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Refactor code into a new method.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19635 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -567,8 +567,7 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
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assert(VT == N1.getValueType() &&
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"Shift operators return type must be the same as their first arg");
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assert(MVT::isInteger(VT) && MVT::isInteger(N2.getValueType()) &&
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"Shifts only work on integers");
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assert(VT >= MVT::i8 && "Shift amount cannot be a MVT::i1");
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VT != MVT::i1 && "Shifts only work on integers");
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break;
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default: break;
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}
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@ -806,6 +806,32 @@ CopyValueToVirtualRegister(SelectionDAGLowering &SDL, Value *V, unsigned Reg) {
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return DAG.getCopyToReg(DAG.getRoot(), Op, Reg);
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}
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void SelectionDAGISel::
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LowerArguments(BasicBlock *BB, SelectionDAGLowering &SDL,
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std::vector<SDOperand> &UnorderedChains) {
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// If this is the entry block, emit arguments.
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Function &F = *BB->getParent();
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if (BB == &F.front()) {
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// FIXME: If an argument is only used in one basic block, we could directly
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// emit it (ONLY) into that block, not emitting the COPY_TO_VREG node. This
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// would improve codegen in several cases on X86 by allowing the loads to be
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// folded into the user operation.
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std::vector<SDOperand> Args = TLI.LowerArguments(F, SDL.DAG);
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FunctionLoweringInfo &FuncInfo = SDL.FuncInfo;
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unsigned a = 0;
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for (Function::aiterator AI = F.abegin(), E = F.aend(); AI != E; ++AI,++a)
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if (!AI->use_empty()) {
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SDL.setValue(AI, Args[a]);
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UnorderedChains.push_back(
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CopyValueToVirtualRegister(SDL, AI, FuncInfo.ValueMap[AI]));
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}
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}
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}
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void SelectionDAGISel::BuildSelectionDAG(SelectionDAG &DAG, BasicBlock *LLVMBB,
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std::vector<std::pair<MachineInstr*, unsigned> > &PHINodesToUpdate,
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FunctionLoweringInfo &FuncInfo) {
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@ -813,23 +839,8 @@ void SelectionDAGISel::BuildSelectionDAG(SelectionDAG &DAG, BasicBlock *LLVMBB,
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std::vector<SDOperand> UnorderedChains;
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// If this is the entry block, emit arguments.
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Function *F = LLVMBB->getParent();
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if (LLVMBB == &F->front()) {
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// FIXME: If an argument is only used in one basic block, we could directly
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// emit it (ONLY) into that block, not emitting the COPY_TO_VREG node. This
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// would improve codegen in several cases on X86 by allowing the loads to be
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// folded into the user operation.
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std::vector<SDOperand> Args = TLI.LowerArguments(*LLVMBB->getParent(), DAG);
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unsigned a = 0;
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for (Function::aiterator AI = F->abegin(), E = F->aend(); AI != E; ++AI,++a)
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if (!AI->use_empty()) {
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SDL.setValue(AI, Args[a]);
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UnorderedChains.push_back(
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CopyValueToVirtualRegister(SDL, AI, FuncInfo.ValueMap[AI]));
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}
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}
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// Lower any arguments needed in this block.
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LowerArguments(LLVMBB, SDL, UnorderedChains);
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BB = FuncInfo.MBBMap[LLVMBB];
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SDL.setCurrentBasicBlock(BB);
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