diff options
| author | Nicolai Hähnle <nicolai.haehnle@amd.com> | 2017-06-24 17:48:22 +0200 |
|---|---|---|
| committer | Nicolai Hähnle <nicolai.haehnle@amd.com> | 2017-07-31 14:55:40 +0200 |
| commit | 41d4016e061eea2a4be4f9c64930b818b9572f00 (patch) | |
| tree | 41914e9b66de87d664b555a941b903c97bfdd624 | |
| parent | b49c2c9fa39f5a24d0c28863438d7e428aa564df (diff) | |
radeonsi/nir: perform radeonsi-specific lowering and optimization passes
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
| -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 2c311d3865..d87f6b831d 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, |