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Modify lowering of GlobalAddress so that correct code is emitted when target is

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Mips64.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141618 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2011-10-11 00:55:05 +00:00
parent 4ad06e61c0
commit a5903acd6b
3 changed files with 23 additions and 14 deletions

3
lib/Target/Mips/Mips64InstrInfo.td

@ -227,3 +227,6 @@ def : Pat<(zextloadi32_u addr:$a), (DSRL (DSLL (ULW64_P8 addr:$a), 32), 32)>,
Requires<[IsN64]>;
def : Pat<(zextloadi32_u addr:$a), (DSRL (DSLL (ULW64 addr:$a), 32), 32)>,
Requires<[NotN64]>;
// hi/lo relocs
def : Pat<(i64 (MipsLo tglobaladdr:$in)), (DADDiu ZERO_64, tglobaladdr:$in)>;

32
lib/Target/Mips/MipsISelLowering.cpp

@ -84,7 +84,7 @@ MipsTargetLowering::
MipsTargetLowering(MipsTargetMachine &TM)
: TargetLowering(TM, new MipsTargetObjectFile()),
Subtarget(&TM.getSubtarget<MipsSubtarget>()),
HasMips64(Subtarget->hasMips64()) {
HasMips64(Subtarget->hasMips64()), IsN64(Subtarget->isABI_N64()) {
// Mips does not have i1 type, so use i32 for
// setcc operations results (slt, sgt, ...).
@ -123,6 +123,7 @@ MipsTargetLowering(MipsTargetMachine &TM)
// Mips Custom Operations
setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
setOperationAction(ISD::JumpTable, MVT::i32, Custom);
@ -1384,9 +1385,9 @@ SDValue MipsTargetLowering::LowerGlobalAddress(SDValue Op,
SelectionDAG &DAG) const {
// FIXME there isn't actually debug info here
DebugLoc dl = Op.getDebugLoc();
const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
if (getTargetMachine().getRelocationModel() != Reloc::PIC_) {
if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64) {
SDVTList VTs = DAG.getVTList(MVT::i32);
MipsTargetObjectFile &TLOF = (MipsTargetObjectFile&)getObjFileLowering();
@ -1409,21 +1410,26 @@ SDValue MipsTargetLowering::LowerGlobalAddress(SDValue Op,
return DAG.getNode(ISD::ADD, dl, MVT::i32, HiPart, Lo);
}
SDValue GA = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
MipsII::MO_GOT);
GA = DAG.getNode(MipsISD::WrapperPIC, dl, MVT::i32, GA);
SDValue ResNode = DAG.getLoad(MVT::i32, dl,
EVT ValTy = Op.getValueType();
bool HasGotOfst = (GV->hasInternalLinkage() ||
(GV->hasLocalLinkage() && !isa<Function>(GV)));
unsigned GotFlag = IsN64 ?
(HasGotOfst ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT_DISP) :
MipsII::MO_GOT;
SDValue GA = DAG.getTargetGlobalAddress(GV, dl, ValTy, 0, GotFlag);
GA = DAG.getNode(MipsISD::WrapperPIC, dl, ValTy, GA);
SDValue ResNode = DAG.getLoad(ValTy, dl,
DAG.getEntryNode(), GA, MachinePointerInfo(),
false, false, 0);
// On functions and global targets not internal linked only
// a load from got/GP is necessary for PIC to work.
if (!GV->hasInternalLinkage() &&
(!GV->hasLocalLinkage() || isa<Function>(GV)))
if (!HasGotOfst)
return ResNode;
SDValue GALo = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
MipsII::MO_ABS_LO);
SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, GALo);
return DAG.getNode(ISD::ADD, dl, MVT::i32, ResNode, Lo);
SDValue GALo = DAG.getTargetGlobalAddress(GV, dl, ValTy, 0,
IsN64 ? MipsII::MO_GOT_OFST :
MipsII::MO_ABS_LO);
SDValue Lo = DAG.getNode(MipsISD::Lo, dl, ValTy, GALo);
return DAG.getNode(ISD::ADD, dl, ValTy, ResNode, Lo);
}
SDValue MipsTargetLowering::LowerBlockAddress(SDValue Op,

2
lib/Target/Mips/MipsISelLowering.h

@ -115,7 +115,7 @@ namespace llvm {
// Subtarget Info
const MipsSubtarget *Subtarget;
bool HasMips64;
bool HasMips64, IsN64;
// Lower Operand helpers
SDValue LowerCallResult(SDValue Chain, SDValue InFlag,