2011-12-13 05:14:40 +08:00
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//===-- HexagonISelLowering.cpp - Hexagon DAG Lowering Implementation -----===//
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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 implements the interfaces that Hexagon uses to lower LLVM code
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// into a selection DAG.
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//
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//===----------------------------------------------------------------------===//
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#include "HexagonISelLowering.h"
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#include "HexagonTargetMachine.h"
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#include "HexagonMachineFunctionInfo.h"
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#include "HexagonTargetObjectFile.h"
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#include "HexagonSubtarget.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Function.h"
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#include "llvm/InlineAsm.h"
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#include "llvm/GlobalVariable.h"
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#include "llvm/GlobalAlias.h"
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#include "llvm/Intrinsics.h"
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#include "llvm/CallingConv.h"
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#include "llvm/CodeGen/CallingConvLower.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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2012-03-18 02:46:09 +08:00
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#include "llvm/CodeGen/MachineJumpTableInfo.h"
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2011-12-13 05:14:40 +08:00
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/CodeGen/SelectionDAGISel.h"
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#include "llvm/CodeGen/ValueTypes.h"
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2012-04-21 23:31:36 +08:00
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#include "llvm/Support/CommandLine.h"
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2011-12-13 05:14:40 +08:00
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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2012-04-21 23:31:45 +08:00
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#include "llvm/Support/raw_ostream.h"
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2012-04-21 23:31:36 +08:00
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2012-03-18 02:46:09 +08:00
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using namespace llvm;
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2011-12-13 05:14:40 +08:00
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const unsigned Hexagon_MAX_RET_SIZE = 64;
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static cl::opt<bool>
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EmitJumpTables("hexagon-emit-jump-tables", cl::init(true), cl::Hidden,
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cl::desc("Control jump table emission on Hexagon target"));
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int NumNamedVarArgParams = -1;
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// Implement calling convention for Hexagon.
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static bool
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CC_Hexagon(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State);
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static bool
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CC_Hexagon32(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State);
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static bool
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CC_Hexagon64(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State);
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static bool
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RetCC_Hexagon(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State);
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static bool
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RetCC_Hexagon32(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State);
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static bool
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RetCC_Hexagon64(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State);
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static bool
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CC_Hexagon_VarArg (unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State) {
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// NumNamedVarArgParams can not be zero for a VarArg function.
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assert ( (NumNamedVarArgParams > 0) &&
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"NumNamedVarArgParams is not bigger than zero.");
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if ( (int)ValNo < NumNamedVarArgParams ) {
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// Deal with named arguments.
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return CC_Hexagon(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State);
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}
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// Deal with un-named arguments.
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unsigned ofst;
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if (ArgFlags.isByVal()) {
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// If pass-by-value, the size allocated on stack is decided
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// by ArgFlags.getByValSize(), not by the size of LocVT.
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assert ((ArgFlags.getByValSize() > 8) &&
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"ByValSize must be bigger than 8 bytes");
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ofst = State.AllocateStack(ArgFlags.getByValSize(), 4);
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, ofst, LocVT, LocInfo));
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return false;
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}
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if (LocVT == MVT::i32 || LocVT == MVT::f32) {
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2011-12-13 05:14:40 +08:00
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ofst = State.AllocateStack(4, 4);
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, ofst, LocVT, LocInfo));
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return false;
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}
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if (LocVT == MVT::i64 || LocVT == MVT::f64) {
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2011-12-13 05:14:40 +08:00
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ofst = State.AllocateStack(8, 8);
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, ofst, LocVT, LocInfo));
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return false;
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}
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llvm_unreachable(0);
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}
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static bool
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CC_Hexagon (unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State) {
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if (ArgFlags.isByVal()) {
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// Passed on stack.
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assert ((ArgFlags.getByValSize() > 8) &&
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"ByValSize must be bigger than 8 bytes");
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unsigned Offset = State.AllocateStack(ArgFlags.getByValSize(), 4);
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
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return false;
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}
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if (LocVT == MVT::i1 || LocVT == MVT::i8 || LocVT == MVT::i16) {
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LocVT = MVT::i32;
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ValVT = MVT::i32;
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if (ArgFlags.isSExt())
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LocInfo = CCValAssign::SExt;
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else if (ArgFlags.isZExt())
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LocInfo = CCValAssign::ZExt;
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else
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LocInfo = CCValAssign::AExt;
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}
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2012-05-11 04:20:25 +08:00
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if (LocVT == MVT::i32 || LocVT == MVT::f32) {
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2011-12-13 05:14:40 +08:00
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if (!CC_Hexagon32(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State))
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return false;
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}
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2012-05-11 04:20:25 +08:00
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if (LocVT == MVT::i64 || LocVT == MVT::f64) {
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2011-12-13 05:14:40 +08:00
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if (!CC_Hexagon64(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State))
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return false;
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}
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return true; // CC didn't match.
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}
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static bool CC_Hexagon32(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State) {
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2012-03-11 15:57:25 +08:00
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static const uint16_t RegList[] = {
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2011-12-13 05:14:40 +08:00
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Hexagon::R0, Hexagon::R1, Hexagon::R2, Hexagon::R3, Hexagon::R4,
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Hexagon::R5
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};
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if (unsigned Reg = State.AllocateReg(RegList, 6)) {
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State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo));
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return false;
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}
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unsigned Offset = State.AllocateStack(4, 4);
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
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return false;
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}
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static bool CC_Hexagon64(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State) {
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if (unsigned Reg = State.AllocateReg(Hexagon::D0)) {
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State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo));
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return false;
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}
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2012-03-11 15:57:25 +08:00
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static const uint16_t RegList1[] = {
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Hexagon::D1, Hexagon::D2
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};
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static const uint16_t RegList2[] = {
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Hexagon::R1, Hexagon::R3
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};
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if (unsigned Reg = State.AllocateReg(RegList1, RegList2, 2)) {
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State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo));
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return false;
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}
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unsigned Offset = State.AllocateStack(8, 8, Hexagon::D2);
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
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return false;
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}
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static bool RetCC_Hexagon(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State) {
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if (LocVT == MVT::i1 ||
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LocVT == MVT::i8 ||
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LocVT == MVT::i16) {
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LocVT = MVT::i32;
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ValVT = MVT::i32;
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if (ArgFlags.isSExt())
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LocInfo = CCValAssign::SExt;
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else if (ArgFlags.isZExt())
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LocInfo = CCValAssign::ZExt;
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else
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LocInfo = CCValAssign::AExt;
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}
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2012-05-11 04:20:25 +08:00
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if (LocVT == MVT::i32 || LocVT == MVT::f32) {
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2011-12-13 05:14:40 +08:00
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if (!RetCC_Hexagon32(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State))
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return false;
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}
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2012-05-11 04:20:25 +08:00
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if (LocVT == MVT::i64 || LocVT == MVT::f64) {
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2011-12-13 05:14:40 +08:00
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if (!RetCC_Hexagon64(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State))
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return false;
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}
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return true; // CC didn't match.
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}
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static bool RetCC_Hexagon32(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State) {
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2012-05-11 04:20:25 +08:00
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if (LocVT == MVT::i32 || LocVT == MVT::f32) {
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2011-12-13 05:14:40 +08:00
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if (unsigned Reg = State.AllocateReg(Hexagon::R0)) {
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State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo));
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return false;
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}
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}
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unsigned Offset = State.AllocateStack(4, 4);
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
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return false;
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}
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static bool RetCC_Hexagon64(unsigned ValNo, MVT ValVT,
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MVT LocVT, CCValAssign::LocInfo LocInfo,
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ISD::ArgFlagsTy ArgFlags, CCState &State) {
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if (LocVT == MVT::i64 || LocVT == MVT::f64) {
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if (unsigned Reg = State.AllocateReg(Hexagon::D0)) {
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State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo));
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return false;
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}
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}
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unsigned Offset = State.AllocateStack(8, 8);
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State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
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return false;
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}
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SDValue
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HexagonTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG)
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const {
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return SDValue();
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}
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/// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
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/// by "Src" to address "Dst" of size "Size". Alignment information is
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/// specified by the specific parameter attribute. The copy will be passed as
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/// a byval function parameter. Sometimes what we are copying is the end of a
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/// larger object, the part that does not fit in registers.
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static SDValue
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CreateCopyOfByValArgument(SDValue Src, SDValue Dst, SDValue Chain,
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ISD::ArgFlagsTy Flags, SelectionDAG &DAG,
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DebugLoc dl) {
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SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
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return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
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/*isVolatile=*/false, /*AlwaysInline=*/false,
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MachinePointerInfo(), MachinePointerInfo());
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}
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// LowerReturn - Lower ISD::RET. If a struct is larger than 8 bytes and is
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// passed by value, the function prototype is modified to return void and
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// the value is stored in memory pointed by a pointer passed by caller.
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SDValue
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HexagonTargetLowering::LowerReturn(SDValue Chain,
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CallingConv::ID CallConv, bool isVarArg,
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const SmallVectorImpl<ISD::OutputArg> &Outs,
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const SmallVectorImpl<SDValue> &OutVals,
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DebugLoc dl, SelectionDAG &DAG) const {
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// CCValAssign - represent the assignment of the return value to locations.
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SmallVector<CCValAssign, 16> RVLocs;
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// CCState - Info about the registers and stack slot.
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CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
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getTargetMachine(), RVLocs, *DAG.getContext());
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// Analyze return values of ISD::RET
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CCInfo.AnalyzeReturn(Outs, RetCC_Hexagon);
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// If this is the first return lowered for this function, add the regs to the
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// liveout set for the function.
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if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
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for (unsigned i = 0; i != RVLocs.size(); ++i)
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if (RVLocs[i].isRegLoc())
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DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
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}
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SDValue Flag;
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// Copy the result values into the output registers.
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for (unsigned i = 0; i != RVLocs.size(); ++i) {
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CCValAssign &VA = RVLocs[i];
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Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), OutVals[i], Flag);
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// Guarantee that all emitted copies are stuck together with flags.
