fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2025-12-25 19:30:11 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

nv50/ir: optimize sub(a, 0) to a

Browse source 
helped some ue4 demos and divinity OS shaders

total instructions in shared programs : 2818674 -> 2818606 (-0.00%)
total gprs used in shared programs    : 379273 -> 379273 (0.00%)
total local used in shared programs   : 9505 -> 9505 (0.00%)
total bytes used in shared programs   : 25837792 -> 25837192 (-0.00%)

                local        gpr       inst      bytes
    helped           0           0          33          33
      hurt           0           0           0           0

Signed-off-by: Karol Herbst <karolherbst@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Pierre Moreau <pierre.morrow@free.fr>
This commit is contained in:
Karol Herbst 2016-10-06 00:36:23 +02:00 • committed by Samuel Pitoiset
parent 6963f94e98
commit f96945c5b5
1 changed files with 3 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
View file

@ -1037,12 +1037,15 @@ ConstantFolding::opnd(Instruction *i, ImmediateValue &imm0, int s)
}
break;
case OP_ADD:
case OP_SUB:
if (i->usesFlags())
break;
if (imm0.isInteger(0)) {
if (s == 0) {
i->setSrc(0, i->getSrc(1));
i->src(0).mod = i->src(1).mod;
if (i->op == OP_SUB)
i->src(0).mod = i->src(0).mod ^ Modifier(NV50_IR_MOD_NEG);
}
i->setSrc(1, NULL);
i->op = i->src(0).mod.getOp();