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First draft of EH support on x86/64-linux 

llvm-svn: 55899
This commit is contained in:
Anton Korobeynikov 2008-09-08 14:21:53 +00:00
parent cb0655d626
commit 82b9540046
4 changed files with 62 additions and 34 deletions
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4
llvm/include/llvm/Intrinsics.td
View File

@ -255,8 +255,8 @@ def int_eh_selector_i64 : Intrinsic<[llvm_i64_ty, llvm_ptr_ty, llvm_ptr_ty,
def int_eh_typeid_for_i32 : Intrinsic<[llvm_i32_ty, llvm_ptr_ty]>;
def int_eh_typeid_for_i64 : Intrinsic<[llvm_i64_ty, llvm_ptr_ty]>;
def int_eh_return : Intrinsic<[llvm_void_ty, llvm_i32_ty, llvm_ptr_ty]>,
GCCBuiltin<"__builtin_eh_return">;
def int_eh_return_i32 : Intrinsic<[llvm_void_ty, llvm_i32_ty, llvm_ptr_ty]>;
def int_eh_return_i64 : Intrinsic<[llvm_void_ty, llvm_i64_ty, llvm_ptr_ty]>;
def int_eh_unwind_init: Intrinsic<[llvm_void_ty]>,
GCCBuiltin<"__builtin_unwind_init">;

21
llvm/lib/Target/X86/X86ISelLowering.cpp
View File

@ -316,7 +316,6 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
if (Subtarget->is64Bit()) {
// FIXME: Verify
setExceptionPointerRegister(X86::RAX);
setExceptionSelectorRegister(X86::RDX);
} else {
@ -5596,7 +5595,7 @@ SDValue X86TargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) {
SDValue RetAddrFI = getReturnAddressFrameIndex(DAG);
return DAG.getNode(ISD::SUB, getPointerTy(), RetAddrFI,
DAG.getIntPtrConstant(!Subtarget->is64Bit() ? 4 : 8));
DAG.getIntPtrConstant(Subtarget->is64Bit() ? 8 : 4));
}
SDValue X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDValue Op,
@ -5606,26 +5605,26 @@ SDValue X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDValue Op,
SDValue X86TargetLowering::LowerEH_RETURN(SDValue Op, SelectionDAG &DAG)
{
assert(!Subtarget->is64Bit() &&
"Lowering of eh_return builtin is not supported yet on x86-64");
MachineFunction &MF = DAG.getMachineFunction();
SDValue Chain = Op.getOperand(0);
SDValue Offset = Op.getOperand(1);
SDValue Handler = Op.getOperand(2);
SDValue Frame = DAG.getRegister(RegInfo->getFrameRegister(MF),
SDValue Frame = DAG.getRegister(Subtarget->is64Bit() ? X86::RBP : X86::EBP,
getPointerTy());
unsigned StoreAddrReg = (Subtarget->is64Bit() ? X86::RCX : X86::ECX);
SDValue StoreAddr = DAG.getNode(ISD::SUB, getPointerTy(), Frame,
DAG.getIntPtrConstant(-4UL));
DAG.getIntPtrConstant(Subtarget->is64Bit() ?
-8UL: -4UL));
StoreAddr = DAG.getNode(ISD::ADD, getPointerTy(), StoreAddr, Offset);
Chain = DAG.getStore(Chain, Handler, StoreAddr, NULL, 0);
Chain = DAG.getCopyToReg(Chain, X86::ECX, StoreAddr);
MF.getRegInfo().addLiveOut(X86::ECX);
Chain = DAG.getCopyToReg(Chain, StoreAddrReg, StoreAddr);
MF.getRegInfo().addLiveOut(StoreAddrReg);
return DAG.getNode(X86ISD::EH_RETURN, MVT::Other,
Chain, DAG.getRegister(X86::ECX, getPointerTy()));
return DAG.getNode(X86ISD::EH_RETURN,
MVT::Other,
Chain, DAG.getRegister(StoreAddrReg, getPointerTy()));
}
SDValue X86TargetLowering::LowerTRAMPOLINE(SDValue Op,

11
llvm/lib/Target/X86/X86Instr64bit.td
View File

@ -129,6 +129,17 @@ let isBranch = 1, isTerminator = 1, isBarrier = 1, isIndirectBranch = 1 in {
[(brind (loadi64 addr:$dst))]>;
}
//===----------------------------------------------------------------------===//
// EH Pseudo Instructions
//
let isTerminator = 1, isReturn = 1, isBarrier = 1,
hasCtrlDep = 1 in {
def EH_RETURN64 : I<0xC3, RawFrm, (outs), (ins GR64:$addr),
"ret\t#eh_return, addr: $addr",
[(X86ehret GR64:$addr)]>;
}
//===----------------------------------------------------------------------===//
// Miscellaneous Instructions...
//