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Flag = Chain.getValue(1);
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}
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if (Flag.getNode())
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return DAG.getNode(HexagonISD::RET_FLAG, dl, MVT::Other, Chain, Flag);
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return DAG.getNode(HexagonISD::RET_FLAG, dl, MVT::Other, Chain);
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|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/// LowerCallResult - Lower the result values of an ISD::CALL into the
|
|
|
|
/// appropriate copies out of appropriate physical registers. This assumes that
|
|
|
|
/// Chain/InFlag are the input chain/flag to use, and that TheCall is the call
|
|
|
|
/// being lowered. Returns a SDNode with the same number of values as the
|
|
|
|
/// ISD::CALL.
|
|
|
|
SDValue
|
|
|
|
HexagonTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
|
|
|
|
CallingConv::ID CallConv, bool isVarArg,
|
|
|
|
const
|
|
|
|
SmallVectorImpl<ISD::InputArg> &Ins,
|
|
|
|
DebugLoc dl, SelectionDAG &DAG,
|
|
|
|
SmallVectorImpl<SDValue> &InVals,
|
|
|
|
const SmallVectorImpl<SDValue> &OutVals,
|
|
|
|
SDValue Callee) const {
|
|
|
|
|
|
|
|
// Assign locations to each value returned by this call.
|
|
|
|
SmallVector<CCValAssign, 16> RVLocs;
|
|
|
|
|
|
|
|
CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
|
|
|
|
getTargetMachine(), RVLocs, *DAG.getContext());
|
|
|
|
|
|
|
|
CCInfo.AnalyzeCallResult(Ins, RetCC_Hexagon);
|
|
|
|
|
|
|
|
// Copy all of the result registers out of their specified physreg.
|
|
|
|
for (unsigned i = 0; i != RVLocs.size(); ++i) {
|
|
|
|
Chain = DAG.getCopyFromReg(Chain, dl,
|
|
|
|
RVLocs[i].getLocReg(),
|
|
|
|
RVLocs[i].getValVT(), InFlag).getValue(1);
|
|
|
|
InFlag = Chain.getValue(2);
|
|
|
|
InVals.push_back(Chain.getValue(0));
|
|
|
|
}
|
|
|
|
|
|
|
|
return Chain;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// LowerCall - Functions arguments are copied from virtual regs to
|
|
|
|
/// (physical regs)/(stack frame), CALLSEQ_START and CALLSEQ_END are emitted.
|
|
|
|
SDValue
|
2012-05-26 00:35:28 +08:00
|
|
|
HexagonTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
|
2011-12-13 05:14:40 +08:00
|
|
|
SmallVectorImpl<SDValue> &InVals) const {
|
2012-05-26 00:35:28 +08:00
|
|
|
SelectionDAG &DAG = CLI.DAG;
|
|
|
|
DebugLoc &dl = CLI.DL;
|
|
|
|
SmallVector<ISD::OutputArg, 32> &Outs = CLI.Outs;
|
|
|
|
SmallVector<SDValue, 32> &OutVals = CLI.OutVals;
|
|
|
|
SmallVector<ISD::InputArg, 32> &Ins = CLI.Ins;
|
|
|
|
SDValue Chain = CLI.Chain;
|
|
|
|
SDValue Callee = CLI.Callee;
|
|
|
|
bool &isTailCall = CLI.IsTailCall;
|
|
|
|
CallingConv::ID CallConv = CLI.CallConv;
|
|
|
|
bool isVarArg = CLI.IsVarArg;
|
2011-12-13 05:14:40 +08:00
|
|
|
|
|
|
|
bool IsStructRet = (Outs.empty()) ? false : Outs[0].Flags.isSRet();
|
|
|
|
|
|
|
|
// Analyze operands of the call, assigning locations to each operand.
|
|
|
|
SmallVector<CCValAssign, 16> ArgLocs;
|
|
|
|
CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
|
|
|
|
getTargetMachine(), ArgLocs, *DAG.getContext());
|
|
|
|
|
|
|
|
// Check for varargs.
|
|
|
|
NumNamedVarArgParams = -1;
|
|
|
|
if (GlobalAddressSDNode *GA = dyn_cast<GlobalAddressSDNode>(Callee))
|
|
|
|
{
|
|
|
|
const Function* CalleeFn = NULL;
|
|
|
|
Callee = DAG.getTargetGlobalAddress(GA->getGlobal(), dl, MVT::i32);
|
|
|
|
if ((CalleeFn = dyn_cast<Function>(GA->getGlobal())))
|
|
|
|
{
|
|
|
|
// If a function has zero args and is a vararg function, that's
|
|
|
|
// disallowed so it must be an undeclared function. Do not assume
|
|
|
|
// varargs if the callee is undefined.
|
|
|
|
if (CalleeFn->isVarArg() &&
|
|
|
|
CalleeFn->getFunctionType()->getNumParams() != 0) {
|
|
|
|
NumNamedVarArgParams = CalleeFn->getFunctionType()->getNumParams();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (NumNamedVarArgParams > 0)
|
|
|
|
CCInfo.AnalyzeCallOperands(Outs, CC_Hexagon_VarArg);
|
|
|
|
else
|
|
|
|
CCInfo.AnalyzeCallOperands(Outs, CC_Hexagon);
|
|
|
|
|
|
|
|
|
|
|
|
if(isTailCall) {
|
|
|
|
bool StructAttrFlag =
|
|
|
|
DAG.getMachineFunction().getFunction()->hasStructRetAttr();
|
|
|
|
isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
|
|
|
|
isVarArg, IsStructRet,
|
|
|
|
StructAttrFlag,
|
|
|
|
Outs, OutVals, Ins, DAG);
|
|
|
|
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i){
|
|
|
|
CCValAssign &VA = ArgLocs[i];
|
|
|
|
if (VA.isMemLoc()) {
|
|
|
|
isTailCall = false;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (isTailCall) {
|
|
|
|
DEBUG(dbgs () << "Eligible for Tail Call\n");
|
|
|
|
} else {
|
|
|
|
DEBUG(dbgs () <<
|
|
|
|
"Argument must be passed on stack. Not eligible for Tail Call\n");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// Get a count of how many bytes are to be pushed on the stack.
|
|
|
|
unsigned NumBytes = CCInfo.getNextStackOffset();
|
|
|
|
SmallVector<std::pair<unsigned, SDValue>, 16> RegsToPass;
|
|
|
|
SmallVector<SDValue, 8> MemOpChains;
|
|
|
|
|
|
|
|
SDValue StackPtr =
|
|
|
|
DAG.getCopyFromReg(Chain, dl, TM.getRegisterInfo()->getStackRegister(),
|
|
|
|
getPointerTy());
|
|
|
|
|
|
|
|
// Walk the register/memloc assignments, inserting copies/loads.
|
|
|
|
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
|
|
|
|
CCValAssign &VA = ArgLocs[i];
|
|
|
|
SDValue Arg = OutVals[i];
|
|
|
|
ISD::ArgFlagsTy Flags = Outs[i].Flags;
|
|
|
|
|
|
|
|
// Promote the value if needed.
|
|
|
|
switch (VA.getLocInfo()) {
|
|
|
|
default:
|
|
|
|
// Loc info must be one of Full, SExt, ZExt, or AExt.
|
2012-02-07 10:50:20 +08:00
|
|
|
llvm_unreachable("Unknown loc info!");
|
2011-12-13 05:14:40 +08:00
|
|
|
case CCValAssign::Full:
|
|
|
|
break;
|
|
|
|
case CCValAssign::SExt:
|
|
|
|
Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg);
|
|
|
|
break;
|
|
|
|
case CCValAssign::ZExt:
|
|
|
|
Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg);
|
|
|
|
break;
|
|
|
|
case CCValAssign::AExt:
|
|
|
|
Arg = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), Arg);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (VA.isMemLoc()) {
|
|
|
|
unsigned LocMemOffset = VA.getLocMemOffset();
|
|
|
|
SDValue PtrOff = DAG.getConstant(LocMemOffset, StackPtr.getValueType());
|
|
|
|
PtrOff = DAG.getNode(ISD::ADD, dl, MVT::i32, StackPtr, PtrOff);
|
|
|
|
|
|
|
|
if (Flags.isByVal()) {
|
|
|
|
// The argument is a struct passed by value. According to LLVM, "Arg"
|
|
|
|
// is is pointer.
|
|
|
|
MemOpChains.push_back(CreateCopyOfByValArgument(Arg, PtrOff, Chain,
|
|
|
|
Flags, DAG, dl));
|
|
|
|
} else {
|
|
|
|
// The argument is not passed by value. "Arg" is a buildin type. It is
|
|
|
|
// not a pointer.
|
|
|
|
MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, PtrOff,
|
|
|
|
MachinePointerInfo(),false, false,
|
|
|
|
0));
|
|
|
|
}
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Arguments that can be passed on register must be kept at RegsToPass
|
|
|
|
// vector.
|
|
|
|
if (VA.isRegLoc()) {
|
|
|
|
RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Transform all store nodes into one single node because all store
|
|
|
|
// nodes are independent of each other.
|
|
|
|
if (!MemOpChains.empty()) {
|
|
|
|
Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &MemOpChains[0],
|
|
|
|
MemOpChains.size());
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!isTailCall)
|
|
|
|
Chain = DAG.getCALLSEQ_START(Chain, DAG.getConstant(NumBytes,
|
|
|
|
getPointerTy(), true));
|
|
|
|
|
|
|
|
// Build a sequence of copy-to-reg nodes chained together with token
|
|
|
|
// chain and flag operands which copy the outgoing args into registers.
|
2012-06-02 18:20:22 +08:00
|
|
|
// The InFlag in necessary since all emitted instructions must be
|
2011-12-13 05:14:40 +08:00
|
|
|
// stuck together.
|
|
|
|
SDValue InFlag;
|
|
|
|
if (!isTailCall) {
|
|
|
|
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
|
|
|
|
Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
|
|
|
|
RegsToPass[i].second, InFlag);
|
|
|
|
InFlag = Chain.getValue(1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// For tail calls lower the arguments to the 'real' stack slot.
|
|
|
|
if (isTailCall) {
|
|
|
|
// Force all the incoming stack arguments to be loaded from the stack
|
|
|
|
// before any new outgoing arguments are stored to the stack, because the
|
|
|
|
// outgoing stack slots may alias the incoming argument stack slots, and
|
|
|
|
// the alias isn't otherwise explicit. This is slightly more conservative
|
|
|
|
// than necessary, because it means that each store effectively depends
|
|
|
|
// on every argument instead of just those arguments it would clobber.
|
|
|
|
//
|
2012-06-02 18:20:22 +08:00
|
|
|
// Do not flag preceding copytoreg stuff together with the following stuff.
|
2011-12-13 05:14:40 +08:00
|
|
|
InFlag = SDValue();
|
|
|
|
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
|
|
|
|
Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
|
|
|
|
RegsToPass[i].second, InFlag);
|
|
|
|
InFlag = Chain.getValue(1);
|
|
|
|
}
|
|
|
|
InFlag =SDValue();
|
|
|
|
}
|
|
|
|
|
|
|
|
// If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
|
|
|
|
// direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
|
|
|
|
// node so that legalize doesn't hack it.
