diff options
| author | Timothy Arceri <[email protected]> | 2018-11-02 08:53:16 +1100 |
|---|---|---|
| committer | Timothy Arceri <[email protected]> | 2018-11-02 15:56:34 +1100 |
| commit | c7bdda8aa5f1fb1d797512a0a54a032153755c6c (patch) | |
| tree | 6c80166b5d7d1d386be11ece59ada94a8af11e45 | |
| parent | 677b496b6bd07cbe05dd429344ba525619cdd08c (diff) | |
nir: allow propagation of if evaluation for bcsel
Shader-db results Skylake:
total instructions in shared programs: 13109035 -> 13109024 (<.01%)
instructions in affected programs: 4777 -> 4766 (-0.23%)
helped: 11
HURT: 0
total cycles in shared programs: 332090418 -> 332090443 (<.01%)
cycles in affected programs: 19474 -> 19499 (0.13%)
helped: 6
HURT: 4
Reviewed-by: Jason Ekstrand <[email protected]>
| -rw-r--r-- | src/compiler/nir/nir_opt_if.c | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/src/compiler/nir/nir_opt_if.c b/src/compiler/nir/nir_opt_if.c index 1fe95e53766..ed93cac9ce9 100644 --- a/src/compiler/nir/nir_opt_if.c +++ b/src/compiler/nir/nir_opt_if.c @@ -448,7 +448,7 @@ propagate_condition_eval(nir_builder *b, nir_if *nif, nir_src *use_src, if (!evaluate_if_condition(nif, b->cursor, &bool_value)) return false; - nir_ssa_def *def[2] = {0}; + nir_ssa_def *def[4] = {0}; for (unsigned i = 0; i < nir_op_infos[alu->op].num_inputs; i++) { if (alu->src[i].src.ssa == use_src->ssa) { def[i] = nir_imm_bool(b, bool_value); @@ -456,7 +456,7 @@ propagate_condition_eval(nir_builder *b, nir_if *nif, nir_src *use_src, def[i] = alu->src[i].src.ssa; } } - nir_ssa_def *nalu = nir_build_alu(b, alu->op, def[0], def[1], NULL, NULL); + nir_ssa_def *nalu = nir_build_alu(b, alu->op, def[0], def[1], def[2], def[3]); /* Rewrite use to use new alu instruction */ nir_src new_src = nir_src_for_ssa(nalu); @@ -472,14 +472,21 @@ propagate_condition_eval(nir_builder *b, nir_if *nif, nir_src *use_src, static bool can_propagate_through_alu(nir_src *src) { - if (src->parent_instr->type == nir_instr_type_alu && - (nir_instr_as_alu(src->parent_instr)->op == nir_op_ior || - nir_instr_as_alu(src->parent_instr)->op == nir_op_iand || - nir_instr_as_alu(src->parent_instr)->op == nir_op_inot || - nir_instr_as_alu(src->parent_instr)->op == nir_op_b2i)) - return true; + if (src->parent_instr->type != nir_instr_type_alu) + return false; - return false; + nir_alu_instr *alu = nir_instr_as_alu(src->parent_instr); + switch (alu->op) { + case nir_op_ior: + case nir_op_iand: + case nir_op_inot: + case nir_op_b2i: + return true; + case nir_op_bcsel: + return src == &alu->src[0].src; + default: + return false; + } } static bool |