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Minor fixes.

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Added ConstantPool support.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53951 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bruno Cardoso Lopes
2008-07-23 16:01:50 +00:00
parent fcf0e86bf2
commit 92e87f2379
5 changed files with 54 additions and 28 deletions
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37
lib/Target/Mips/MipsISelLowering.cpp
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@@ -86,7 +86,7 @@ MipsTargetLowering(MipsTargetMachine &TM): TargetLowering(TM)
setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
setOperationAction(ISD::RET, MVT::Other, Custom);
setOperationAction(ISD::JumpTable, MVT::i32, Custom);
setOperationAction(ISD::ConstantPool, MVT::f32, Custom);
setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
@@ -234,10 +234,14 @@ AddLiveIn(MachineFunction &MF, unsigned PReg, TargetRegisterClass *RC)
return VReg;
}
// A address must be loaded from a small section if its size is less than the
// small section size threshold. Data in this section must be addressed using
// gp_rel operator.
bool MipsTargetLowering::IsInSmallSection(unsigned Size) {
return (Size > 0 && (Size <= Subtarget->getSSectionThreshold()));
}
// Discover if this global address can be placed into small data/bss section.
// This should happen for globals with size less than small section size
// threshold in no abicall environments. Data in this section must be addressed
// using gp_rel operator.
bool MipsTargetLowering::IsGlobalInSmallSection(GlobalValue *GV)
{
const TargetData *TD = getTargetData();
@@ -258,10 +262,7 @@ bool MipsTargetLowering::IsGlobalInSmallSection(GlobalValue *GV)
return false;
}
if (Size > 0 && (Size <= Subtarget->getSSectionThreshold()))
return true;
return false;
return IsInSmallSection(Size);
}
//===----------------------------------------------------------------------===//
@@ -352,8 +353,24 @@ LowerJumpTable(SDOperand Op, SelectionDAG &DAG)
SDOperand MipsTargetLowering::
LowerConstantPool(SDOperand Op, SelectionDAG &DAG)
{
assert(0 && "ConstantPool not implemented for MIPS.");
return SDOperand(); // Not reached
SDOperand ResNode;
ConstantPoolSDNode *N = cast<ConstantPoolSDNode>(Op);
Constant *C = N->getConstVal();
SDOperand CP = DAG.getTargetConstantPool(C, MVT::i32, N->getAlignment());
// gp_rel relocation
if (!Subtarget->hasABICall() &&
IsInSmallSection(getTargetData()->getABITypeSize(C->getType()))) {
SDOperand GPRelNode = DAG.getNode(MipsISD::GPRel, MVT::i32, CP);
SDOperand GOT = DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, MVT::i32);
ResNode = DAG.getNode(ISD::ADD, MVT::i32, GOT, GPRelNode);
} else { // %hi/%lo relocation
SDOperand HiPart = DAG.getNode(MipsISD::Hi, MVT::i32, CP);
SDOperand Lo = DAG.getNode(MipsISD::Lo, MVT::i32, CP);
ResNode = DAG.getNode(ISD::ADD, MVT::i32, HiPart, Lo);
}
return ResNode;
}
//===----------------------------------------------------------------------===//