|
|
|
|
if (flag_aligned_memcpy) {
|
|
|
|
const char *MemcpyName =
|
|
|
|
"__hexagon_memcpy_likely_aligned_min32bytes_mult8bytes";
|
|
|
|
Callee =
|
|
|
|
DAG.getTargetExternalSymbol(MemcpyName, getPointerTy());
|
|
|
|
flag_aligned_memcpy = false;
|
|
|
|
} else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
|
|
|
|
Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl, getPointerTy());
|
|
|
|
} else if (ExternalSymbolSDNode *S =
|
|
|
|
dyn_cast<ExternalSymbolSDNode>(Callee)) {
|
|
|
|
Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Returns a chain & a flag for retval copy to use.
|
|
|
|
SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
|
|
|
|
SmallVector<SDValue, 8> Ops;
|
|
|
|
Ops.push_back(Chain);
|
|
|
|
Ops.push_back(Callee);
|
|
|
|
|
|
|
|
// Add argument registers to the end of the list so that they are
|
|
|
|
// known live into the call.
|
|
|
|
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
|
|
|
|
Ops.push_back(DAG.getRegister(RegsToPass[i].first,
|
|
|
|
RegsToPass[i].second.getValueType()));
|
|
|
|
}
|
|
|
|
|
|
|
|
if (InFlag.getNode()) {
|
|
|
|
Ops.push_back(InFlag);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (isTailCall)
|
|
|
|
return DAG.getNode(HexagonISD::TC_RETURN, dl, NodeTys, &Ops[0], Ops.size());
|
|
|
|
|
|
|
|
Chain = DAG.getNode(HexagonISD::CALL, dl, NodeTys, &Ops[0], Ops.size());
|
|
|
|
InFlag = Chain.getValue(1);
|
|
|
|
|
|
|
|
// Create the CALLSEQ_END node.
|
|
|
|
Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
|
|
|
|
DAG.getIntPtrConstant(0, true), InFlag);
|
|
|
|
InFlag = Chain.getValue(1);
|
|
|
|
|
|
|
|
// Handle result values, copying them out of physregs into vregs that we
|
|
|
|
// return.
|
|
|
|
return LowerCallResult(Chain, InFlag, CallConv, isVarArg, Ins, dl, DAG,
|
|
|
|
InVals, OutVals, Callee);
|
|
|
|
}
|
|
|
|
|
|
|
|
static bool getIndexedAddressParts(SDNode *Ptr, EVT VT,
|
|
|
|
bool isSEXTLoad, SDValue &Base,
|
|
|
|
SDValue &Offset, bool &isInc,
|
|
|
|
SelectionDAG &DAG) {
|
|
|
|
if (Ptr->getOpcode() != ISD::ADD)
|
|
|
|
return false;
|
|
|
|
|
|
|
|
if (VT == MVT::i64 || VT == MVT::i32 || VT == MVT::i16 || VT == MVT::i8) {
|
|
|
|
isInc = (Ptr->getOpcode() == ISD::ADD);
|
|
|
|
Base = Ptr->getOperand(0);
|
|
|
|
Offset = Ptr->getOperand(1);
|
|
|
|
// Ensure that Offset is a constant.
|
|
|
|
return (isa<ConstantSDNode>(Offset));
|
|
|
|
}
|
|
|
|
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
// TODO: Put this function along with the other isS* functions in
|
|
|
|
// HexagonISelDAGToDAG.cpp into a common file. Or better still, use the
|
|
|
|
// functions defined in HexagonImmediates.td.
|
|
|
|
static bool Is_PostInc_S4_Offset(SDNode * S, int ShiftAmount) {
|
|
|
|
ConstantSDNode *N = cast<ConstantSDNode>(S);
|
|
|
|
|
|
|
|
// immS4 predicate - True if the immediate fits in a 4-bit sign extended.
|
|
|
|
// field.
|
|
|
|
int64_t v = (int64_t)N->getSExtValue();
|
|
|
|
int64_t m = 0;
|
|
|
|
if (ShiftAmount > 0) {
|
|
|
|
m = v % ShiftAmount;
|
|
|
|
v = v >> ShiftAmount;
|
|
|
|
}
|
|
|
|
return (v <= 7) && (v >= -8) && (m == 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/// getPostIndexedAddressParts - returns true by value, base pointer and
|
|
|
|
/// offset pointer and addressing mode by reference if this node can be
|
|
|
|
/// combined with a load / store to form a post-indexed load / store.
|
|
|
|
bool HexagonTargetLowering::getPostIndexedAddressParts(SDNode *N, SDNode *Op,
|
|
|
|
SDValue &Base,
|
|
|
|
SDValue &Offset,
|
|
|
|
ISD::MemIndexedMode &AM,
|
|
|
|
SelectionDAG &DAG) const
|
|
|
|
{
|
|
|
|
EVT VT;
|
|
|
|
SDValue Ptr;
|
|
|
|
bool isSEXTLoad = false;
|
|
|
|
|
|
|
|
if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
|
|
|
|
VT = LD->getMemoryVT();
|
|
|
|
isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
|
|
|
|
} else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
|
|
|
|
VT = ST->getMemoryVT();
|
|
|
|
if (ST->getValue().getValueType() == MVT::i64 && ST->isTruncatingStore()) {
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
2012-01-07 04:11:59 +08:00
|
|
|
bool isInc = false;
|
2011-12-13 05:14:40 +08:00
|
|
|
bool isLegal = getIndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
|
|
|
|
isInc, DAG);
|
|
|
|
// ShiftAmount = number of left-shifted bits in the Hexagon instruction.
|
|
|
|
int ShiftAmount = VT.getSizeInBits() / 16;
|
|
|
|
if (isLegal && Is_PostInc_S4_Offset(Offset.getNode(), ShiftAmount)) {
|
|
|
|
AM = isInc ? ISD::POST_INC : ISD::POST_DEC;
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
SDValue HexagonTargetLowering::LowerINLINEASM(SDValue Op,
|
|
|
|
SelectionDAG &DAG) const {
|
|
|
|
SDNode *Node = Op.getNode();
|
|
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
|
|
HexagonMachineFunctionInfo *FuncInfo =
|
|
|
|
MF.getInfo<HexagonMachineFunctionInfo>();
|
|
|
|
switch (Node->getOpcode()) {
|
|
|
|
case ISD::INLINEASM: {
|
|
|
|
unsigned NumOps = Node->getNumOperands();
|
|
|
|
if (Node->getOperand(NumOps-1).getValueType() == MVT::Glue)
|
|
|
|
--NumOps; // Ignore the flag operand.
|
|
|
|
|
|
|
|
for (unsigned i = InlineAsm::Op_FirstOperand; i != NumOps;) {
|
|
|
|
if (FuncInfo->hasClobberLR())
|
|
|
|
break;
|
|
|
|
unsigned Flags =
|
|
|
|
cast<ConstantSDNode>(Node->getOperand(i))->getZExtValue();
|
|
|
|
unsigned NumVals = InlineAsm::getNumOperandRegisters(Flags);
|
|
|
|
++i; // Skip the ID value.
|
|
|
|
|
|
|
|
switch (InlineAsm::getKind(Flags)) {
|
|
|
|
default: llvm_unreachable("Bad flags!");
|
|
|
|
case InlineAsm::Kind_RegDef:
|
|
|
|
case InlineAsm::Kind_RegUse:
|
|
|
|
case InlineAsm::Kind_Imm:
|
|
|
|
case InlineAsm::Kind_Clobber:
|
|
|
|
case InlineAsm::Kind_Mem: {
|
|
|
|
for (; NumVals; --NumVals, ++i) {}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case InlineAsm::Kind_RegDefEarlyClobber: {
|
|
|
|
for (; NumVals; --NumVals, ++i) {
|
|
|
|
unsigned Reg =
|
|
|
|
cast<RegisterSDNode>(Node->getOperand(i))->getReg();
|
|
|
|
|
|
|
|
// Check it to be lr
|
|
|
|
if (Reg == TM.getRegisterInfo()->getRARegister()) {
|
|
|
|
FuncInfo->setHasClobberLR(true);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} // Node->getOpcode
|
|
|
|
return Op;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
// Taken from the XCore backend.
|
|
|
|
//
|
|
|
|
SDValue HexagonTargetLowering::
|
|
|
|
LowerBR_JT(SDValue Op, SelectionDAG &DAG) const
|
|
|
|
{
|
|
|
|
SDValue Chain = Op.getOperand(0);
|
|
|
|
SDValue Table = Op.getOperand(1);
|
|
|
|
SDValue Index = Op.getOperand(2);
|
|
|
|
DebugLoc dl = Op.getDebugLoc();
|
|
|
|
JumpTableSDNode *JT = cast<JumpTableSDNode>(Table);
|
|
|
|
unsigned JTI = JT->getIndex();
|
|
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
|
|
const MachineJumpTableInfo *MJTI = MF.getJumpTableInfo();
|
|
|
|
SDValue TargetJT = DAG.getTargetJumpTable(JT->getIndex(), MVT::i32);
|
|
|
|
|
|
|
|
// Mark all jump table targets as address taken.
|
|
|
|
const std::vector<MachineJumpTableEntry> &JTE = MJTI->getJumpTables();
|
|
|
|
const std::vector<MachineBasicBlock*> &JTBBs = JTE[JTI].MBBs;
|
|
|
|
for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
|
|
|
|
MachineBasicBlock *MBB = JTBBs[i];
|
|
|
|
MBB->setHasAddressTaken();
|
|
|
|
// This line is needed to set the hasAddressTaken flag on the BasicBlock
|
|
|
|
// object.
|
|
|
|
BlockAddress::get(const_cast<BasicBlock *>(MBB->getBasicBlock()));
|
|
|
|
}
|
|
|
|
|
|
|
|
SDValue JumpTableBase = DAG.getNode(HexagonISD::WrapperJT, dl,
|
|
|
|
getPointerTy(), TargetJT);
|
|
|
|
SDValue ShiftIndex = DAG.getNode(ISD::SHL, dl, MVT::i32, Index,
|
|
|
|
DAG.getConstant(2, MVT::i32));
|
|
|
|
SDValue JTAddress = DAG.getNode(ISD::ADD, dl, MVT::i32, JumpTableBase,
|
|
|
|
ShiftIndex);
|
|
|
|
SDValue LoadTarget = DAG.getLoad(MVT::i32, dl, Chain, JTAddress,
|
|
|
|
MachinePointerInfo(), false, false, false,
|
|
|
|
0);
|
|
|
|
return DAG.getNode(HexagonISD::BR_JT, dl, MVT::Other, Chain, LoadTarget);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
SDValue
|
|
|
|
HexagonTargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
|
|
|
|
SelectionDAG &DAG) const {
|
|
|
|
SDValue Chain = Op.getOperand(0);
|
|
|
|
SDValue Size = Op.getOperand(1);
|
|
|
|
DebugLoc dl = Op.getDebugLoc();
|
|
|
|
|
|
|
|
unsigned SPReg = getStackPointerRegisterToSaveRestore();
|
|
|
|
|
|
|
|
// Get a reference to the stack pointer.
