// Subclass of MipsTargetLowering specialized for mips16.
//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "mips-lower"
#include "Mips16ISelLowering.h"
+#include "MCTargetDesc/MipsBaseInfo.h"
#include "MipsRegisterInfo.h"
#include "MipsTargetMachine.h"
-#include "MCTargetDesc/MipsBaseInfo.h"
+#include "llvm/ADT/StringRef.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetInstrInfo.h"
+#include <string>
using namespace llvm;
+#define DEBUG_TYPE "mips-lower"
+
static cl::opt<bool> DontExpandCondPseudos16(
"mips16-dont-expand-cond-pseudo",
cl::init(false),
Mips16TargetLowering::Mips16TargetLowering(MipsTargetMachine &TM)
: MipsTargetLowering(TM) {
- //
- // set up as if mips32 and then revert so we can test the mechanism
- // for switching
- addRegisterClass(MVT::i32, &Mips::GPR32RegClass);
- addRegisterClass(MVT::f32, &Mips::FGR32RegClass);
- computeRegisterProperties();
- clearRegisterClasses();
// Set up the register classes
addRegisterClass(MVT::i32, &Mips::CPU16RegsRegClass);
- if (Subtarget->inMips16HardFloat())
+ if (!TM.Options.UseSoftFloat)
setMips16HardFloatLibCalls();
setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Expand);
setOperationAction(ISD::ATOMIC_LOAD_UMIN, MVT::i32, Expand);
setOperationAction(ISD::ATOMIC_LOAD_UMAX, MVT::i32, Expand);
+ setOperationAction(ISD::ROTR, MVT::i32, Expand);
+ setOperationAction(ISD::ROTR, MVT::i64, Expand);
+ setOperationAction(ISD::BSWAP, MVT::i32, Expand);
+ setOperationAction(ISD::BSWAP, MVT::i64, Expand);
+
computeRegisterProperties();
}
}
bool
-Mips16TargetLowering::allowsUnalignedMemoryAccesses(EVT VT, bool *Fast) const {
+Mips16TargetLowering::allowsUnalignedMemoryAccesses(EVT VT,
+ unsigned,
+ bool *Fast) const {
return false;
}
case Mips::SelBneZ:
return emitSel16(Mips::BnezRxImm16, MI, BB);
case Mips::SelTBteqZCmpi:
- return emitSeliT16(Mips::BteqzX16, Mips::CmpiRxImmX16, MI, BB);
+ return emitSeliT16(Mips::Bteqz16, Mips::CmpiRxImmX16, MI, BB);
case Mips::SelTBteqZSlti:
- return emitSeliT16(Mips::BteqzX16, Mips::SltiRxImmX16, MI, BB);
+ return emitSeliT16(Mips::Bteqz16, Mips::SltiRxImmX16, MI, BB);
case Mips::SelTBteqZSltiu:
- return emitSeliT16(Mips::BteqzX16, Mips::SltiuRxImmX16, MI, BB);
+ return emitSeliT16(Mips::Bteqz16, Mips::SltiuRxImmX16, MI, BB);
case Mips::SelTBtneZCmpi:
- return emitSeliT16(Mips::BtnezX16, Mips::CmpiRxImmX16, MI, BB);
+ return emitSeliT16(Mips::Btnez16, Mips::CmpiRxImmX16, MI, BB);
case Mips::SelTBtneZSlti:
- return emitSeliT16(Mips::BtnezX16, Mips::SltiRxImmX16, MI, BB);
+ return emitSeliT16(Mips::Btnez16, Mips::SltiRxImmX16, MI, BB);
case Mips::SelTBtneZSltiu:
- return emitSeliT16(Mips::BtnezX16, Mips::SltiuRxImmX16, MI, BB);
+ return emitSeliT16(Mips::Btnez16, Mips::SltiuRxImmX16, MI, BB);
case Mips::SelTBteqZCmp:
