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Add interfaces to lower varargs and return/frame address intrinsics.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19406 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-01-09 00:00:31 +00:00
parent b56013dda5
commit f19ae7df65
1 changed files with 31 additions and 0 deletions
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31
include/llvm/Target/TargetLowering.h
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@ -172,6 +172,37 @@ public:
virtual std::pair<SDOperand, SDOperand>
LowerCallTo(SDOperand Chain, const Type *RetTy, SDOperand Callee,
ArgListTy &Args, SelectionDAG &DAG) = 0;
/// LowerVAStart - This lowers the llvm.va_start intrinsic. If not
/// implemented, this method prints a message and aborts.
virtual std::pair<SDOperand, SDOperand>
LowerVAStart(SDOperand Chain, SelectionDAG &DAG);
/// LowerVAEnd - This lowers llvm.va_end and returns the resultant chain. If
/// not implemented, this defaults to a noop.
virtual SDOperand LowerVAEnd(SDOperand Chain, SDOperand L, SelectionDAG &DAG);
/// LowerVACopy - This lowers llvm.va_copy and returns the resultant
/// value/chain pair. If not implemented, this defaults to returning the
/// input operand.
virtual std::pair<SDOperand,SDOperand>
LowerVACopy(SDOperand Chain, SDOperand L, SelectionDAG &DAG);
/// LowerVAArgNext - This lowers the vaarg and vanext instructions (depending
/// on whether the first argument is true). If not implemented, this prints a
/// message and aborts.
virtual std::pair<SDOperand,SDOperand>
LowerVAArgNext(bool isVANext, SDOperand Chain, SDOperand VAList,
const Type *ArgTy, SelectionDAG &DAG);
/// LowerFrameReturnAddress - This hook lowers a call to llvm.returnaddress or
/// llvm.frameaddress (depending on the value of the first argument). The
/// return values are the result pointer and the resultant token chain. If
/// not implemented, both of these intrinsics will return null.
virtual std::pair<SDOperand, SDOperand>
LowerFrameReturnAddress(bool isFrameAddr, SDOperand Chain, unsigned Depth,
SelectionDAG &DAG);
};
} // end llvm namespace