|
|
|
|
SDValue StackPointer = DAG.getCopyFromReg(Chain, dl, SPReg, MVT::i32);
|
|
|
|
|
|
|
|
// Subtract the dynamic size from the actual stack size to
|
|
|
|
// obtain the new stack size.
|
|
|
|
SDValue Sub = DAG.getNode(ISD::SUB, dl, MVT::i32, StackPointer, Size);
|
|
|
|
|
|
|
|
//
|
|
|
|
// For Hexagon, the outgoing memory arguments area should be on top of the
|
|
|
|
// alloca area on the stack i.e., the outgoing memory arguments should be
|
|
|
|
// at a lower address than the alloca area. Move the alloca area down the
|
|
|
|
// stack by adding back the space reserved for outgoing arguments to SP
|
|
|
|
// here.
|
|
|
|
//
|
|
|
|
// We do not know what the size of the outgoing args is at this point.
|
|
|
|
// So, we add a pseudo instruction ADJDYNALLOC that will adjust the
|
|
|
|
// stack pointer. We patch this instruction with the correct, known
|
|
|
|
// offset in emitPrologue().
|
|
|
|
//
|
|
|
|
// Use a placeholder immediate (zero) for now. This will be patched up
|
|
|
|
// by emitPrologue().
|
|
|
|
SDValue ArgAdjust = DAG.getNode(HexagonISD::ADJDYNALLOC, dl,
|
|
|
|
MVT::i32,
|
|
|
|
Sub,
|
|
|
|
DAG.getConstant(0, MVT::i32));
|
|
|
|
|
|
|
|
// The Sub result contains the new stack start address, so it
|
|
|
|
// must be placed in the stack pointer register.
|
|
|
|
SDValue CopyChain = DAG.getCopyToReg(Chain, dl,
|
|
|
|
TM.getRegisterInfo()->getStackRegister(),
|
|
|
|
Sub);
|
|
|
|
|
|
|
|
SDValue Ops[2] = { ArgAdjust, CopyChain };
|
|
|
|
return DAG.getMergeValues(Ops, 2, dl);
|
|
|
|
}
|
|
|
|
|
|
|
|
SDValue
|
|
|
|
HexagonTargetLowering::LowerFormalArguments(SDValue Chain,
|
|
|
|
CallingConv::ID CallConv,
|
|
|
|
bool isVarArg,
|
|
|
|
const
|
|
|
|
SmallVectorImpl<ISD::InputArg> &Ins,
|
|
|
|
DebugLoc dl, SelectionDAG &DAG,
|
|
|
|
SmallVectorImpl<SDValue> &InVals)
|
|
|
|
const {
|
|
|
|
|
|
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
|
|
MachineFrameInfo *MFI = MF.getFrameInfo();
|
|
|
|
MachineRegisterInfo &RegInfo = MF.getRegInfo();
|
|
|
|
HexagonMachineFunctionInfo *FuncInfo =
|
|
|
|
MF.getInfo<HexagonMachineFunctionInfo>();
|
|
|
|
|
|
|
|
|
|
|
|
// Assign locations to all of the incoming arguments.
|
|
|
|
SmallVector<CCValAssign, 16> ArgLocs;
|
|
|
|
CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
|
|
|
|
getTargetMachine(), ArgLocs, *DAG.getContext());
|
|
|
|
|
|
|
|
CCInfo.AnalyzeFormalArguments(Ins, CC_Hexagon);
|
|
|
|
|
|
|
|
// For LLVM, in the case when returning a struct by value (>8byte),
|
|
|
|
// the first argument is a pointer that points to the location on caller's
|
|
|
|
// stack where the return value will be stored. For Hexagon, the location on
|
|
|
|
// caller's stack is passed only when the struct size is smaller than (and
|
|
|
|
// equal to) 8 bytes. If not, no address will be passed into callee and
|
|
|
|
// callee return the result direclty through R0/R1.
|
|
|
|
|
|
|
|
SmallVector<SDValue, 4> MemOps;
|
|
|
|
|
|
|
|
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
|
|
|
|
CCValAssign &VA = ArgLocs[i];
|
|
|
|
ISD::ArgFlagsTy Flags = Ins[i].Flags;
|
|
|
|
unsigned ObjSize;
|
|
|
|
unsigned StackLocation;
|
|
|
|
int FI;
|
|
|
|
|
|
|
|
if ( (VA.isRegLoc() && !Flags.isByVal())
|
|
|
|
|| (VA.isRegLoc() && Flags.isByVal() && Flags.getByValSize() > 8)) {
|
|
|
|
// Arguments passed in registers
|
|
|
|
// 1. int, long long, ptr args that get allocated in register.
|
|
|
|
// 2. Large struct that gets an register to put its address in.
|
|
|
|
EVT RegVT = VA.getLocVT();
|
2012-05-11 04:20:25 +08:00
|
|
|
if (RegVT == MVT::i8 || RegVT == MVT::i16 ||
|
|
|
|
RegVT == MVT::i32 || RegVT == MVT::f32) {
|
2011-12-13 05:14:40 +08:00
|
|
|
unsigned VReg =
|
2012-04-20 15:30:17 +08:00
|
|
|
RegInfo.createVirtualRegister(&Hexagon::IntRegsRegClass);
|
2011-12-13 05:14:40 +08:00
|
|
|
RegInfo.addLiveIn(VA.getLocReg(), VReg);
|
|
|
|
InVals.push_back(DAG.getCopyFromReg(Chain, dl, VReg, RegVT));
|
2012-04-19 05:31:19 +08:00
|
|
|
} else if (RegVT == MVT::i64) {
|
2011-12-13 05:14:40 +08:00
|
|
|
unsigned VReg =
|
2012-04-20 15:30:17 +08:00
|
|
|
RegInfo.createVirtualRegister(&Hexagon::DoubleRegsRegClass);
|
2011-12-13 05:14:40 +08:00
|
|
|
RegInfo.addLiveIn(VA.getLocReg(), VReg);
|
|
|
|
InVals.push_back(DAG.getCopyFromReg(Chain, dl, VReg, RegVT));
|
|
|
|
} else {
|
|
|
|
assert (0);
|
|
|
|
}
|
|
|
|
} else if (VA.isRegLoc() && Flags.isByVal() && Flags.getByValSize() <= 8) {
|
|
|
|
assert (0 && "ByValSize must be bigger than 8 bytes");
|
|
|
|
} else {
|
|
|
|
// Sanity check.
|
|
|
|
assert(VA.isMemLoc());
|
|
|
|
|
|
|
|
if (Flags.isByVal()) {
|
|
|
|
// If it's a byval parameter, then we need to compute the
|
|
|
|
// "real" size, not the size of the pointer.
|
|
|
|
ObjSize = Flags.getByValSize();
|
|
|
|
} else {
|
|
|
|
ObjSize = VA.getLocVT().getStoreSizeInBits() >> 3;
|
|
|
|
}
|
|
|
|
|
|
|
|
StackLocation = HEXAGON_LRFP_SIZE + VA.getLocMemOffset();
|
|
|
|
// Create the frame index object for this incoming parameter...
|
|
|
|
FI = MFI->CreateFixedObject(ObjSize, StackLocation, true);
|
|
|
|
|
|
|
|
// Create the SelectionDAG nodes cordl, responding to a load
|
|
|
|
// from this parameter.
|
|
|
|
SDValue FIN = DAG.getFrameIndex(FI, MVT::i32);
|
|
|
|
|
|
|
|
if (Flags.isByVal()) {
|
|
|
|
// If it's a pass-by-value aggregate, then do not dereference the stack
|
|
|
|
// location. Instead, we should generate a reference to the stack
|
|
|
|
// location.
|
|
|
|
InVals.push_back(FIN);
|
|
|
|
} else {
|
|
|
|
InVals.push_back(DAG.getLoad(VA.getLocVT(), dl, Chain, FIN,
|
|
|
|
MachinePointerInfo(), false, false,
|
|
|
|
false, 0));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!MemOps.empty())
|
|
|
|
Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &MemOps[0],
|
|
|
|
MemOps.size());
|
|
|
|
|
|
|
|
if (isVarArg) {
|
|
|
|
// This will point to the next argument passed via stack.
|
|
|
|
int FrameIndex = MFI->CreateFixedObject(Hexagon_PointerSize,
|
|
|
|
HEXAGON_LRFP_SIZE +
|
|
|
|
CCInfo.getNextStackOffset(),
|
|
|
|
true);
|
|
|
|
FuncInfo->setVarArgsFrameIndex(FrameIndex);
|
|
|
|
}
|
|
|
|
|
|
|
|
return Chain;
|
|
|
|
}
|
|
|
|
|
|
|
|
SDValue
|
|
|
|
HexagonTargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
|
|
|
|
// VASTART stores the address of the VarArgsFrameIndex slot into the
|
|
|
|
// memory location argument.
