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author | Yingchi Long <i@lyc.dev> | 2024-03-06 19:47:44 +0800 |
---|---|---|
committer | GitHub <noreply@github.com> | 2024-03-06 19:47:44 +0800 |
commit | cf922e51b850410a3a2944035432f44f1e741b21 (patch) | |
tree | cf4f97d5762a239ded41531efeaa10f78bba75db /llvm/lib/Target/BPF | |
parent | 5ddc5b8525a9256716cda1398249f0ab2dd968eb (diff) | |
download | llvm-cf922e51b850410a3a2944035432f44f1e741b21.zip llvm-cf922e51b850410a3a2944035432f44f1e741b21.tar.gz llvm-cf922e51b850410a3a2944035432f44f1e741b21.tar.bz2 |
[BPF] lowering target address leaf nodes tconstpool (#73667)
Adds custom lowering for tconstpool.
Please ref: https://github.com/llvm/llvm-project/pull/73668 for test
coverage
Diffstat (limited to 'llvm/lib/Target/BPF')
-rw-r--r-- | llvm/lib/Target/BPF/BPFISelLowering.cpp | 37 | ||||
-rw-r--r-- | llvm/lib/Target/BPF/BPFISelLowering.h | 5 | ||||
-rw-r--r-- | llvm/lib/Target/BPF/BPFInstrInfo.td | 1 | ||||
-rw-r--r-- | llvm/lib/Target/BPF/BPFMCInstLower.cpp | 3 |
4 files changed, 40 insertions, 6 deletions
diff --git a/llvm/lib/Target/BPF/BPFISelLowering.cpp b/llvm/lib/Target/BPF/BPFISelLowering.cpp index 4d8ace7..b8ca8ec 100644 --- a/llvm/lib/Target/BPF/BPFISelLowering.cpp +++ b/llvm/lib/Target/BPF/BPFISelLowering.cpp @@ -69,7 +69,7 @@ BPFTargetLowering::BPFTargetLowering(const TargetMachine &TM, setOperationAction(ISD::BRIND, MVT::Other, Expand); setOperationAction(ISD::BRCOND, MVT::Other, Expand); - setOperationAction(ISD::GlobalAddress, MVT::i64, Custom); + setOperationAction({ISD::GlobalAddress, ISD::ConstantPool}, MVT::i64, Custom); setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Custom); setOperationAction(ISD::STACKSAVE, MVT::Other, Expand); @@ -308,6 +308,8 @@ SDValue BPFTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const { return LowerBR_CC(Op, DAG); case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG); + case ISD::ConstantPool: + return LowerConstantPool(Op, DAG); case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG); case ISD::SDIV: @@ -691,18 +693,41 @@ const char *BPFTargetLowering::getTargetNodeName(unsigned Opcode) const { return nullptr; } +static SDValue getTargetNode(GlobalAddressSDNode *N, const SDLoc &DL, EVT Ty, + SelectionDAG &DAG, unsigned Flags) { + return DAG.getTargetGlobalAddress(N->getGlobal(), DL, Ty, 0, Flags); +} + +static SDValue getTargetNode(ConstantPoolSDNode *N, const SDLoc &DL, EVT Ty, + SelectionDAG &DAG, unsigned Flags) { + return DAG.getTargetConstantPool(N->getConstVal(), Ty, N->getAlign(), + N->getOffset(), Flags); +} + +template <class NodeTy> +SDValue BPFTargetLowering::getAddr(NodeTy *N, SelectionDAG &DAG, + unsigned Flags) const { + SDLoc DL(N); + + SDValue GA = getTargetNode(N, DL, MVT::i64, DAG, Flags); + + return DAG.getNode(BPFISD::Wrapper, DL, MVT::i64, GA); +} + SDValue BPFTargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const { - auto *N = cast<GlobalAddressSDNode>(Op); + GlobalAddressSDNode *N = cast<GlobalAddressSDNode>(Op); if (N->getOffset() != 0) report_fatal_error("invalid offset for global address: " + Twine(N->getOffset())); + return getAddr(N, DAG); +} - SDLoc DL(Op); - const GlobalValue *GV = N->getGlobal(); - SDValue GA = DAG.getTargetGlobalAddress(GV, DL, MVT::i64); +SDValue BPFTargetLowering::LowerConstantPool(SDValue Op, + SelectionDAG &DAG) const { + ConstantPoolSDNode *N = cast<ConstantPoolSDNode>(Op); - return DAG.getNode(BPFISD::Wrapper, DL, MVT::i64, GA); + return getAddr(N, DAG); } unsigned diff --git a/llvm/lib/Target/BPF/BPFISelLowering.h b/llvm/lib/Target/BPF/BPFISelLowering.h index 819711b..42707949e 100644 --- a/llvm/lib/Target/BPF/BPFISelLowering.h +++ b/llvm/lib/Target/BPF/BPFISelLowering.h @@ -77,8 +77,13 @@ private: SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const; SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG) const; SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const; + + SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) const; SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const; + template <class NodeTy> + SDValue getAddr(NodeTy *N, SelectionDAG &DAG, unsigned Flags = 0) const; + // Lower the result values of a call, copying them out of physregs into vregs SDValue LowerCallResult(SDValue Chain, SDValue InGlue, CallingConv::ID CallConv, bool IsVarArg, diff --git a/llvm/lib/Target/BPF/BPFInstrInfo.td b/llvm/lib/Target/BPF/BPFInstrInfo.td index 690d534..82d3470 100644 --- a/llvm/lib/Target/BPF/BPFInstrInfo.td +++ b/llvm/lib/Target/BPF/BPFInstrInfo.td @@ -727,6 +727,7 @@ let usesCustomInserter = 1, isCodeGenOnly = 1 in { // load 64-bit global addr into register def : Pat<(BPFWrapper tglobaladdr:$in), (LD_imm64 tglobaladdr:$in)>; +def : Pat<(BPFWrapper tconstpool:$in), (LD_imm64 tconstpool:$in)>; // 0xffffFFFF doesn't fit into simm32, optimize common case def : Pat<(i64 (and (i64 GPR:$src), 0xffffFFFF)), diff --git a/llvm/lib/Target/BPF/BPFMCInstLower.cpp b/llvm/lib/Target/BPF/BPFMCInstLower.cpp index 2ce9c38..040a1fb 100644 --- a/llvm/lib/Target/BPF/BPFMCInstLower.cpp +++ b/llvm/lib/Target/BPF/BPFMCInstLower.cpp @@ -74,6 +74,9 @@ void BPFMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const { case MachineOperand::MO_GlobalAddress: MCOp = LowerSymbolOperand(MO, GetGlobalAddressSymbol(MO)); break; + case MachineOperand::MO_ConstantPoolIndex: + MCOp = LowerSymbolOperand(MO, Printer.GetCPISymbol(MO.getIndex())); + break; } OutMI.addOperand(MCOp); |