Remove special pattern handling code from interference building

function

Change-Id: Ib03643c720c7938058f67e002bc353c4822c7149

Author: pratikashar

visa/GraphColor.cpp

@@ -1794,143 +1794,10 @@ void Interference::buildInterferenceForDst(G4_BB* bb, BitSet& live, G4_INST* ins
         {
             lrs[id]->setRefCount(lrs[id]->getRefCount() + refCount);  // update reference count
 
-            if (inst->getEvenlySplitInst() && !lrs[id]->getIsSplittedDcl())
-            {
-                std::list<G4_INST*>::reverse_iterator succ = i;
-                succ--;
-                G4_INST* nextInst = (*succ);
-                G4_DstRegRegion* nextDst = nextInst->getDst();
-
-                bool needUpdate = false;
-
-                // Perform addtional sanity checks to make sure
-                // - no temp instruction is inserted between the splitted instructions due to other HW conformity fix
-                // - no new live range is introduced by (future) value numbering optimization
-
-                if (inst->opcode() != nextInst->opcode() ||
-                    inst->getExecSize() != inst->getExecSize())
-                {
-                    needUpdate = true;
-                }
-
-                if (needUpdate == false &&
-                    nextDst != NULL &&
-                    nextDst->getBase()->isRegAllocPartaker() &&
-                    (dst->getBase()->asRegVar()->getId() !=
-                        nextDst->getBase()->asRegVar()->getId()))
-                {
-                    needUpdate = true;
-                }
-
-                if (needUpdate == false)
-                {
-                    for (unsigned j = 0; j < G4_MAX_SRCS; j++)
-                    {
-                        G4_Operand* src = inst->getSrc(j);
-                        G4_Operand* nextSrc = nextInst->getSrc(j);
-                        if (src != NULL &&
-                            src->isSrcRegRegion() &&
-                            src->asSrcRegRegion()->getBase()->isRegAllocPartaker() &&
-                            nextSrc != NULL &&
-                            nextSrc->isSrcRegRegion() &&
-                            nextSrc->asSrcRegRegion()->getBase()->isRegAllocPartaker() &&
-                            (src->asSrcRegRegion()->getBase()->asRegVar()->getId() !=
-                                nextSrc->asSrcRegRegion()->getBase()->asRegVar()->getId()))
-                        {
-                            needUpdate = true;
-                        }
-                    }
-                }
-
-                if (needUpdate)
-                {
-                    buildInterferenceWithLive(live, id);
-
-                    if (lrs[id]->getIsSplittedDcl())
-                    {
-                        buildInterferenceWithSubDcl(id, (G4_Operand *)dst, live, false, true);
-                    }
-                }
-                else
-                {
-                    if (!(builder.getOption(vISA_LocalRA) && !gra.isReRAPass()))
-                    {
-                        G4_Declare* decl = dst->getBase()->asRegVar()->getDeclare()->getRootDeclare();
-                        decl->setAlign(Even);
-                    }
-
-                    for (unsigned j = 0; j < G4_MAX_SRCS; j++)
-                    {
-                        G4_Operand* src = inst->getSrc(j);
-                        G4_Operand* nextSrc = nextInst->getSrc(j);
-                        unsigned int srcRightBound = 0;
-                        unsigned int nextSrcLeftBound = 0;
-
-                        if (src != NULL &&
-                            src->isSrcRegRegion() &&
-                            src->asSrcRegRegion()->getBase()->isRegAllocPartaker() &&
-                            nextSrc != NULL &&
-                            nextSrc->isSrcRegRegion() &&
-                            nextSrc->asSrcRegRegion()->getBase()->isRegAllocPartaker())
-                        {
-                            bool interferenceSet = false;
-
-                            if (dst->getBase()->isRegAllocPartaker() &&
-                                nextDst != NULL &&
-                                nextDst->getBase()->isRegAllocPartaker())
-                            {
-                                unsigned int dstRightBound = 0;
-                                unsigned int nextDstLeftBound = 0;
-
-                                dstRightBound = dst->getRightBound();
-                                nextDstLeftBound = nextDst->getLeftBound();
-
-                                if (dstRightBound / GENX_GRF_REG_SIZ == nextDstLeftBound / GENX_GRF_REG_SIZ)
-                                {
-                                    interferenceSet = true;
-                                    if (!varSplitCheckBeforeIntf(dst->getBase()->asRegVar()->getId(),
-                                        src->asSrcRegRegion()->getBase()->asRegVar()->getId()))
-                                    {
-                                        checkAndSetIntf(dst->getBase()->asRegVar()->getId(),
-                                            src->asSrcRegRegion()->getBase()->asRegVar()->getId());
-                                    }
-
-                                }
-                            }
-
-                            if (interferenceSet == false)
-                            {
-                                srcRightBound = src->getRightBound();
-                                nextSrcLeftBound = nextSrc->getLeftBound();
-
-                                if (srcRightBound / GENX_GRF_REG_SIZ == nextSrcLeftBound / GENX_GRF_REG_SIZ)
-                                {
-                                    if (!varSplitCheckBeforeIntf(dst->getBase()->asRegVar()->getId(),
-                                        src->asSrcRegRegion()->getBase()->asRegVar()->getId()))
-                                    {
-                                        checkAndSetIntf(dst->getBase()->asRegVar()->getId(),
-                                            src->asSrcRegRegion()->getBase()->asRegVar()->getId());
-                                    }
-                                }
-                            }
-
-
-                            if (!(builder.getOption(vISA_LocalRA) && !gra.isReRAPass()))
-                            {
-                                G4_Declare* decl = src->asSrcRegRegion()->getBase()->asRegVar()->getDeclare()->getRootDeclare();
-                                decl->setAlign(Even);
-                            }
-                        }
-                    }
-                }
-            }
-            else
+            buildInterferenceWithLive(live, id);
+            if (lrs[id]->getIsSplittedDcl())
             {
-                buildInterferenceWithLive(live, id);
-                if (lrs[id]->getIsSplittedDcl())
-                {
-                    buildInterferenceWithSubDcl(id, (G4_Operand *)dst, live, false, true);
-                }
+                buildInterferenceWithSubDcl(id, (G4_Operand *)dst, live, false, true);
             }
         }