|
|
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
|
|
HexagonMachineFunctionInfo *QFI = MF.getInfo<HexagonMachineFunctionInfo>();
|
|
|
|
SDValue Addr = DAG.getFrameIndex(QFI->getVarArgsFrameIndex(), MVT::i32);
|
|
|
|
const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
|
|
|
|
return DAG.getStore(Op.getOperand(0), Op.getDebugLoc(), Addr,
|
|
|
|
Op.getOperand(1), MachinePointerInfo(SV), false,
|
|
|
|
false, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
SDValue
|
|
|
|
HexagonTargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const {
|
2012-05-11 04:20:25 +08:00
|
|
|
SDValue LHS = Op.getOperand(0);
|
|
|
|
SDValue RHS = Op.getOperand(1);
|
|
|
|
SDValue CC = Op.getOperand(4);
|
|
|
|
SDValue TrueVal = Op.getOperand(2);
|
|
|
|
SDValue FalseVal = Op.getOperand(3);
|
|
|
|
DebugLoc dl = Op.getDebugLoc();
|
2011-12-13 05:14:40 +08:00
|
|
|
SDNode* OpNode = Op.getNode();
|
2012-05-11 04:20:25 +08:00
|
|
|
EVT SVT = OpNode->getValueType(0);
|
|
|
|
|
|
|
|
SDValue Cond = DAG.getNode(ISD::SETCC, dl, MVT::i1, LHS, RHS, CC);
|
|
|
|
return DAG.getNode(ISD::SELECT, dl, SVT, Cond, TrueVal, FalseVal);
|
|
|
|
}
|
|
|
|
|
|
|
|
SDValue
|
|
|
|
HexagonTargetLowering::LowerConstantPool(SDValue Op, SelectionDAG &DAG) const {
|
|
|
|
EVT ValTy = Op.getValueType();
|
2012-04-17 01:05:06 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
DebugLoc dl = Op.getDebugLoc();
|
|
|
|
ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
|
|
|
|
SDValue Res;
|
|
|
|
if (CP->isMachineConstantPoolEntry())
|
|
|
|
Res = DAG.getTargetConstantPool(CP->getMachineCPVal(), ValTy,
|
|
|
|
CP->getAlignment());
|
|
|
|
else
|
|
|
|
Res = DAG.getTargetConstantPool(CP->getConstVal(), ValTy,
|
|
|
|
CP->getAlignment());
|
|
|
|
return DAG.getNode(HexagonISD::CONST32, dl, ValTy, Res);
|
2011-12-13 05:14:40 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
SDValue
|
|
|
|
HexagonTargetLowering::LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const {
|
|
|
|
const TargetRegisterInfo *TRI = TM.getRegisterInfo();
|
|
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
|
|
MachineFrameInfo *MFI = MF.getFrameInfo();
|
|
|
|
MFI->setReturnAddressIsTaken(true);
|
|
|
|
|
|
|
|
EVT VT = Op.getValueType();
|
|
|
|
DebugLoc dl = Op.getDebugLoc();
|
|
|
|
unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
|
|
|
|
if (Depth) {
|
|
|
|
SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
|
|
|
|
SDValue Offset = DAG.getConstant(4, MVT::i32);
|
|
|
|
return DAG.getLoad(VT, dl, DAG.getEntryNode(),
|
|
|
|
DAG.getNode(ISD::ADD, dl, VT, FrameAddr, Offset),
|
|
|
|
MachinePointerInfo(), false, false, false, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Return LR, which contains the return address. Mark it an implicit live-in.
|
|
|
|
unsigned Reg = MF.addLiveIn(TRI->getRARegister(), getRegClassFor(MVT::i32));
|
|
|
|
return DAG.getCopyFromReg(DAG.getEntryNode(), dl, Reg, VT);
|
|
|
|
}
|
|
|
|
|
|
|
|
SDValue
|
|
|
|
HexagonTargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
|
|
|
|
const HexagonRegisterInfo *TRI = TM.getRegisterInfo();
|
|
|
|
MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
|
|
|
|
MFI->setFrameAddressIsTaken(true);
|
|
|
|
|
|
|
|
EVT VT = Op.getValueType();
|
|
|
|
DebugLoc dl = Op.getDebugLoc();
|
|
|
|
unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
|
|
|
|
SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
|
|
|
|
TRI->getFrameRegister(), VT);
|
|
|
|
while (Depth--)
|
|
|
|
FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
|
|
|
|
MachinePointerInfo(),
|
|
|
|
false, false, false, 0);
|
|
|
|
return FrameAddr;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
SDValue HexagonTargetLowering::LowerMEMBARRIER(SDValue Op,
|
|
|
|
SelectionDAG& DAG) const {
|
|
|
|
DebugLoc dl = Op.getDebugLoc();
|
|
|
|
return DAG.getNode(HexagonISD::BARRIER, dl, MVT::Other, Op.getOperand(0));
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
SDValue HexagonTargetLowering::LowerATOMIC_FENCE(SDValue Op,
|
|
|
|
SelectionDAG& DAG) const {
|
|
|
|
DebugLoc dl = Op.getDebugLoc();
|
|
|
|
return DAG.getNode(HexagonISD::BARRIER, dl, MVT::Other, Op.getOperand(0));
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
SDValue HexagonTargetLowering::LowerGLOBALADDRESS(SDValue Op,
|
|
|
|
SelectionDAG &DAG) const {
|
|
|
|
SDValue Result;
|
|
|
|
const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
|
|
|
|
int64_t Offset = cast<GlobalAddressSDNode>(Op)->getOffset();
|
|
|
|
DebugLoc dl = Op.getDebugLoc();
|
|
|
|
Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), Offset);
|
|
|
|
|
|
|
|
HexagonTargetObjectFile &TLOF =
|
|
|
|
(HexagonTargetObjectFile&)getObjFileLowering();
|
|
|
|
if (TLOF.IsGlobalInSmallSection(GV, getTargetMachine())) {
|
|
|
|
return DAG.getNode(HexagonISD::CONST32_GP, dl, getPointerTy(), Result);
|
|
|
|
}
|
|
|
|
|
|
|
|
return DAG.getNode(HexagonISD::CONST32, dl, getPointerTy(), Result);
|
|
|
|
}
|
|
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// TargetLowering Implementation
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
|
|
|
HexagonTargetLowering::HexagonTargetLowering(HexagonTargetMachine
|
|
|
|
&targetmachine)
|
|
|
|
: TargetLowering(targetmachine, new HexagonTargetObjectFile()),
|
|
|
|
TM(targetmachine) {
|
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
const HexagonRegisterInfo* QRI = TM.getRegisterInfo();
|
|
|
|
|
2011-12-13 05:14:40 +08:00
|
|
|
// Set up the register classes.
|
2012-04-20 15:30:17 +08:00
|
|
|
addRegisterClass(MVT::i32, &Hexagon::IntRegsRegClass);
|
|
|
|
addRegisterClass(MVT::i64, &Hexagon::DoubleRegsRegClass);
|
2011-12-13 05:14:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
if (QRI->Subtarget.hasV5TOps()) {
|
|
|
|
addRegisterClass(MVT::f32, &Hexagon::IntRegsRegClass);
|
|
|
|
addRegisterClass(MVT::f64, &Hexagon::DoubleRegsRegClass);
|
|
|
|
}
|
|
|
|
|
2012-04-20 15:30:17 +08:00
|
|
|
addRegisterClass(MVT::i1, &Hexagon::PredRegsRegClass);
|
2011-12-13 05:14:40 +08:00
|
|
|
|
|
|
|
computeRegisterProperties();
|
|
|
|
|
|
|
|
// Align loop entry
|
|
|
|
setPrefLoopAlignment(4);
|
|
|
|
|
|
|
|
// Limits for inline expansion of memcpy/memmove
|
|
|
|
maxStoresPerMemcpy = 6;
|
|
|
|
maxStoresPerMemmove = 6;
|
|
|
|
|
|
|
|
//
|
|
|
|
// Library calls for unsupported operations
|
|
|
|
//
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::SINTTOFP_I128_F64, "__hexagon_floattidf");
|
|
|
|
setLibcallName(RTLIB::SINTTOFP_I128_F32, "__hexagon_floattisf");
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::FPTOUINT_F32_I128, "__hexagon_fixunssfti");
|
|
|
|
setLibcallName(RTLIB::FPTOUINT_F64_I128, "__hexagon_fixunsdfti");
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::FPTOSINT_F32_I128, "__hexagon_fixsfti");
|
|
|
|
setLibcallName(RTLIB::FPTOSINT_F64_I128, "__hexagon_fixdfti");
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::SDIV_I32, "__hexagon_divsi3");
|
|
|
|
setOperationAction(ISD::SDIV, MVT::i32, Expand);
|
|
|
|
setLibcallName(RTLIB::SREM_I32, "__hexagon_umodsi3");
|
|
|
|
setOperationAction(ISD::SREM, MVT::i32, Expand);
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::SDIV_I64, "__hexagon_divdi3");
|
|
|
|
setOperationAction(ISD::SDIV, MVT::i64, Expand);
|
|
|
|
setLibcallName(RTLIB::SREM_I64, "__hexagon_moddi3");
|
|
|
|
setOperationAction(ISD::SREM, MVT::i64, Expand);
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::UDIV_I32, "__hexagon_udivsi3");
|
|
|
|
setOperationAction(ISD::UDIV, MVT::i32, Expand);
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::UDIV_I64, "__hexagon_udivdi3");
|
|
|
|
setOperationAction(ISD::UDIV, MVT::i64, Expand);
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::UREM_I32, "__hexagon_umodsi3");
|
|
|
|
setOperationAction(ISD::UREM, MVT::i32, Expand);
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::UREM_I64, "__hexagon_umoddi3");
|
|
|
|
setOperationAction(ISD::UREM, MVT::i64, Expand);
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::DIV_F32, "__hexagon_divsf3");
|
|
|
|
setOperationAction(ISD::FDIV, MVT::f32, Expand);
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::DIV_F64, "__hexagon_divdf3");
|
|
|
|
setOperationAction(ISD::FDIV, MVT::f64, Expand);
|
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setOperationAction(ISD::FSQRT, MVT::f32, Expand);
|
|
|
|
setOperationAction(ISD::FSQRT, MVT::f64, Expand);
|
|
|
|
setOperationAction(ISD::FSIN, MVT::f32, Expand);
|
|
|
|
setOperationAction(ISD::FSIN, MVT::f64, Expand);
|
|
|
|
|
|
|
|
if (QRI->Subtarget.hasV5TOps()) {
|
|
|
|
// Hexagon V5 Support.