58
llvm/lib/Target/X86/X86RegisterInfo.cpp
View File

@ -159,6 +159,14 @@ X86RegisterInfo::getCrossCopyRegClass(const TargetRegisterClass *RC) const {
const unsigned *
X86RegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
bool callsEHReturn = false;
if (MF) {
const MachineFrameInfo *MFI = MF->getFrameInfo();
const MachineModuleInfo *MMI = MFI->getMachineModuleInfo();
callsEHReturn = (MMI ? MMI->callsEHReturn() : false);
}
static const unsigned CalleeSavedRegs32Bit[] = {
X86::ESI, X86::EDI, X86::EBX, X86::EBP, 0
};
@ -171,6 +179,11 @@ X86RegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
X86::RBX, X86::R12, X86::R13, X86::R14, X86::R15, X86::RBP, 0
};
static const unsigned CalleeSavedRegs64EHRet[] = {
X86::RAX, X86::RDX, X86::RBX, X86::R12,
X86::R13, X86::R14, X86::R15, X86::RBP, 0
};
static const unsigned CalleeSavedRegsWin64[] = {
X86::RBX, X86::RBP, X86::RDI, X86::RSI,
X86::R12, X86::R13, X86::R14, X86::R15, 0
@ -180,20 +193,22 @@ X86RegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
if (IsWin64)
return CalleeSavedRegsWin64;
else
return CalleeSavedRegs64Bit;
return (callsEHReturn ? CalleeSavedRegs64EHRet : CalleeSavedRegs64Bit);
} else {
if (MF) {
const MachineFrameInfo *MFI = MF->getFrameInfo();
const MachineModuleInfo *MMI = MFI->getMachineModuleInfo();
if (MMI && MMI->callsEHReturn())
return CalleeSavedRegs32EHRet;
}
return CalleeSavedRegs32Bit;
return (callsEHReturn ? CalleeSavedRegs32EHRet : CalleeSavedRegs32Bit);
}
}
const TargetRegisterClass* const*
X86RegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const {
bool callsEHReturn = false;
if (MF) {
const MachineFrameInfo *MFI = MF->getFrameInfo();
const MachineModuleInfo *MMI = MFI->getMachineModuleInfo();
callsEHReturn = (MMI ? MMI->callsEHReturn() : false);
}
static const TargetRegisterClass * const CalleeSavedRegClasses32Bit[] = {
&X86::GR32RegClass, &X86::GR32RegClass,
&X86::GR32RegClass, &X86::GR32RegClass, 0
@ -208,6 +223,12 @@ X86RegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const {
&X86::GR64RegClass, &X86::GR64RegClass,
&X86::GR64RegClass, &X86::GR64RegClass, 0
};
static const TargetRegisterClass * const CalleeSavedRegClasses64EHRet[] = {
&X86::GR64RegClass, &X86::GR64RegClass,
&X86::GR64RegClass, &X86::GR64RegClass,
&X86::GR64RegClass, &X86::GR64RegClass,
&X86::GR64RegClass, &X86::GR64RegClass, 0
};
static const TargetRegisterClass * const CalleeSavedRegClassesWin64[] = {
&X86::GR64RegClass, &X86::GR64RegClass,
&X86::GR64RegClass, &X86::GR64RegClass,
@ -219,17 +240,12 @@ X86RegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const {
if (IsWin64)
return CalleeSavedRegClassesWin64;
else
return CalleeSavedRegClasses64Bit;
return (callsEHReturn ?
CalleeSavedRegClasses64EHRet : CalleeSavedRegClasses64Bit);
} else {
if (MF) {
const MachineFrameInfo *MFI = MF->getFrameInfo();
const MachineModuleInfo *MMI = MFI->getMachineModuleInfo();
if (MMI && MMI->callsEHReturn())
return CalleeSavedRegClasses32EHRet;
return (callsEHReturn ?
CalleeSavedRegClasses32EHRet : CalleeSavedRegClasses32Bit);
}
return CalleeSavedRegClasses32Bit;
}
}
BitVector X86RegisterInfo::getReservedRegs(const MachineFunction &MF) const {
@ -787,6 +803,7 @@ void X86RegisterInfo::emitEpilogue(MachineFunction &MF,
case X86::TCRETURNri64:
case X86::TCRETURNdi64:
case X86::EH_RETURN:
case X86::EH_RETURN64:
case X86::TAILJMPd:
case X86::TAILJMPr:
case X86::TAILJMPm: break; // These are ok
@ -860,12 +877,13 @@ void X86RegisterInfo::emitEpilogue(MachineFunction &MF,
}
// We're returning from function via eh_return.
if (RetOpcode == X86::EH_RETURN) {
if (RetOpcode == X86::EH_RETURN || RetOpcode == X86::EH_RETURN64) {
MBBI = prior(MBB.end());
MachineOperand &DestAddr = MBBI->getOperand(0);
assert(DestAddr.isRegister() && "Offset should be in register!");
BuildMI(MBB, MBBI, TII.get(Is64Bit ? X86::MOV64rr : X86::MOV32rr),StackPtr).
addReg(DestAddr.getReg());
BuildMI(MBB, MBBI,
TII.get(Is64Bit ? X86::MOV64rr : X86::MOV32rr),
StackPtr).addReg(DestAddr.getReg());
// Tail call return: adjust the stack pointer and jump to callee
} else if (RetOpcode == X86::TCRETURNri || RetOpcode == X86::TCRETURNdi ||
RetOpcode== X86::TCRETURNri64 || RetOpcode == X86::TCRETURNdi64) {