diff options
Diffstat (limited to 'lib/Target/SystemZ/SystemZISelLowering.h')
| -rw-r--r-- | lib/Target/SystemZ/SystemZISelLowering.h | 109 |
1 files changed, 95 insertions, 14 deletions
diff --git a/lib/Target/SystemZ/SystemZISelLowering.h b/lib/Target/SystemZ/SystemZISelLowering.h index c0dbe49..c6dcca6 100644 --- a/lib/Target/SystemZ/SystemZISelLowering.h +++ b/lib/Target/SystemZ/SystemZISelLowering.h @@ -32,17 +32,32 @@ namespace SystemZISD { // is the target address. The arguments start at operand 2. // There is an optional glue operand at the end. CALL, + SIBCALL, // Wraps a TargetGlobalAddress that should be loaded using PC-relative // accesses (LARL). Operand 0 is the address. PCREL_WRAPPER, - // Signed integer and floating-point comparisons. The operands are the - // two values to compare. - CMP, + // Used in cases where an offset is applied to a TargetGlobalAddress. + // Operand 0 is the full TargetGlobalAddress and operand 1 is a + // PCREL_WRAPPER for an anchor point. This is used so that we can + // cheaply refer to either the full address or the anchor point + // as a register base. + PCREL_OFFSET, - // Likewise unsigned integer comparison. - UCMP, + // Integer comparisons. There are three operands: the two values + // to compare, and an integer of type SystemZICMP. + ICMP, + + // Floating-point comparisons. The two operands are the values to compare. + FCMP, + + // Test under mask. The first operand is ANDed with the second operand + // and the condition codes are set on the result. The third operand is + // a boolean that is true if the condition codes need to distinguish + // between CCMASK_TM_MIXED_MSB_0 and CCMASK_TM_MIXED_MSB_1 (which the + // register forms do but the memory forms don't). + TM, // Branches if a condition is true. Operand 0 is the chain operand; // operand 1 is the 4-bit condition-code mask, with bit N in @@ -73,13 +88,50 @@ namespace SystemZISD { UDIVREM32, UDIVREM64, - // Use MVC to copy bytes from one memory location to another. - // The first operand is the target address, the second operand is the - // source address, and the third operand is the constant length. + // Use a series of MVCs to copy bytes from one memory location to another. + // The operands are: + // - the target address + // - the source address + // - the constant length + // // This isn't a memory opcode because we'd need to attach two // MachineMemOperands rather than one. MVC, + // Like MVC, but implemented as a loop that handles X*256 bytes + // followed by straight-line code to handle the rest (if any). + // The value of X is passed as an additional operand. + MVC_LOOP, + + // Similar to MVC and MVC_LOOP, but for logic operations (AND, OR, XOR). + NC, + NC_LOOP, + OC, + OC_LOOP, + XC, + XC_LOOP, + + // Use CLC to compare two blocks of memory, with the same comments + // as for MVC and MVC_LOOP. + CLC, + CLC_LOOP, + + // Use an MVST-based sequence to implement stpcpy(). + STPCPY, + + // Use a CLST-based sequence to implement strcmp(). The two input operands + // are the addresses of the strings to compare. + STRCMP, + + // Use an SRST-based sequence to search a block of memory. The first + // operand is the end address, the second is the start, and the third + // is the character to search for. CC is set to 1 on success and 2 + // on failure. + SEARCH_STRING, + + // Store the CC value in bits 29 and 28 of an integer. + IPM, + // Wrappers around the inner loop of an 8- or 16-bit ATOMIC_SWAP or // ATOMIC_LOAD_<op>. // @@ -111,7 +163,27 @@ namespace SystemZISD { // operand into the high bits // Operand 4: the negative of operand 2, for rotating the other way // Operand 