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radeonsi: don't use the real barrier instruction in tess ctrl shaders 

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák 2016-04-07 00:49:32 +02:00
parent 715e97e342
commit baa0b3f4cc
1 changed files with 8 additions and 0 deletions
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8
src/gallium/drivers/radeonsi/si_shader.c
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@ -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",