[Autobackout][FuncReg]Revert of change: f2aff34

Reset acc0 to 0 before EOT

Change-Id: I47e5082324b11f565cd35e5ad3e92ee37a262dc8

Author: DianaChen

visa/HWCapsOpen.inc

@@ -546,9 +546,4 @@
     {
         return getGenxPlatform() >= GENX_TGLLP;
     }
-
-    bool needResetAcc0beforeEOT() const
-    {
-        return getGenxPlatform() == GENX_TGLLP;
-    }
     // end HW capabilities

visa/Optimizer.cpp

@@ -6985,14 +6985,6 @@ void Optimizer::evenlySplitInst(INST_LIST_ITER iter, G4_BB* bb)
                     bb->insert(ii, movInst);
                 }
 
-                if (inst->isEOT() && builder.needResetAcc0beforeEOT())
-                {
-                    // insert "(W) mov(16) acc0.0:f 0x0:f" before EOT
-                    G4_INST* movInst = builder.createMov(16,
-                        builder.createDstRegRegion(Direct, builder.phyregpool.getAcc0Reg(),0, 0, 1, Type_F),
-                        builder.createImm(0, Type_F), InstOpt_WriteEnable, false);
-                    bb->insert(ii, movInst);
-                }
 
                 if (VISA_WA_CHECK(builder.getPWaTable(), WaResetN0BeforeGatewayMessage) &&
                     inst->isSend() && inst->getMsgDesc()->isBarrierMsg())
@@ -7031,6 +7023,7 @@ void Optimizer::evenlySplitInst(INST_LIST_ITER iter, G4_BB* bb)
             // set A0 to tdr0 before sendc/sendsc. TGL WA
             setA0toTdrForSendc();
         }
+
     }
 
 class NSDS {