|
|
|
|
setOperationAction(ISD::FADD, MVT::f32, Legal);
|
|
|
|
setOperationAction(ISD::FADD, MVT::f64, Legal);
|
|
|
|
setOperationAction(ISD::FP_EXTEND, MVT::f32, Legal);
|
|
|
|
setCondCodeAction(ISD::SETOEQ, MVT::f32, Legal);
|
|
|
|
setCondCodeAction(ISD::SETOEQ, MVT::f64, Legal);
|
|
|
|
setCondCodeAction(ISD::SETUEQ, MVT::f32, Legal);
|
|
|
|
setCondCodeAction(ISD::SETUEQ, MVT::f64, Legal);
|
|
|
|
|
|
|
|
setCondCodeAction(ISD::SETOGE, MVT::f32, Legal);
|
|
|
|
setCondCodeAction(ISD::SETOGE, MVT::f64, Legal);
|
|
|
|
setCondCodeAction(ISD::SETUGE, MVT::f32, Legal);
|
|
|
|
setCondCodeAction(ISD::SETUGE, MVT::f64, Legal);
|
|
|
|
|
|
|
|
setCondCodeAction(ISD::SETOGT, MVT::f32, Legal);
|
|
|
|
setCondCodeAction(ISD::SETOGT, MVT::f64, Legal);
|
|
|
|
setCondCodeAction(ISD::SETUGT, MVT::f32, Legal);
|
|
|
|
setCondCodeAction(ISD::SETUGT, MVT::f64, Legal);
|
|
|
|
|
|
|
|
setCondCodeAction(ISD::SETOLE, MVT::f32, Legal);
|
|
|
|
setCondCodeAction(ISD::SETOLE, MVT::f64, Legal);
|
|
|
|
setCondCodeAction(ISD::SETOLT, MVT::f32, Legal);
|
|
|
|
setCondCodeAction(ISD::SETOLT, MVT::f64, Legal);
|
|
|
|
|
|
|
|
setOperationAction(ISD::ConstantFP, MVT::f32, Legal);
|
|
|
|
setOperationAction(ISD::ConstantFP, MVT::f64, Legal);
|
|
|
|
|
|
|
|
setOperationAction(ISD::FP_TO_UINT, MVT::i1, Promote);
|
|
|
|
setOperationAction(ISD::FP_TO_SINT, MVT::i1, Promote);
|
|
|
|
setOperationAction(ISD::UINT_TO_FP, MVT::i1, Promote);
|
|
|
|
setOperationAction(ISD::SINT_TO_FP, MVT::i1, Promote);
|
|
|
|
|
|
|
|
setOperationAction(ISD::FP_TO_UINT, MVT::i8, Promote);
|
|
|
|
setOperationAction(ISD::FP_TO_SINT, MVT::i8, Promote);
|
|
|
|
setOperationAction(ISD::UINT_TO_FP, MVT::i8, Promote);
|
|
|
|
setOperationAction(ISD::SINT_TO_FP, MVT::i8, Promote);
|
|
|
|
|
|
|
|
setOperationAction(ISD::FP_TO_UINT, MVT::i16, Promote);
|
|
|
|
setOperationAction(ISD::FP_TO_SINT, MVT::i16, Promote);
|
|
|
|
setOperationAction(ISD::UINT_TO_FP, MVT::i16, Promote);
|
|
|
|
setOperationAction(ISD::SINT_TO_FP, MVT::i16, Promote);
|
|
|
|
|
|
|
|
setOperationAction(ISD::FP_TO_UINT, MVT::i32, Legal);
|
|
|
|
setOperationAction(ISD::FP_TO_SINT, MVT::i32, Legal);
|
|
|
|
setOperationAction(ISD::UINT_TO_FP, MVT::i32, Legal);
|
|
|
|
setOperationAction(ISD::SINT_TO_FP, MVT::i32, Legal);
|
|
|
|
|
|
|
|
setOperationAction(ISD::FP_TO_UINT, MVT::i64, Legal);
|
|
|
|
setOperationAction(ISD::FP_TO_SINT, MVT::i64, Legal);
|
|
|
|
setOperationAction(ISD::UINT_TO_FP, MVT::i64, Legal);
|
|
|
|
setOperationAction(ISD::SINT_TO_FP, MVT::i64, Legal);
|
|
|
|
|
|
|
|
setOperationAction(ISD::FABS, MVT::f32, Legal);
|
|
|
|
setOperationAction(ISD::FABS, MVT::f64, Expand);
|
|
|
|
|
|
|
|
setOperationAction(ISD::FNEG, MVT::f32, Legal);
|
|
|
|
setOperationAction(ISD::FNEG, MVT::f64, Expand);
|
|
|
|
} else {
|
2011-12-13 05:14:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
// Expand fp<->uint.
|
|
|
|
setOperationAction(ISD::FP_TO_SINT, MVT::i32, Expand);
|
|
|
|
setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
|
2011-12-13 05:14:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setOperationAction(ISD::SINT_TO_FP, MVT::i32, Expand);
|
|
|
|
setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand);
|
2011-12-13 05:14:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::SINTTOFP_I64_F32, "__hexagon_floatdisf");
|
|
|
|
setLibcallName(RTLIB::UINTTOFP_I64_F32, "__hexagon_floatundisf");
|
2012-04-17 01:05:06 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::UINTTOFP_I32_F32, "__hexagon_floatunsisf");
|
|
|
|
setLibcallName(RTLIB::SINTTOFP_I32_F32, "__hexagon_floatsisf");
|
2012-04-17 01:05:06 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::SINTTOFP_I64_F64, "__hexagon_floatdidf");
|
|
|
|
setLibcallName(RTLIB::UINTTOFP_I64_F64, "__hexagon_floatundidf");
|
2012-04-17 01:05:06 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::UINTTOFP_I32_F64, "__hexagon_floatunsidf");
|
|
|
|
setLibcallName(RTLIB::SINTTOFP_I32_F64, "__hexagon_floatsidf");
|
2012-04-17 01:05:06 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::FPTOUINT_F32_I32, "__hexagon_fixunssfsi");
|
|
|
|
setLibcallName(RTLIB::FPTOUINT_F32_I64, "__hexagon_fixunssfdi");
|
2011-12-13 05:14:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::FPTOSINT_F64_I64, "__hexagon_fixdfdi");
|
|
|
|
setLibcallName(RTLIB::FPTOSINT_F32_I64, "__hexagon_fixsfdi");
|
2011-12-13 05:14:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::FPTOUINT_F64_I32, "__hexagon_fixunsdfsi");
|
|
|
|
setLibcallName(RTLIB::FPTOUINT_F64_I64, "__hexagon_fixunsdfdi");
|
2012-04-24 01:49:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::ADD_F64, "__hexagon_adddf3");
|
|
|
|
setOperationAction(ISD::FADD, MVT::f64, Expand);
|
2012-04-24 01:49:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::ADD_F32, "__hexagon_addsf3");
|
|
|
|
setOperationAction(ISD::FADD, MVT::f32, Expand);
|
2012-04-24 01:49:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::FPEXT_F32_F64, "__hexagon_extendsfdf2");
|
|
|
|
setOperationAction(ISD::FP_EXTEND, MVT::f32, Expand);
|
2012-04-24 01:49:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::OEQ_F32, "__hexagon_eqsf2");
|
|
|
|
setCondCodeAction(ISD::SETOEQ, MVT::f32, Expand);
|
2012-04-24 01:49:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::OEQ_F64, "__hexagon_eqdf2");
|
|
|
|
setCondCodeAction(ISD::SETOEQ, MVT::f64, Expand);
|
2011-12-13 05:14:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::OGE_F32, "__hexagon_gesf2");
|
|
|
|
setCondCodeAction(ISD::SETOGE, MVT::f32, Expand);
|
2011-12-13 05:14:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::OGE_F64, "__hexagon_gedf2");
|
|
|
|
setCondCodeAction(ISD::SETOGE, MVT::f64, Expand);
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::OGT_F32, "__hexagon_gtsf2");
|
|
|
|
setCondCodeAction(ISD::SETOGT, MVT::f32, Expand);
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::OGT_F64, "__hexagon_gtdf2");
|
|
|
|
setCondCodeAction(ISD::SETOGT, MVT::f64, Expand);
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::FPTOSINT_F64_I32, "__hexagon_fixdfsi");
|
|
|
|
setOperationAction(ISD::FP_TO_SINT, MVT::f64, Expand);
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::FPTOSINT_F32_I32, "__hexagon_fixsfsi");
|
|
|
|
setOperationAction(ISD::FP_TO_SINT, MVT::f32, Expand);
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::OLE_F64, "__hexagon_ledf2");
|
|
|
|
setCondCodeAction(ISD::SETOLE, MVT::f64, Expand);
|
2011-12-13 05:14:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::OLE_F32, "__hexagon_lesf2");
|
|
|
|
setCondCodeAction(ISD::SETOLE, MVT::f32, Expand);
|
2011-12-13 05:14:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::OLT_F64, "__hexagon_ltdf2");
|
|
|
|
setCondCodeAction(ISD::SETOLT, MVT::f64, Expand);
|
2011-12-13 05:14:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::OLT_F32, "__hexagon_ltsf2");
|
|
|
|
setCondCodeAction(ISD::SETOLT, MVT::f32, Expand);
|
2011-12-13 05:14:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::MUL_F64, "__hexagon_muldf3");
|
|
|
|
setOperationAction(ISD::FMUL, MVT::f64, Expand);
|
2011-12-13 05:14:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::MUL_F32, "__hexagon_mulsf3");
|
|
|
|
setOperationAction(ISD::MUL, MVT::f32, Expand);
|
2011-12-13 05:14:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::UNE_F64, "__hexagon_nedf2");
|
|
|
|
setCondCodeAction(ISD::SETUNE, MVT::f64, Expand);
|
2011-12-13 05:14:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::UNE_F32, "__hexagon_nesf2");
|
2012-04-17 01:05:06 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::SUB_F64, "__hexagon_subdf3");
|
|
|
|
setOperationAction(ISD::SUB, MVT::f64, Expand);
|
2012-04-17 01:05:06 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::SUB_F32, "__hexagon_subsf3");
|
|
|
|
setOperationAction(ISD::SUB, MVT::f32, Expand);
|
2012-04-17 01:05:06 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::FPROUND_F64_F32, "__hexagon_truncdfsf2");
|
|
|
|
setOperationAction(ISD::FP_ROUND, MVT::f64, Expand);
|
2012-04-17 01:05:06 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::UO_F64, "__hexagon_unorddf2");
|
|
|
|
setCondCodeAction(ISD::SETUO, MVT::f64, Expand);
|
2012-04-24 01:49:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::O_F64, "__hexagon_unorddf2");
|
|
|
|
setCondCodeAction(ISD::SETO, MVT::f64, Expand);
|
2012-04-24 01:49:40 +08:00
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
setLibcallName(RTLIB::O_F32, "__hexagon_unordsf2");
|
|
|
|
setCondCodeAction(ISD::SETO, MVT::f32, Expand);
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::UO_F32, "__hexagon_unordsf2");
|
|
|
|
setCondCodeAction(ISD::SETUO, MVT::f32, Expand);
|
|
|
|
|
|
|
|
setOperationAction(ISD::FABS, MVT::f32, Expand);
|
|
|
|
setOperationAction(ISD::FABS, MVT::f64, Expand);
|
|
|
|
setOperationAction(ISD::FNEG, MVT::f32, Expand);
|
|
|
|
setOperationAction(ISD::FNEG, MVT::f64, Expand);
|
|
|
|
}
|
|
|
|
|
|
|
|
setLibcallName(RTLIB::SREM_I32, "__hexagon_modsi3");
|
|
|
|
setOperationAction(ISD::SREM, MVT::i32, Expand);
|
2011-12-13 05:14:40 +08:00
|
|
|
|
|
|
|
setIndexedLoadAction(ISD::POST_INC, MVT::i8, Legal);
|
|
|
|
setIndexedLoadAction(ISD::POST_INC, MVT::i16, Legal);
|
|
|
|
setIndexedLoadAction(ISD::POST_INC, MVT::i32, Legal);
|
|
|
|
setIndexedLoadAction(ISD::POST_INC, MVT::i64, Legal);
|
|
|
|
|
|
|
|
setIndexedStoreAction(ISD::POST_INC, MVT::i8, Legal);
|
|
|
|
setIndexedStoreAction(ISD::POST_INC, MVT::i16, Legal);
|
|
|
|
setIndexedStoreAction(ISD::POST_INC, MVT::i32, Legal);
|
|
|
|
setIndexedStoreAction(ISD::POST_INC, MVT::i64, Legal);
|
|
|
|
|
|
|
|
setOperationAction(ISD::BUILD_PAIR, MVT::i64, Expand);
|
|
|
|
|
|
|
|
// Turn FP extload into load/fextend.