- return emitSelT16(Mips::BteqzX16, Mips::CmpRxRy16, MI, BB);
+ return emitSelT16(Mips::Bteqz16, Mips::CmpRxRy16, MI, BB);
case Mips::SelTBteqZSlt:
- return emitSelT16(Mips::BteqzX16, Mips::SltRxRy16, MI, BB);
+ return emitSelT16(Mips::Bteqz16, Mips::SltRxRy16, MI, BB);
case Mips::SelTBteqZSltu:
- return emitSelT16(Mips::BteqzX16, Mips::SltuRxRy16, MI, BB);
+ return emitSelT16(Mips::Bteqz16, Mips::SltuRxRy16, MI, BB);
case Mips::SelTBtneZCmp:
- return emitSelT16(Mips::BtnezX16, Mips::CmpRxRy16, MI, BB);
+ return emitSelT16(Mips::Btnez16, Mips::CmpRxRy16, MI, BB);
case Mips::SelTBtneZSlt:
- return emitSelT16(Mips::BtnezX16, Mips::SltRxRy16, MI, BB);
+ return emitSelT16(Mips::Btnez16, Mips::SltRxRy16, MI, BB);
case Mips::SelTBtneZSltu:
- return emitSelT16(Mips::BtnezX16, Mips::SltuRxRy16, MI, BB);
+ return emitSelT16(Mips::Btnez16, Mips::SltuRxRy16, MI, BB);
case Mips::BteqzT8CmpX16:
- return emitFEXT_T8I816_ins(Mips::BteqzX16, Mips::CmpRxRy16, MI, BB);
+ return emitFEXT_T8I816_ins(Mips::Bteqz16, Mips::CmpRxRy16, MI, BB);
case Mips::BteqzT8SltX16:
- return emitFEXT_T8I816_ins(Mips::BteqzX16, Mips::SltRxRy16, MI, BB);
+ return emitFEXT_T8I816_ins(Mips::Bteqz16, Mips::SltRxRy16, MI, BB);
case Mips::BteqzT8SltuX16:
// TBD: figure out a way to get this or remove the instruction
// altogether.
- return emitFEXT_T8I816_ins(Mips::BteqzX16, Mips::SltuRxRy16, MI, BB);
+ return emitFEXT_T8I816_ins(Mips::Bteqz16, Mips::SltuRxRy16, MI, BB);
case Mips::BtnezT8CmpX16:
- return emitFEXT_T8I816_ins(Mips::BtnezX16, Mips::CmpRxRy16, MI, BB);
+ return emitFEXT_T8I816_ins(Mips::Btnez16, Mips::CmpRxRy16, MI, BB);
case Mips::BtnezT8SltX16:
- return emitFEXT_T8I816_ins(Mips::BtnezX16, Mips::SltRxRy16, MI, BB);
+ return emitFEXT_T8I816_ins(Mips::Btnez16, Mips::SltRxRy16, MI, BB);
case Mips::BtnezT8SltuX16:
// TBD: figure out a way to get this or remove the instruction
// altogether.
- return emitFEXT_T8I816_ins(Mips::BtnezX16, Mips::SltuRxRy16, MI, BB);
+ return emitFEXT_T8I816_ins(Mips::Btnez16, Mips::SltuRxRy16, MI, BB);
case Mips::BteqzT8CmpiX16: return emitFEXT_T8I8I16_ins(
- Mips::BteqzX16, Mips::CmpiRxImm16, Mips::CmpiRxImmX16, false, MI, BB);
+ Mips::Bteqz16, Mips::CmpiRxImm16, Mips::CmpiRxImmX16, false, MI, BB);
case Mips::BteqzT8SltiX16: return emitFEXT_T8I8I16_ins(
- Mips::BteqzX16, Mips::SltiRxImm16, Mips::SltiRxImmX16, true, MI, BB);
+ Mips::Bteqz16, Mips::SltiRxImm16, Mips::SltiRxImmX16, true, MI, BB);
case Mips::BteqzT8SltiuX16: return emitFEXT_T8I8I16_ins(
- Mips::BteqzX16, Mips::SltiuRxImm16, Mips::SltiuRxImmX16, false, MI, BB);
+ Mips::Bteqz16, Mips::SltiuRxImm16, Mips::SltiuRxImmX16, false, MI, BB);
case Mips::BtnezT8CmpiX16: return emitFEXT_T8I8I16_ins(
- Mips::BtnezX16, Mips::CmpiRxImm16, Mips::CmpiRxImmX16, false, MI, BB);
+ Mips::Btnez16, Mips::CmpiRxImm16, Mips::CmpiRxImmX16, false, MI, BB);
