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6ff1ef9931
This required correcting the definition of the bins[lr]i intrinsics because the result is also the first operand. It also required removing the (arbitrary) check for 32-bit immediates in MipsSEDAGToDAGISel::selectVSplat(). Currently using binsli.d with 2 bits set in the mask doesn't select binsli.d because the constant is legalized into a ConstantPool. Similar things can happen with binsri.d with more than 10 bits set in the mask. The resulting code when this happens is correct but not optimal. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193687 91177308-0d34-0410-b5e6-96231b3b80d8
129 lines
5.1 KiB
C++
129 lines
5.1 KiB
C++
//===---- MipsISelDAGToDAG.h - A Dag to Dag Inst Selector for Mips --------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines an instruction selector for the MIPS target.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MIPSISELDAGTODAG_H
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#define MIPSISELDAGTODAG_H
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#include "Mips.h"
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#include "MipsSubtarget.h"
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#include "MipsTargetMachine.h"
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#include "llvm/CodeGen/SelectionDAGISel.h"
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//===----------------------------------------------------------------------===//
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// Instruction Selector Implementation
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// MipsDAGToDAGISel - MIPS specific code to select MIPS machine
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// instructions for SelectionDAG operations.
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//===----------------------------------------------------------------------===//
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namespace llvm {
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class MipsDAGToDAGISel : public SelectionDAGISel {
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public:
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explicit MipsDAGToDAGISel(MipsTargetMachine &TM)
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: SelectionDAGISel(TM), Subtarget(TM.getSubtarget<MipsSubtarget>()) {}
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// Pass Name
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virtual const char *getPassName() const {
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return "MIPS DAG->DAG Pattern Instruction Selection";
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}
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virtual bool runOnMachineFunction(MachineFunction &MF);
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protected:
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SDNode *getGlobalBaseReg();
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/// Keep a pointer to the MipsSubtarget around so that we can make the right
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/// decision when generating code for different targets.
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const MipsSubtarget &Subtarget;
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private:
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// Include the pieces autogenerated from the target description.
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#include "MipsGenDAGISel.inc"
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// Complex Pattern.
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/// (reg + imm).
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virtual bool selectAddrRegImm(SDValue Addr, SDValue &Base,
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SDValue &Offset) const;
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// Complex Pattern.
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/// (reg + reg).
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virtual bool selectAddrRegReg(SDValue Addr, SDValue &Base,
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SDValue &Offset) const;
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/// Fall back on this function if all else fails.
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virtual bool selectAddrDefault(SDValue Addr, SDValue &Base,
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SDValue &Offset) const;
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/// Match integer address pattern.
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virtual bool selectIntAddr(SDValue Addr, SDValue &Base,
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SDValue &Offset) const;
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virtual bool selectIntAddrMM(SDValue Addr, SDValue &Base,
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SDValue &Offset) const;
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virtual bool selectAddr16(SDNode *Parent, SDValue N, SDValue &Base,
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SDValue &Offset, SDValue &Alias);
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/// \brief Select constant vector splats.
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virtual bool selectVSplat(SDNode *N, APInt &Imm) const;
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/// \brief Select constant vector splats whose value fits in a uimm1.
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virtual bool selectVSplatUimm1(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value fits in a uimm2.
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virtual bool selectVSplatUimm2(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value fits in a uimm3.
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virtual bool selectVSplatUimm3(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value fits in a uimm4.
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virtual bool selectVSplatUimm4(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value fits in a uimm5.
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virtual bool selectVSplatUimm5(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value fits in a uimm6.
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virtual bool selectVSplatUimm6(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value fits in a uimm8.
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virtual bool selectVSplatUimm8(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value fits in a simm5.
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virtual bool selectVSplatSimm5(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value is a power of 2.
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virtual bool selectVSplatUimmPow2(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value is a run of set bits
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/// ending at the most significant bit
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virtual bool selectVSplatMaskL(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value is a run of set bits
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/// starting at bit zero.
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virtual bool selectVSplatMaskR(SDValue N, SDValue &Imm) const;
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virtual SDNode *Select(SDNode *N);
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virtual std::pair<bool, SDNode*> selectNode(SDNode *Node) = 0;
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// getImm - Return a target constant with the specified value.
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inline SDValue getImm(const SDNode *Node, uint64_t Imm) {
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return CurDAG->getTargetConstant(Imm, Node->getValueType(0));
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}
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virtual void processFunctionAfterISel(MachineFunction &MF) = 0;
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virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op,
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char ConstraintCode,
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std::vector<SDValue> &OutOps);
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};
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/// createMipsISelDag - This pass converts a legalized DAG into a
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/// MIPS-specific DAG, ready for instruction scheduling.
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FunctionPass *createMipsISelDag(MipsTargetMachine &TM);
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}
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#endif
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