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aco: combine two sgprs into a VALU if they're the same 

This was supposed to be done before but it wasn't done correctly and
everywhere.

pipeline-db (Navi):
Totals from affected shaders:
SGPRS: 784680 -> 786128 (0.18 %)
VGPRS: 574012 -> 573892 (-0.02 %)
Spilled SGPRs: 461 -> 461 (0.00 %)
Spilled VGPRs: 0 -> 0 (0.00 %)
Code Size: 45477088 -> 45478172 (0.00 %) bytes
Max Waves: 81294 -> 81277 (-0.02 %)
Instructions: 8657970 -> 8622483 (-0.41 %)

pipeline-db (Vega):
Totals from affected shaders:
SGPRS: 780664 -> 782072 (0.18 %)
VGPRS: 573880 -> 573760 (-0.02 %)
Spilled SGPRs: 629 -> 629 (0.00 %)
Spilled VGPRs: 0 -> 0 (0.00 %)
Code Size: 45445244 -> 45448340 (0.01 %) bytes
Max Waves: 81178 -> 81161 (-0.02 %)
Instructions: 8649902 -> 8614918 (-0.40 %)

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/2883>
This commit is contained in:
Rhys Perry 2019-11-20 16:31:43 +00:00 committed by Marge Bot
parent c240c1aecf
commit 3cb98ed939
1 changed files with 11 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
src/amd/compiler/aco_optimizer.cpp
View File

@ -1207,13 +1207,16 @@ bool combine_ordering_test(opt_ctx &ctx, aco_ptr<Instruction>& instr)
Temp op1 = op_instr[i]->operands[1].getTemp();
if (original_temp_id(ctx, op0) != original_temp_id(ctx, op1))
return false;
/* shouldn't happen yet, but best to be safe */
if (op1.type() != RegType::vgpr)
return false;
op[i] = op1;
}
if (op[1].type() == RegType::sgpr)
std::swap(op[0], op[1]);
//TODO: we can use two different SGPRs on GFX10
if (op[0].type() == RegType::sgpr && op[1].type() == RegType::sgpr)
return false;
ctx.uses[op[0].id()]++;
ctx.uses[op[1].id()]++;
decrease_uses(ctx, op_instr[0]);
@ -1919,7 +1922,7 @@ void apply_sgprs(opt_ctx &ctx, aco_ptr<Instruction>& instr)
/* we can have two sgprs on one instruction if it is the same sgpr! */
} else if (sgpr_info_id != 0 &&
sgpr_ssa_id == sgpr_info_id &&
sgpr_ssa_id == ctx.info[sgpr_info_id].temp.id() &&
ctx.uses[sgpr_info_id] == 1 &&
can_use_VOP3(instr)) {
to_VOP3(ctx, instr);
@ -2133,6 +2136,7 @@ void combine_instruction(opt_ctx &ctx, Block& block, aco_ptr<Instruction>& instr
bool clamp = false;
bool need_vop3 = false;
int num_sgpr = 0;
unsigned cur_sgpr = 0;
op[0] = mul_instr->operands[0];
op[1] = mul_instr->operands[1];
op[2] = instr->operands[add_op_idx];
@ -2140,8 +2144,10 @@ void combine_instruction(opt_ctx &ctx, Block& block, aco_ptr<Instruction>& instr
{
if (op[i].isLiteral())
return;
if (op[i].isTemp() && op[i].getTemp().type() == RegType::sgpr)
if (op[i].isTemp() && op[i].getTemp().type() == RegType::sgpr && op[i].tempId() != cur_sgpr) {
num_sgpr++;
cur_sgpr = op[i].tempId();
}
if (!(i == 0 || (op[i].isTemp() && op[i].getTemp().type() == RegType::vgpr)))
need_vop3 = true;
}