedae457b..a0492a66e19 100644
--- a/src/gallium/drivers/r600/r600_asm.c
+++ b/src/gallium/drivers/r600/r600_asm.c
@@ -2281,7 +2281,8 @@ void *r600_create_vertex_fetch_shader(struct pipe_context *ctx,
 	uint32_t *bytecode;
 	int i, j, r, fs_size;
 	struct r600_fetch_shader *shader;
-	unsigned sb_disasm = rctx->screen->debug_flags & (DBG_SB_DISASM | DBG_SB);
+	unsigned no_sb = rctx->screen->debug_flags & DBG_NO_SB;
+	unsigned sb_disasm = !no_sb || (rctx->screen->debug_flags & DBG_SB_DISASM);
 
 	assert(count < 32);
 
diff --git a/src/gallium/drivers/r600/r600_pipe.c b/src/gallium/drivers/r600/r600_pipe.c
index 2be5910fcb2..edd50f00b6d 100644
--- a/src/gallium/drivers/r600/r600_pipe.c
+++ b/src/gallium/drivers/r600/r600_pipe.c
@@ -67,8 +67,8 @@ static const struct debug_named_value debug_options[] = {
 	{ "noinvalrange", DBG_NO_DISCARD_RANGE, "Disable handling of INVALIDATE_RANGE map flags" },
 
 	/* shader backend */
-	{ "sb", DBG_SB, "Enable optimization of graphics shaders" },
-	{ "sbcl", DBG_SB_CS, "Enable optimization of compute shaders" },
+	{ "nosb", DBG_NO_SB, "Disable sb backend for graphics shaders" },
+	{ "sbcl", DBG_SB_CS, "Enable sb backend for compute shaders" },
 	{ "sbdry", DBG_SB_DRY_RUN, "Don't use optimized bytecode (just print the dumps)" },
 	{ "sbstat", DBG_SB_STAT, "Print optimization statistics for shaders" },
 	{ "sbdump", DBG_SB_DUMP, "Print IR dumps after some optimization passes" },
diff --git a/src/gallium/drivers/r600/r600_pipe.h b/src/gallium/drivers/r600/r600_pipe.h
index 21d68c9387b..398ac89d0ae 100644
--- a/src/gallium/drivers/r600/r600_pipe.h
+++ b/src/gallium/drivers/r600/r600_pipe.h
@@ -249,7 +249,7 @@ typedef boolean (*r600g_dma_blit_t)(struct pipe_context *ctx,
 #define DBG_NO_ASYNC_DMA	(1 << 19)
 #define DBG_NO_DISCARD_RANGE	(1 << 20)
 /* shader backend */
-#define DBG_SB			(1 << 21)
+#define DBG_NO_SB		(1 << 21)
 #define DBG_SB_CS		(1 << 22)
 #define DBG_SB_DRY_RUN	(1 << 23)
 #define DBG_SB_STAT		(1 << 24)
diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index f7eab761bb0..9a23f01731a 100644
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -140,7 +140,7 @@ int r600_pipe_shader_create(struct pipe_context *ctx,
 	int r, i;
 	uint32_t *ptr;
 	bool dump = r600_can_dump_shader(rctx->screen, tgsi_get_processor_type(sel->tokens));
-	unsigned use_sb = rctx->screen->debug_flags & DBG_SB;
+	unsigned use_sb = !(rctx->screen->debug_flags & DBG_NO_SB);
 	unsigned sb_disasm = use_sb || (rctx->screen->debug_flags & DBG_SB_DISASM);
 
 	shader->shader.bc.isa = rctx->isa;