llvm::InlineAsm::ConstraintInfo Struct Reference

#include <InlineAsm.h>

Inheritance diagram for llvm::InlineAsm::ConstraintInfo:

Collaboration diagram for llvm::InlineAsm::ConstraintInfo:

Public Member Functions
bool	hasMatchingInput () const
	ConstraintInfo ()
	Default constructor. More...
	ConstraintInfo (const ConstraintInfo &other)
	Copy constructor. More...
bool	Parse (StringRef Str, ConstraintInfoVector &ConstraintsSoFar)
void	selectAlternative (unsigned index)

Public Attributes
ConstraintPrefix	Type
bool	isEarlyClobber
signed char	MatchingInput
bool	isCommutative
bool	isIndirect
ConstraintCodeVector	Codes
bool	isMultipleAlternative
	isMultipleAlternative - '|': has multiple-alternative constraints. More...
SubConstraintInfoVector	multipleAlternatives
unsigned	currentAlternativeIndex
	The currently selected alternative constraint index. More...

Detailed Description

Definition at line 121 of file InlineAsm.h.

Constructor & Destructor Documentation

InlineAsm::ConstraintInfo::ConstraintInfo

(

)

Default constructor.

Definition at line 60 of file InlineAsm.cpp.

InlineAsm::ConstraintInfo::ConstraintInfo

(

const ConstraintInfo &

other

)

Copy constructor.

Definition at line 68 of file InlineAsm.cpp.

Member Function Documentation

bool llvm::InlineAsm::ConstraintInfo::hasMatchingInput ( ) const

inline

hasMatchingInput - Return true if this is an output constraint that has a matching input constraint.

Definition at line 138 of file InlineAsm.h.

References MatchingInput.

Referenced by ChooseConstraint(), and llvm::TargetLowering::ParseConstraints().

bool InlineAsm::ConstraintInfo::Parse	(	StringRef	Str,
		InlineAsm::ConstraintInfoVector &	ConstraintsSoFar
	)

Parse - Analyze the specified string (e.g. "=*&{eax}") and fill in the fields in this structure. If the constraint string is not understood, return true, otherwise return false.

Parse - Analyze the specified string (e.g. "==&{eax}") and fill in the fields in this structure. If the constraint string is not understood, return true, otherwise return false.

Definition at line 80 of file InlineAsm.cpp.

References llvm::LibFunc::atoi, llvm::StringRef::begin(), llvm::StringRef::count(), llvm::StringRef::end(), I, llvm::InlineAsm::isClobber, llvm::LibFunc::isdigit, llvm::InlineAsm::isInput, llvm::InlineAsm::isOutput, llvm::InlineAsm::SubConstraintInfo::MatchingInput, and N.

Referenced by llvm::InlineAsm::ParseConstraints().

void InlineAsm::ConstraintInfo::selectAlternative

(

unsigned

index

)

selectAlternative - Point this constraint to the alternative constraint indicated by the index.

Definition at line 202 of file InlineAsm.cpp.

References llvm::InlineAsm::SubConstraintInfo::Codes, and llvm::InlineAsm::SubConstraintInfo::MatchingInput.

Referenced by llvm::TargetLowering::ParseConstraints().

Member Data Documentation

ConstraintCodeVector llvm::InlineAsm::ConstraintInfo::Codes

Code - The constraint code, either the register name (in braces) or the constraint letter/number.

Definition at line 152 of file InlineAsm.h.

Referenced by ChooseConstraint(), llvm::TargetLowering::ComputeConstraintToUse(), llvm::TargetLowering::getMultipleConstraintMatchWeight(), and llvm::hasInlineAsmMemConstraint().

unsigned llvm::InlineAsm::ConstraintInfo::currentAlternativeIndex

The currently selected alternative constraint index.

Definition at line 162 of file InlineAsm.h.

bool llvm::InlineAsm::ConstraintInfo::isCommutative

isCommutative - This is set to true for a constraint that is commutative with the next operand.

Definition at line 142 of file InlineAsm.h.

bool llvm::InlineAsm::ConstraintInfo::isEarlyClobber

isEarlyClobber - "&": output operand writes result before inputs are all read. This is only ever set for an output operand.

Definition at line 128 of file InlineAsm.h.

bool llvm::InlineAsm::ConstraintInfo::isIndirect

isIndirect - True if this operand is an indirect operand. This means that the address of the source or destination is present in the call instruction, instead of it being returned or passed in explicitly. This is represented with a '*' in the asm string.

Definition at line 148 of file InlineAsm.h.

Referenced by llvm::hasInlineAsmMemConstraint(), and llvm::TargetLowering::ParseConstraints().

bool llvm::InlineAsm::ConstraintInfo::isMultipleAlternative

isMultipleAlternative - '|': has multiple-alternative constraints.

Definition at line 155 of file InlineAsm.h.

signed char llvm::InlineAsm::ConstraintInfo::MatchingInput

MatchingInput - If this is not -1, this is an output constraint where an input constraint is required to match it (e.g. "0"). The value is the constraint number that matches this one (for example, if this is constraint #0 and constraint #4 has the value "0", this will be 4).

Definition at line 134 of file InlineAsm.h.

Referenced by hasMatchingInput(), and llvm::TargetLowering::ParseConstraints().

SubConstraintInfoVector llvm::InlineAsm::ConstraintInfo::multipleAlternatives

multipleAlternatives - If there are multiple alternative constraints, this array will contain them. Otherwise it will be empty.

Definition at line 159 of file InlineAsm.h.

Referenced by llvm::TargetLowering::getMultipleConstraintMatchWeight(), and llvm::TargetLowering::ParseConstraints().

ConstraintPrefix llvm::InlineAsm::ConstraintInfo::Type

Type - The basic type of the constraint: input/output/clobber

Definition at line 124 of file InlineAsm.h.

Referenced by llvm::TargetLowering::ParseConstraints().

---

The documentation for this struct was generated from the following files:

• InlineAsm.h
• InlineAsm.cpp