|
|
|
|
setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
|
|
|
|
// Hexagon has a i1 sign extending load.
|
|
|
|
setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Expand);
|
|
|
|
// Turn FP truncstore into trunc + store.
|
|
|
|
setTruncStoreAction(MVT::f64, MVT::f32, Expand);
|
|
|
|
|
|
|
|
// Custom legalize GlobalAddress nodes into CONST32.
|
|
|
|
setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
|
|
|
|
setOperationAction(ISD::GlobalAddress, MVT::i8, Custom);
|
|
|
|
// Truncate action?
|
|
|
|
setOperationAction(ISD::TRUNCATE, MVT::i64, Expand);
|
|
|
|
|
|
|
|
// Hexagon doesn't have sext_inreg, replace them with shl/sra.
|
|
|
|
setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
|
|
|
|
|
|
|
|
// Hexagon has no REM or DIVREM operations.
|
|
|
|
setOperationAction(ISD::UREM, MVT::i32, Expand);
|
|
|
|
setOperationAction(ISD::SREM, MVT::i32, Expand);
|
|
|
|
setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
|
|
|
|
setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
|
|
|
|
setOperationAction(ISD::SREM, MVT::i64, Expand);
|
|
|
|
setOperationAction(ISD::SDIVREM, MVT::i64, Expand);
|
|
|
|
setOperationAction(ISD::UDIVREM, MVT::i64, Expand);
|
|
|
|
|
|
|
|
setOperationAction(ISD::BSWAP, MVT::i64, Expand);
|
|
|
|
|
|
|
|
// Lower SELECT_CC to SETCC and SELECT.
|
|
|
|
setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
|
|
|
|
setOperationAction(ISD::SELECT_CC, MVT::i64, Custom);
|
2012-05-11 04:20:25 +08:00
|
|
|
|
|
|
|
if (QRI->Subtarget.hasV5TOps()) {
|
|
|
|
|
|
|
|
// We need to make the operation type of SELECT node to be Custom,
|
|
|
|
// such that we don't go into the infinite loop of
|
|
|
|
// select -> setcc -> select_cc -> select loop.
|
|
|
|
setOperationAction(ISD::SELECT, MVT::f32, Custom);
|
|
|
|
setOperationAction(ISD::SELECT, MVT::f64, Custom);
|
|
|
|
|
|
|
|
setOperationAction(ISD::SELECT_CC, MVT::f32, Expand);
|
|
|
|
setOperationAction(ISD::SELECT_CC, MVT::f64, Expand);
|
|
|
|
setOperationAction(ISD::SELECT_CC, MVT::Other, Expand);
|
|
|
|
|
|
|
|
} else {
|
|
|
|
|
|
|
|
// Hexagon has no select or setcc: expand to SELECT_CC.
|
|
|
|
setOperationAction(ISD::SELECT, MVT::f32, Expand);
|
|
|
|
setOperationAction(ISD::SELECT, MVT::f64, Expand);
|
|
|
|
|
|
|
|
// This is a workaround documented in DAGCombiner.cpp:2892 We don't
|
|
|
|
// support SELECT_CC on every type.
|
|
|
|
setOperationAction(ISD::SELECT_CC, MVT::Other, Expand);
|
|
|
|
|
|
|
|
}
|
2011-12-13 05:14:40 +08:00
|
|
|
|
|
|
|
setOperationAction(ISD::BR_CC, MVT::Other, Expand);
|
|
|
|
setOperationAction(ISD::BRIND, MVT::Other, Expand);
|
|
|
|
if (EmitJumpTables) {
|
|
|
|
setOperationAction(ISD::BR_JT, MVT::Other, Custom);
|
|
|
|
} else {
|
|
|
|
setOperationAction(ISD::BR_JT, MVT::Other, Expand);
|
|
|
|
}
|
|
|
|
|
|
|
|
setOperationAction(ISD::BR_CC, MVT::i32, Expand);
|
|
|
|
|
|
|
|
setOperationAction(ISD::MEMBARRIER, MVT::Other, Custom);
|
|
|
|
setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Custom);
|
|
|
|
|
|
|
|
setOperationAction(ISD::FSIN , MVT::f64, Expand);
|
|
|
|
setOperationAction(ISD::FCOS , MVT::f64, Expand);
|
|
|
|
setOperationAction(ISD::FREM , MVT::f64, Expand);
|
|
|
|
setOperationAction(ISD::FSIN , MVT::f32, Expand);
|
|
|
|
setOperationAction(ISD::FCOS , MVT::f32, Expand);
|
|
|
|
setOperationAction(ISD::FREM , MVT::f32, Expand);
|
|
|
|
setOperationAction(ISD::CTPOP, MVT::i32, Expand);
|
|
|
|
setOperationAction(ISD::CTTZ , MVT::i32, Expand);
|
2011-12-13 09:56:10 +08:00
|
|
|
setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32, Expand);
|
2011-12-13 05:14:40 +08:00
|
|
|
setOperationAction(ISD::CTLZ , MVT::i32, Expand);
|
2011-12-13 09:56:10 +08:00
|
|
|
setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32, Expand);
|
2011-12-13 05:14:40 +08:00
|
|
|
setOperationAction(ISD::ROTL , MVT::i32, Expand);
|
|
|
|
setOperationAction(ISD::ROTR , MVT::i32, Expand);
|
|
|
|
setOperationAction(ISD::BSWAP, MVT::i32, Expand);
|
|
|
|
setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
|
|
|
|
setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
|
|
|
|
setOperationAction(ISD::FPOW , MVT::f64, Expand);
|
|
|
|
setOperationAction(ISD::FPOW , MVT::f32, Expand);
|
|
|
|
|
|
|
|
setOperationAction(ISD::SHL_PARTS, MVT::i32, Expand);
|
|
|
|
setOperationAction(ISD::SRA_PARTS, MVT::i32, Expand);
|
|
|
|
setOperationAction(ISD::SRL_PARTS, MVT::i32, Expand);
|
|
|
|
|
|
|
|
setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
|
|
|
|
setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
|
|
|
|
|
|
|
|
setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand);
|
|
|
|
setOperationAction(ISD::UMUL_LOHI, MVT::i64, Expand);
|
|
|
|
|
|
|
|
setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
|
|
|
|
setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
|
|
|
|
setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
|
|
|
|
setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
|
|
|
|
|
|
|
|
setOperationAction(ISD::EH_RETURN, MVT::Other, Expand);
|
|
|
|
|
|
|
|
if (TM.getSubtargetImpl()->isSubtargetV2()) {
|
|
|
|
setExceptionPointerRegister(Hexagon::R20);
|
|
|
|
setExceptionSelectorRegister(Hexagon::R21);
|
|
|
|
} else {
|
|
|
|
setExceptionPointerRegister(Hexagon::R0);
|
|
|
|
setExceptionSelectorRegister(Hexagon::R1);
|
|
|
|
}
|
|
|
|
|
|
|
|
// VASTART needs to be custom lowered to use the VarArgsFrameIndex.
|
|
|
|
setOperationAction(ISD::VASTART , MVT::Other, Custom);
|
|
|
|
|
|
|
|
// Use the default implementation.
|
|
|
|
setOperationAction(ISD::VAARG , MVT::Other, Expand);
|
|
|
|
setOperationAction(ISD::VACOPY , MVT::Other, Expand);
|
|
|
|
setOperationAction(ISD::VAEND , MVT::Other, Expand);
|
|
|
|
setOperationAction(ISD::STACKSAVE , MVT::Other, Expand);
|
|
|
|
setOperationAction(ISD::STACKRESTORE , MVT::Other, Expand);
|
|
|
|
|
|
|
|
|
|
|
|
setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Custom);
|
|
|
|
setOperationAction(ISD::INLINEASM , MVT::Other, Custom);
|
|
|
|
|
|
|
|
setMinFunctionAlignment(2);
|
|
|
|
|
|
|
|
// Needed for DYNAMIC_STACKALLOC expansion.
