From: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Date: Wed, 14 Sep 2016 16:57:02 +0000 (+0200)
Subject: nv50/ir: optimize SHLADD(a, b, 0x0) to SHL(a, b)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2e008be9a9a4c94564c11718e0f6fc029caa0e44;p=mesa.git

nv50/ir: optimize SHLADD(a, b, 0x0) to SHL(a, b)

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
---

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
index c9d5b5f7d65..cbbe34d1e0b 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
@@ -907,6 +907,14 @@ ConstantFolding::opnd3(Instruction *i, ImmediateValue &imm2)
          return;
       }
       break;
+   case OP_SHLADD:
+      if (imm2.isInteger(0)) {
+         i->op = OP_SHL;
+         i->setSrc(2, NULL);
+         foldCount++;
+         return;
+      }
+      break;
    default:
       return;
    }