case Mips::BtnezT8SltiX16: return emitFEXT_T8I8I16_ins(
- Mips::BtnezX16, Mips::SltiRxImm16, Mips::SltiRxImmX16, true, MI, BB);
+ Mips::Btnez16, Mips::SltiRxImm16, Mips::SltiRxImmX16, true, MI, BB);
case Mips::BtnezT8SltiuX16: return emitFEXT_T8I8I16_ins(
- Mips::BtnezX16, Mips::SltiuRxImm16, Mips::SltiuRxImmX16, false, MI, BB);
+ Mips::Btnez16, Mips::SltiuRxImm16, Mips::SltiuRxImmX16, false, MI, BB);
break;
case Mips::SltCCRxRy16:
return emitFEXT_CCRX16_ins(Mips::SltRxRy16, MI, BB);
#define T P "0" , T1
#define P P_
static char const * vMips16Helper[MAX_STUB_NUMBER+1] =
- {0, T1 };
+ {nullptr, T1 };
#undef P
#define P P_ "sf_"
static char const * sfMips16Helper[MAX_STUB_NUMBER+1] =
bool IsPICCall, bool GlobalOrExternal, bool InternalLinkage,
CallLoweringInfo &CLI, SDValue Callee, SDValue Chain) const {
SelectionDAG &DAG = CLI.DAG;
- const char* Mips16HelperFunction = 0;
+ MachineFunction &MF = DAG.getMachineFunction();
+ MipsFunctionInfo *FuncInfo = MF.getInfo<MipsFunctionInfo>();
+ const char* Mips16HelperFunction = nullptr;
bool NeedMips16Helper = false;
- if (getTargetMachine().Options.UseSoftFloat &&
- Subtarget->inMips16HardFloat()) {
+ if (Subtarget.inMips16HardFloat()) {
//
// currently we don't have symbols tagged with the mips16 or mips32
// qualifier so we will assume that we don't know what kind it is.
if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(CLI.Callee)) {
Mips16Libcall Find = { RTLIB::UNKNOWN_LIBCALL, S->getSymbol() };
- if (std::binary_search(HardFloatLibCalls, array_endof(HardFloatLibCalls),
- Find))
+ if (std::binary_search(std::begin(HardFloatLibCalls),
+ std::end(HardFloatLibCalls), Find))
LookupHelper = false;
else {
- Mips16IntrinsicHelperType IntrinsicFind = {S->getSymbol(), ""};
+ const char *Symbol = S->getSymbol();
+ Mips16IntrinsicHelperType IntrinsicFind = { Symbol, "" };
+ const Mips16HardFloatInfo::FuncSignature *Signature =
+ Mips16HardFloatInfo::findFuncSignature(Symbol);
+ if (!IsPICCall && (Signature && (FuncInfo->StubsNeeded.find(Symbol) ==
+ FuncInfo->StubsNeeded.end()))) {
+ FuncInfo->StubsNeeded[Symbol] = Signature;
+ //
+ // S2 is normally saved if the stub is for a function which
+ // returns a float or double value and is not otherwise. This is
+ // because more work is required after the function the stub
+ // is calling completes, and so the stub cannot directly return
+ // and the stub has no stack space to store the return address so
+ // S2 is used for that purpose.
+ // In order to take advantage of not saving S2, we need to also
+ // optimize the call in the stub and this requires some further
+ // functionality in MipsAsmPrinter which we don't have yet.
+ // So for now we always save S2. The optimization will be done
+ // in a follow-on patch.