|
|
|
|
unsigned StackRegister = TM.getRegisterInfo()->getStackRegister();
|
|
|
|
setStackPointerRegisterToSaveRestore(StackRegister);
|
2012-02-02 06:13:57 +08:00
|
|
|
setSchedulingPreference(Sched::VLIW);
|
2011-12-13 05:14:40 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
const char*
|
|
|
|
HexagonTargetLowering::getTargetNodeName(unsigned Opcode) const {
|
|
|
|
switch (Opcode) {
|
|
|
|
default: return 0;
|
2012-05-11 04:20:25 +08:00
|
|
|
case HexagonISD::CONST32: return "HexagonISD::CONST32";
|
2011-12-13 05:14:40 +08:00
|
|
|
case HexagonISD::ADJDYNALLOC: return "HexagonISD::ADJDYNALLOC";
|
2012-05-11 04:20:25 +08:00
|
|
|
case HexagonISD::CMPICC: return "HexagonISD::CMPICC";
|
|
|
|
case HexagonISD::CMPFCC: return "HexagonISD::CMPFCC";
|
|
|
|
case HexagonISD::BRICC: return "HexagonISD::BRICC";
|
|
|
|
case HexagonISD::BRFCC: return "HexagonISD::BRFCC";
|
|
|
|
case HexagonISD::SELECT_ICC: return "HexagonISD::SELECT_ICC";
|
|
|
|
case HexagonISD::SELECT_FCC: return "HexagonISD::SELECT_FCC";
|
|
|
|
case HexagonISD::Hi: return "HexagonISD::Hi";
|
|
|
|
case HexagonISD::Lo: return "HexagonISD::Lo";
|
|
|
|
case HexagonISD::FTOI: return "HexagonISD::FTOI";
|
|
|
|
case HexagonISD::ITOF: return "HexagonISD::ITOF";
|
|
|
|
case HexagonISD::CALL: return "HexagonISD::CALL";
|
|
|
|
case HexagonISD::RET_FLAG: return "HexagonISD::RET_FLAG";
|
|
|
|
case HexagonISD::BR_JT: return "HexagonISD::BR_JT";
|
|
|
|
case HexagonISD::TC_RETURN: return "HexagonISD::TC_RETURN";
|
2011-12-13 05:14:40 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
bool
|
|
|
|
HexagonTargetLowering::isTruncateFree(Type *Ty1, Type *Ty2) const {
|
|
|
|
EVT MTy1 = EVT::getEVT(Ty1);
|
|
|
|
EVT MTy2 = EVT::getEVT(Ty2);
|
|
|
|
if (!MTy1.isSimple() || !MTy2.isSimple()) {
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
return ((MTy1.getSimpleVT() == MVT::i64) && (MTy2.getSimpleVT() == MVT::i32));
|
|
|
|
}
|
|
|
|
|
|
|
|
bool HexagonTargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
|
|
|
|
if (!VT1.isSimple() || !VT2.isSimple()) {
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
return ((VT1.getSimpleVT() == MVT::i64) && (VT2.getSimpleVT() == MVT::i32));
|
|
|
|
}
|
|
|
|
|
|
|
|
SDValue
|
|
|
|
HexagonTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
|
|
|
|
switch (Op.getOpcode()) {
|
2012-02-07 10:50:20 +08:00
|
|
|
default: llvm_unreachable("Should not custom lower this!");
|
2012-05-11 04:20:25 +08:00
|
|
|
case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
|
2011-12-13 05:14:40 +08:00
|
|
|
// Frame & Return address. Currently unimplemented.
|
2012-05-11 04:20:25 +08:00
|
|
|
case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
|
|
|
|
case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
|
2011-12-13 05:14:40 +08:00
|
|
|
case ISD::GlobalTLSAddress:
|
2012-02-07 10:50:20 +08:00
|
|
|
llvm_unreachable("TLS not implemented for Hexagon.");
|
2011-12-13 05:14:40 +08:00
|
|
|
case ISD::MEMBARRIER: return LowerMEMBARRIER(Op, DAG);
|
|
|
|
case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, DAG);
|
|
|
|
case ISD::GlobalAddress: return LowerGLOBALADDRESS(Op, DAG);
|
|
|
|
case ISD::VASTART: return LowerVASTART(Op, DAG);
|
|
|
|
case ISD::BR_JT: return LowerBR_JT(Op, DAG);
|
|
|
|
|
|
|
|
case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
|
2012-05-11 04:20:25 +08:00
|
|
|
case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
|
|
|
|
case ISD::SELECT: return Op;
|
2011-12-13 05:14:40 +08:00
|
|
|
case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
|
2012-05-11 04:20:25 +08:00
|
|
|
case ISD::INLINEASM: return LowerINLINEASM(Op, DAG);
|
2011-12-13 05:14:40 +08:00
|
|
|
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// Hexagon Scheduler Hooks
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
MachineBasicBlock *
|
|
|
|
HexagonTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
|
|
|
|
MachineBasicBlock *BB)
|
|
|
|
const {
|
|
|
|
switch (MI->getOpcode()) {
|
|
|
|
case Hexagon::ADJDYNALLOC: {
|
|
|
|
MachineFunction *MF = BB->getParent();
|
|
|
|
HexagonMachineFunctionInfo *FuncInfo =
|
|
|
|
MF->getInfo<HexagonMachineFunctionInfo>();
|
|
|
|
FuncInfo->addAllocaAdjustInst(MI);
|
|
|
|
return BB;
|
|
|
|
}
|
2012-02-07 10:50:20 +08:00
|
|
|
default: llvm_unreachable("Unexpected instr type to insert");
|
2011-12-13 05:14:40 +08:00
|
|
|
} // switch
|
|
|
|
}
|
|
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// Inline Assembly Support
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
|
|
|
std::pair<unsigned, const TargetRegisterClass*>
|
|
|
|
HexagonTargetLowering::getRegForInlineAsmConstraint(const
|
|
|
|
std::string &Constraint,
|
|
|
|
EVT VT) const {
|
|
|
|
if (Constraint.size() == 1) {
|
|
|
|
switch (Constraint[0]) {
|
|
|
|
case 'r': // R0-R31
|
|
|
|
switch (VT.getSimpleVT().SimpleTy) {
|
|
|
|
default:
|
2012-02-07 10:50:20 +08:00
|
|
|
llvm_unreachable("getRegForInlineAsmConstraint Unhandled data type");
|
2011-12-13 05:14:40 +08:00
|
|
|
case MVT::i32:
|
|
|
|
case MVT::i16:
|
|
|
|
case MVT::i8:
|
2012-05-11 04:20:25 +08:00
|
|
|
case MVT::f32:
|
2012-04-20 15:30:17 +08:00
|
|
|
return std::make_pair(0U, &Hexagon::IntRegsRegClass);
|
2011-12-13 05:14:40 +08:00
|
|
|
case MVT::i64:
|
2012-05-11 04:20:25 +08:00
|
|
|
case MVT::f64:
|
2012-04-20 15:30:17 +08:00
|
|
|
return std::make_pair(0U, &Hexagon::DoubleRegsRegClass);
|
2011-12-13 05:14:40 +08:00
|
|
|
}
|
|
|
|
default:
|
2012-02-07 10:50:20 +08:00
|
|
|
llvm_unreachable("Unknown asm register class");
|
2011-12-13 05:14:40 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
|
|
|
|
}
|
|
|
|
|
2012-05-11 04:20:25 +08:00
|
|
|
/// isFPImmLegal - Returns true if the target can instruction select the
|
|
|
|
/// specified FP immediate natively. If false, the legalizer will
|
|
|
|
/// materialize the FP immediate as a load from a constant pool.
|
|
|
|
bool HexagonTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
|
|
|
|
const HexagonRegisterInfo* QRI = TM.getRegisterInfo();
|
|
|
|
return QRI->Subtarget.hasV5TOps();
|
|
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}
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|
2011-12-13 05:14:40 +08:00
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/// isLegalAddressingMode - Return true if the addressing mode represented by
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|
/// AM is legal for this target, for a load/store of the specified type.
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|
bool HexagonTargetLowering::isLegalAddressingMode(const AddrMode &AM,
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|
Type *Ty) const {
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|
|
// Allows a signed-extended 11-bit immediate field.
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|
if (AM.BaseOffs <= -(1LL << 13) || AM.BaseOffs >= (1LL << 13)-1) {
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|
return false;
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|
}
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|
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|
// No global is ever allowed as a base.
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|
|
|
if (AM.BaseGV) {
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|
return false;
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|
}
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|
|
int Scale = AM.Scale;
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|
|
if (Scale < 0) Scale = -Scale;
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|
|
switch (Scale) {
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|
case 0: // No scale reg, "r+i", "r", or just "i".
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|
break;
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|
default: // No scaled addressing mode.
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|
|
return false;
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|
|
|
}
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|
|
return true;
|
|
|
|
}
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|
|
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|
|
/// isLegalICmpImmediate - Return true if the specified immediate is legal
|
|
|
|
/// icmp immediate, that is the target has icmp instructions which can compare
|
|
|
|
/// a register against the immediate without having to materialize the
|
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|
|
/// immediate into a register.
|
|
|
|
bool HexagonTargetLowering::isLegalICmpImmediate(int64_t Imm) const {
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|
|
|
return Imm >= -512 && Imm <= 511;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// IsEligibleForTailCallOptimization - Check whether the call is eligible
|
|
|
|
/// for tail call optimization. Targets which want to do tail call
|
|
|
|
/// optimization should implement this function.
|
|
|
|
bool HexagonTargetLowering::IsEligibleForTailCallOptimization(
|
|
|
|
SDValue Callee,
|
|
|
|
CallingConv::ID CalleeCC,
|
|
|
|
bool isVarArg,
|
|
|
|
bool isCalleeStructRet,
|
|
|
|
bool isCallerStructRet,
|
|
|
|
const SmallVectorImpl<ISD::OutputArg> &Outs,
|
|
|
|
const SmallVectorImpl<SDValue> &OutVals,
|
|
|
|
const SmallVectorImpl<ISD::InputArg> &Ins,
|
|
|
|
SelectionDAG& DAG) const {
|
|
|
|
const Function *CallerF = DAG.getMachineFunction().getFunction();
|
|
|
|
CallingConv::ID CallerCC = CallerF->getCallingConv();
|
|
|
|
bool CCMatch = CallerCC == CalleeCC;
|
|
|
|
|
|
|
|
// ***************************************************************************
|
|
|
|
// Look for obvious safe cases to perform tail call optimization that do not
|
|
|
|
// require ABI changes.
|
|
|
|
// ***************************************************************************
|
|
|
|
|
|
|
|
// If this is a tail call via a function pointer, then don't do it!
|
|
|
|
if (!(dyn_cast<GlobalAddressSDNode>(Callee))
|
|
|
|
&& !(dyn_cast<ExternalSymbolSDNode>(Callee))) {
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Do not optimize if the calling conventions do not match.
|
|
|
|
if (!CCMatch)
|
|
|
|
return false;
|
|
|
|
|
|
|
|
// Do not tail call optimize vararg calls.
|
|
|
|
if (isVarArg)
|
|
|
|
return false;
|
|
|
|
|
|
|
|
// Also avoid tail call optimization if either caller or callee uses struct
|
|
|
|
// return semantics.
|
|
|
|
if (isCalleeStructRet || isCallerStructRet)
|
|
|
|
return false;
|
|
|
|
|
|
|
|
// In addition to the cases above, we also disable Tail Call Optimization if
|
|
|
|
// the calling convention code that at least one outgoing argument needs to
|
|
|
|
// go on the stack. We cannot check that here because at this point that
|
|
|
|
// information is not available.
|
|
|
|
return true;
|
|
|
|
}
|