helps two alien isolation shaders
shader-db:
total instructions in shared programs : 4251497 -> 4251494 (-0.00%)
total gprs used in shared programs : 513962 -> 513962 (0.00%)
total local used in shared programs : 29797 -> 29797 (0.00%)
total bytes used in shared programs : 38960264 -> 38960232 (-0.00%)
local gpr inst bytes
helped 0 0 2 2
hurt 0 0 0 0
Signed-off-by: Karol Herbst <karolher...@gmail.com>
---
src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
index 015def0391..a2446e4df8 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
@@ -1284,6 +1284,11 @@ ConstantFolding::opnd(Instruction *i, ImmediateValue
&imm0, int s)
case OP_SHL:
{
+ if (s == 1 && imm0.isInteger(0)) {
+ i->op = OP_MOV;
+ i->setSrc(1, NULL);
+ break;
+ }
if (s != 1 || i->src(0).mod != Modifier(0))
break;
// try to concatenate shifts
--
2.12.2
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