5: the width of the field in bits (8 or 16) - ATOMIC_CMP_SWAPW + ATOMIC_CMP_SWAPW, + + // Prefetch from the second operand using the 4-bit control code in + // the first operand. The code is 1 for a load prefetch and 2 for + // a store prefetch. + PREFETCH + }; + + // Return true if OPCODE is some kind of PC-relative address. + inline bool isPCREL(unsigned Opcode) { + return Opcode == PCREL_WRAPPER || Opcode == PCREL_OFFSET; + } +} + +namespace SystemZICMP { + // Describes whether an integer comparison needs to be signed or unsigned, + // or whether either type is OK. + enum { + Any, + UnsignedOnly, + SignedOnly }; } @@ -126,15 +198,15 @@ public: virtual MVT getScalarShiftAmountTy(EVT LHSTy) const LLVM_OVERRIDE { return MVT::i32; } - virtual EVT getSetCCResultType(LLVMContext &, EVT) const LLVM_OVERRIDE { - return MVT::i32; - } + virtual EVT getSetCCResultType(LLVMContext &, EVT) const LLVM_OVERRIDE; virtual bool isFMAFasterThanFMulAndFAdd(EVT VT) const LLVM_OVERRIDE; virtual bool isFPImmLegal(const APFloat &Imm, EVT VT) const LLVM_OVERRIDE; virtual bool isLegalAddressingMode(const AddrMode &AM, Type *Ty) const LLVM_OVERRIDE; virtual bool allowsUnalignedMemoryAccesses(EVT VT, bool *Fast) const LLVM_OVERRIDE; + virtual bool isTruncateFree(Type *, Type *) const LLVM_OVERRIDE; + virtual bool isTruncateFree(EVT, EVT) const LLVM_OVERRIDE; virtual const char *getTargetNodeName(unsigned Opcode) const LLVM_OVERRIDE; virtual std::pair<unsigned, const TargetRegisterClass *> getRegForInlineAsmConstraint(const std::string &Constraint, @@ -154,6 +226,8 @@ public: MachineBasicBlock *BB) const LLVM_OVERRIDE; virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const LLVM_OVERRIDE; + virtual bool allowTruncateForTailCall(Type *, Type *) const LLVM_OVERRIDE; + virtual bool mayBeEmittedAsTailCall(CallInst *CI) const LLVM_OVERRIDE; virtual SDValue LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv, bool isVarArg, @@ -176,6 +250,7 @@ private: const SystemZTargetMachine &TM; // Implement LowerOperation for individual opcodes. + SDValue lowerSETCC(SDValue Op, SelectionDAG &DAG) const; SDValue lowerBR_CC(SDValue Op, SelectionDAG &DAG) const; SDValue lowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const; SDValue lowerGlobalAddress(GlobalAddressSDNode *Node, @@ -189,6 +264,7 @@ private: SDValue lowerVASTART(SDValue Op, SelectionDAG &DAG) const; SDValue lowerVACOPY(SDValue Op, SelectionDAG &DAG) const; SDValue lowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const; + SDValue lowerSMUL_LOHI(SDValue Op, SelectionDAG &DAG) const; SDValue lowerUMUL_LOHI(SDValue Op, SelectionDAG &DAG) const; SDValue lowerSDIVREM(SDValue Op, SelectionDAG &DAG) const; SDValue lowerUDIVREM(SDValue Op, SelectionDAG &DAG) const; @@ -199,6 +275,7 @@ private: SDValue lowerATOMIC_CMP_SWAP(SDValue Op, SelectionDAG &DAG) const; SDValue lowerSTACKSAVE(SDValue Op, SelectionDAG &DAG) const; SDValue lowerSTACKRESTORE(SDValue Op, SelectionDAG &DAG) const; + SDValue lowerPREFETCH(SDValue Op, SelectionDAG &DAG) const; // If the last instruction before MBBI in MBB was some form of COMPARE, // try to replace it with a COMPARE AND BRANCH just before MBBI. @@ -230,8 +307,12 @@ private: unsigned BitSize) const; MachineBasicBlock *emitAtomicCmpSwapW(MachineInstr *MI, MachineBasicBlock *BB) const; - MachineBasicBlock *emitMVCWrapper(MachineInstr *MI, - MachineBasicBlock *BB) const; + MachineBasicBlock *emitMemMemWrapper(MachineInstr *MI, + MachineBasicBlock *BB, + unsigned Opcode) const; + MachineBasicBlock *emitStringWrapper(MachineInstr *MI, + MachineBasicBlock *BB, + unsigned Opcode) const; }; } // end namespace llvm |