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Fix PR11985

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- BlockAddress has no support of BA + offset form and there is no way to
  propagate that offset into machine operand;
- Add BA + offset support and a new interface 'getTargetBlockAddress' to
  simplify target block address forming;
- All targets are modified to use new interface and X86 backend is enhanced to
  support BA + offset addressing.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163743 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Liao
2012-09-12 21:43:09 +00:00
parent 0d1bc5f916
commit 6c7ccaa3fd
15 changed files with 86 additions and 35 deletions
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4
include/llvm/CodeGen/MachineOperand.h
View File

@@ -628,11 +628,11 @@ public:
Op.setTargetFlags(TargetFlags);
return Op;
}
static MachineOperand CreateBA(const BlockAddress *BA,
static MachineOperand CreateBA(const BlockAddress *BA, int64_t Offset,
unsigned char TargetFlags = 0) {
MachineOperand Op(MachineOperand::MO_BlockAddress);
Op.Contents.OffsetedInfo.Val.BA = BA;
Op.setOffset(0); // Offset is always 0.
Op.setOffset(Offset);
Op.setTargetFlags(TargetFlags);
return Op;
}

8
include/llvm/CodeGen/SelectionDAG.h
View File

@@ -437,7 +437,13 @@ public:
SDValue getRegisterMask(const uint32_t *RegMask);
SDValue getEHLabel(DebugLoc dl, SDValue Root, MCSymbol *Label);
SDValue getBlockAddress(const BlockAddress *BA, EVT VT,
bool isTarget = false, unsigned char TargetFlags = 0);
int64_t Offset = 0, bool isTarget = false,
unsigned char TargetFlags = 0);
SDValue getTargetBlockAddress(const BlockAddress *BA, EVT VT,
int64_t Offset = 0,
unsigned char TargetFlags = 0) {
return getBlockAddress(BA, VT, Offset, true, TargetFlags);
}
SDValue getCopyToReg(SDValue Chain, DebugLoc dl, unsigned Reg, SDValue N) {
return getNode(ISD::CopyToReg, dl, MVT::Other, Chain,

6
include/llvm/CodeGen/SelectionDAGNodes.h
View File

@@ -1483,15 +1483,17 @@ public:
class BlockAddressSDNode : public SDNode {
const BlockAddress *BA;
int64_t Offset;
unsigned char TargetFlags;
friend class SelectionDAG;
BlockAddressSDNode(unsigned NodeTy, EVT VT, const BlockAddress *ba,
unsigned char Flags)
int64_t o, unsigned char Flags)
: SDNode(NodeTy, DebugLoc(), getSDVTList(VT)),
BA(ba), TargetFlags(Flags) {
BA(ba), Offset(o), TargetFlags(Flags) {
}
public:
const BlockAddress *getBlockAddress() const { return BA; }
int64_t getOffset() const { return Offset; }
unsigned char getTargetFlags() const { return TargetFlags; }
static bool classof(const BlockAddressSDNode *) { return true; }