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| author | Karol Herbst <karolherbst@gmail.com> | 2016-10-06 00:36:23 +0200 |
|---|---|---|
| committer | Samuel Pitoiset <samuel.pitoiset@gmail.com> | 2016-10-06 19:39:51 +0200 |
| commit | f96945c5b5c3a52685e76795f03f75c75fb62fc7 (patch) | |
| tree | 306c03a489c8d124ff26c6f4eed9241d26615a16 /src | |
| parent | 6963f94e98e9b0a1432bc0071d495c9e31b899ae (diff) | |
| download | external_mesa3d-f96945c5b5c3a52685e76795f03f75c75fb62fc7.zip external_mesa3d-f96945c5b5c3a52685e76795f03f75c75fb62fc7.tar.gz external_mesa3d-f96945c5b5c3a52685e76795f03f75c75fb62fc7.tar.bz2 | |
nv50/ir: optimize sub(a, 0) to a
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>
Diffstat (limited to 'src')
| -rw-r--r-- | src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp index 9875738..1c71155 100644 --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp @@ -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(); |