diff options
| author | Nicolai Hähnle <nicolai.haehnle@amd.com> | 2017-06-24 17:48:22 +0200 |
|---|---|---|
| committer | Nicolai Hähnle <nicolai.haehnle@amd.com> | 2017-07-05 12:33:56 +0200 |
| commit | ed37fd493277473871a6c6fd9c023f9fe177c3b7 (patch) | |
| tree | 2f6725b1065a4f45d1d690e62a4827bcb3950793 | |
| parent | 0fa97015990813aea8174daa43f58d6bbc08012e (diff) | |
radeonsi/nir: perform radeonsi-specific lowering and optimization passes
| -rw-r--r-- | src/gallium/drivers/radeonsi/si_shader_nir.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeonsi/si_shader_nir.c b/src/gallium/drivers/radeonsi/si_shader_nir.c index dc2ef8bd40..83c7ab11fe 100644 --- a/src/gallium/drivers/radeonsi/si_shader_nir.c +++ b/src/gallium/drivers/radeonsi/si_shader_nir.c @@ -337,6 +337,47 @@ si_lower_nir(struct si_shader_selector* sel) variable->data.driver_location += 1; } } + + /* Perform lowerings (and optimizations) of code. + * + * Performance considerations aside, we must: + * - lower certain ALU operations + * - ensure constant offsets for texture instructions are folded + * and copy-propagated + */ + NIR_PASS_V(sel->nir, nir_lower_returns); + NIR_PASS_V(sel->nir, nir_lower_vars_to_ssa); + NIR_PASS_V(sel->nir, nir_lower_alu_to_scalar); + NIR_PASS_V(sel->nir, nir_lower_phis_to_scalar); + + bool progress; + do { + progress = false; + + /* (Constant) copy propagation is needed for txf with offsets. */ + NIR_PASS(progress, sel->nir, nir_copy_prop); + NIR_PASS(progress, sel->nir, nir_opt_remove_phis); + NIR_PASS(progress, sel->nir, nir_opt_dce); + if (nir_opt_trivial_continues(sel->nir)) { + progress = true; + NIR_PASS(progress, sel->nir, nir_copy_prop); + NIR_PASS(progress, sel->nir, nir_opt_dce); + } + NIR_PASS(progress, sel->nir, nir_opt_if); + NIR_PASS(progress, sel->nir, nir_opt_dead_cf); + NIR_PASS(progress, sel->nir, nir_opt_cse); + NIR_PASS(progress, sel->nir, nir_opt_peephole_select, 8); + + /* Needed for algebraic lowering */ + NIR_PASS(progress, sel->nir, nir_opt_algebraic); + NIR_PASS(progress, sel->nir, nir_opt_constant_folding); + + NIR_PASS(progress, sel->nir, nir_opt_undef); + NIR_PASS(progress, sel->nir, nir_opt_conditional_discard); + if (sel->nir->options->max_unroll_iterations) { + NIR_PASS(progress, sel->nir, nir_opt_loop_unroll, 0); + } + } while (progress); } static void declare_nir_input_vs(struct si_shader_context *ctx, |