diff options
Diffstat (limited to 'llvm/lib/Target')
| -rw-r--r-- | llvm/lib/Target/Mips/MipsISelLowering.cpp | 39 | ||||
| -rw-r--r-- | llvm/lib/Target/Mips/MipsISelLowering.h | 9 |
2 files changed, 48 insertions, 0 deletions
diff --git a/llvm/lib/Target/Mips/MipsISelLowering.cpp b/llvm/lib/Target/Mips/MipsISelLowering.cpp index be22fed2f45..13665ee89a9 100644 --- a/llvm/lib/Target/Mips/MipsISelLowering.cpp +++ b/llvm/lib/Target/Mips/MipsISelLowering.cpp @@ -3039,6 +3039,10 @@ MipsTargetLowering::getSingleConstraintMatchWeight( if (type->isFloatTy()) weight = CW_Register; break; + case 'I': // signed 16 bit immediate + if (isa<ConstantInt>(CallOperandVal)) + weight = CW_Constant; + break; } return weight; } @@ -3073,6 +3077,41 @@ getRegForInlineAsmConstraint(const std::string &Constraint, EVT VT) const return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT); } +/// LowerAsmOperandForConstraint - Lower the specified operand into the Ops +/// vector. If it is invalid, don't add anything to Ops. +void MipsTargetLowering::LowerAsmOperandForConstraint(SDValue Op, + std::string &Constraint, + std::vector<SDValue>&Ops, + SelectionDAG &DAG) const { + SDValue Result(0, 0); + + // Only support length 1 constraints for now. + if (Constraint.length() > 1) return; + + char ConstraintLetter = Constraint[0]; + switch (ConstraintLetter) { + default: break; // This will fall through to the generic implementation + case 'I': // Signed 16 bit constant + // If this fails, the parent routine will give an error + if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) { + EVT Type = Op.getValueType(); + int64_t Val = C->getSExtValue(); + if (isInt<16>(Val)) { + Result = DAG.getTargetConstant(Val, Type); + break; + } + } + return; + } + + if (Result.getNode()) { + Ops.push_back(Result); + return; + } + + TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG); +} + bool MipsTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const { // The Mips target isn't yet aware of offsets. diff --git a/llvm/lib/Target/Mips/MipsISelLowering.h b/llvm/lib/Target/Mips/MipsISelLowering.h index c36f40f639f..f95e0dc47ee 100644 --- a/llvm/lib/Target/Mips/MipsISelLowering.h +++ b/llvm/lib/Target/Mips/MipsISelLowering.h @@ -176,6 +176,15 @@ namespace llvm { getRegForInlineAsmConstraint(const std::string &Constraint, EVT VT) const; + /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops + /// vector. If it is invalid, don't add anything to Ops. If hasMemory is + /// true it means one of the asm constraint of the inline asm instruction + /// being processed is 'm'. + virtual void LowerAsmOperandForConstraint(SDValue Op, + std::string &Constraint, + std::vector<SDValue> &Ops, + SelectionDAG &DAG) const; + virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const; /// isFPImmLegal - Returns true if the target can instruction select the |
