diff options
Diffstat (limited to 'lib/Target/ARM/ARMISelLowering.cpp')
-rw-r--r-- | lib/Target/ARM/ARMISelLowering.cpp | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp index 8509387..39f8f05 100644 --- a/lib/Target/ARM/ARMISelLowering.cpp +++ b/lib/Target/ARM/ARMISelLowering.cpp @@ -5441,6 +5441,40 @@ ARMTargetLowering::getConstraintType(const std::string &Constraint) const { return TargetLowering::getConstraintType(Constraint); } +/// Examine constraint type and operand type and determine a weight value. +/// This object must already have been set up with the operand type +/// and the current alternative constraint selected. +TargetLowering::ConstraintWeight +ARMTargetLowering::getSingleConstraintMatchWeight( + AsmOperandInfo &info, const char *constraint) const { + ConstraintWeight weight = CW_Invalid; + Value *CallOperandVal = info.CallOperandVal; + // If we don't have a value, we can't do a match, + // but allow it at the lowest weight. + if (CallOperandVal == NULL) + return CW_Default; + const Type *type = CallOperandVal->getType(); + // Look at the constraint type. + switch (*constraint) { + default: + weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint); + break; + case 'l': + if (type->isIntegerTy()) { + if (Subtarget->isThumb()) + weight = CW_SpecificReg; + else + weight = CW_Register; + } + break; + case 'w': + if (type->isFloatingPointTy()) + weight = CW_Register; + break; + } + return weight; +} + std::pair<unsigned, const TargetRegisterClass*> ARMTargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint, EVT VT) const { |