+ //
+ if (1 || (Signature->RetSig != Mips16HardFloatInfo::NoFPRet))
+ FuncInfo->setSaveS2();
+ }
// one more look at list of intrinsics
- if (std::binary_search(Mips16IntrinsicHelper,
- array_endof(Mips16IntrinsicHelper),
- IntrinsicFind)) {
- const Mips16IntrinsicHelperType *h =(std::find(Mips16IntrinsicHelper,
- array_endof(Mips16IntrinsicHelper),
- IntrinsicFind));
- Mips16HelperFunction = h->Helper;
+ const Mips16IntrinsicHelperType *Helper =
+ std::lower_bound(std::begin(Mips16IntrinsicHelper),
+ std::end(Mips16IntrinsicHelper), IntrinsicFind);
+ if (Helper != std::end(Mips16IntrinsicHelper) &&
+ *Helper == IntrinsicFind) {
+ Mips16HelperFunction = Helper->Helper;
NeedMips16Helper = true;
LookupHelper = false;
}
Mips16Libcall Find = { RTLIB::UNKNOWN_LIBCALL,
G->getGlobal()->getName().data() };
- if (std::binary_search(HardFloatLibCalls, array_endof(HardFloatLibCalls),
- Find))
+ if (std::binary_search(std::begin(HardFloatLibCalls),
+ std::end(HardFloatLibCalls), Find))
LookupHelper = false;
}
- if (LookupHelper) Mips16HelperFunction =
- getMips16HelperFunction(CLI.RetTy, CLI.Args, NeedMips16Helper);
-
+ if (LookupHelper)
+ Mips16HelperFunction =
+ getMips16HelperFunction(CLI.RetTy, CLI.getArgs(), NeedMips16Helper);
}
SDValue JumpTarget = Callee;
if (NeedMips16Helper) {
RegsToPass.push_front(std::make_pair(V0Reg, Callee));
JumpTarget = DAG.getExternalSymbol(Mips16HelperFunction, getPointerTy());
- JumpTarget = getAddrGlobal(cast<ExternalSymbolSDNode>(JumpTarget),
- JumpTarget.getValueType(), DAG,
- MipsII::MO_GOT);
+ ExternalSymbolSDNode *S = cast<ExternalSymbolSDNode>(JumpTarget);
+ JumpTarget = getAddrGlobal(S, JumpTarget.getValueType(), DAG,
+ MipsII::MO_GOT, Chain,
+ FuncInfo->callPtrInfo(S->getSymbol()));
} else
RegsToPass.push_front(std::make_pair((unsigned)Mips::T9, Callee));
}
// Transfer the remainder of BB and its successor edges to sinkMBB.
sinkMBB->splice(sinkMBB->begin(), BB,
- llvm::next(MachineBasicBlock::iterator(MI)),
- BB->end());
+ std::next(MachineBasicBlock::iterator(MI)), BB->end());
sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
// Next, add the true and fallthrough blocks as its successors.
// Transfer the remainder of BB and its successor edges to sinkMBB.
sinkMBB->splice(sinkMBB->begin(), BB,
- llvm::next(MachineBasicBlock::iterator(MI)),
- BB->end());
+ std::next(MachineBasicBlock::iterator(MI)), BB->end());
sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
// Next, add the true and fallthrough blocks as its successors.
// Transfer the remainder of BB and its successor edges to sinkMBB.
sinkMBB->splice(sinkMBB->begin(), BB,
- llvm::next(MachineBasicBlock::iterator(MI)),
- BB->end());
+ std::next(MachineBasicBlock::iterator(MI)), BB->end());
sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
// Next, add the true and fallthrough blocks as its successors.
unsigned CC = MI->getOperand(0).getReg();
unsigned regX = MI->getOperand(1).getReg();
unsigned regY = MI->getOperand(2).getReg();
- BuildMI(*BB, MI, MI->getDebugLoc(),
- TII->get(SltOpc)).addReg(regX).addReg(regY);
+ BuildMI(*BB, MI, MI->getDebugLoc(), TII->get(SltOpc)).addReg(regX).addReg(
+ regY);
BuildMI(*BB, MI, MI->getDebugLoc(),
TII->get(Mips::MoveR3216), CC).addReg(Mips::T8);
MI->eraseFromParent(); // The pseudo instruction is gone now.
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