Reviewed-by: Nicolai Hähnle <nicolai.haeh...@amd.com>
On 06.04.2016 19:07, Marek Olšák wrote:
From: Marek Olšák <marek.ol...@amd.com>
---
src/gallium/drivers/radeonsi/si_shader.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/src/gallium/drivers/radeonsi/si_shader.c
b/src/gallium/drivers/radeonsi/si_shader.c
index bf3f008..08da3e3 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -4282,6 +4282,14 @@ static void si_llvm_emit_barrier(const struct
lp_build_tgsi_action *action,
struct si_shader_context *ctx = si_shader_context(bld_base);
struct gallivm_state *gallivm = bld_base->base.gallivm;
+ /* The real barrier instruction isn’t needed, because an entire patch
+ * always fits into a single wave.
+ */
+ if (ctx->type == TGSI_PROCESSOR_TESS_CTRL) {
+ emit_optimization_barrier(ctx);
+ return;
+ }
+
lp_build_intrinsic(gallivm->builder,
HAVE_LLVM >= 0x0309 ? "llvm.amdgcn.s.barrier"
: "llvm.AMDGPU.barrier.local",
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