The factors may be stored to LDs by another invocation than
the invocation for vertex 0.
Signed-off-by: Bas Nieuwenhuizen <b...@basnieuwenhuizen.nl>
---
src/gallium/drivers/radeonsi/si_shader.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/gallium/drivers/radeonsi/si_shader.c
b/src/gallium/drivers/radeonsi/si_shader.c
index 166b2e8..5e5bf68 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -144,6 +144,10 @@ static void si_init_shader_ctx(struct si_shader_context
*ctx,
struct si_shader *shader,
LLVMTargetMachineRef tm);
+static void si_llvm_emit_barrier(const struct lp_build_tgsi_action *action,
+ struct lp_build_tgsi_context *bld_base,
+ struct lp_build_emit_data *emit_data);
+
/* Ideally pass the sample mask input to the PS epilog as v13, which
* is its usual location, so that the shader doesn't have to add v_mov.
*/
@@ -2534,6 +2538,8 @@ static void si_write_tess_factors(struct
lp_build_tgsi_context *bld_base,
unsigned stride, outer_comps, inner_comps, i;
struct lp_build_if_state if_ctx, inner_if_ctx;
+ si_llvm_emit_barrier(NULL, bld_base, NULL);
+
/* Do this only for invocation 0, because the tess levels are per-patch,
* not per-vertex.
*
--
2.8.3
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