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aco: run opt_algebraic in a loop 

Totals from affected shaders:
SGPRS: 13920 -> 13656 (-1.90 %)
VGPRS: 12972 -> 12960 (-0.09 %)
Spilled SGPRs: 0 -> 0 (0.00 %)
Spilled VGPRs: 0 -> 0 (0.00 %)
Private memory VGPRs: 0 -> 0 (0.00 %)
Scratch size: 0 -> 0 (0.00 %) dwords per thread
Code Size: 1005680 -> 1000648 (-0.50 %) bytes
LDS: 91 -> 91 (0.00 %) blocks
Max Waves: 688 -> 688 (0.00 %)

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
This commit is contained in:
Rhys Perry 2019-10-03 17:15:34 +01:00
parent 132ae89b19
commit 73184e51d1
1 changed files with 8 additions and 3 deletions
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11
src/amd/compiler/aco_instruction_selection_setup.cpp
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@ -1331,9 +1331,14 @@ setup_isel_context(Program* program,
nir_lower_idiv(nir, nir_lower_idiv_precise);
/* optimize the lowered ALU operations */
nir_copy_prop(nir);
nir_opt_constant_folding(nir);
nir_opt_algebraic(nir);
bool more_algebraic = true;
while (more_algebraic) {
more_algebraic = false;
NIR_PASS_V(nir, nir_copy_prop);
NIR_PASS_V(nir, nir_opt_dce);
NIR_PASS_V(nir, nir_opt_constant_folding);
NIR_PASS(more_algebraic, nir, nir_opt_algebraic);
}
/* Do late algebraic optimization to turn add(a, neg(b)) back into
* subs, then the mandatory cleanup after algebraic. Note that it may