+ struct ConstraintInfo {
+ /// Type - The basic type of the constraint: input/output/clobber
+ ///
+ ConstraintPrefix Type;
+
+ /// isEarlyClobber - "&": output operand writes result before inputs are all
+ /// read. This is only ever set for an output operand.
+ bool isEarlyClobber;
+
+ /// hasMatchingInput - This is set to true for an output constraint iff
+ /// there is an input constraint that is required to match it (e.g. "0").
+ bool hasMatchingInput;
+
+ /// isCommutative - This is set to true for a constraint that is commutative
+ /// with the next operand.
+ bool isCommutative;
+
+ /// 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.
+ bool isIndirect;
+
+ /// Code - The constraint code, either the register name (in braces) or the
+ /// constraint letter/number.
+ std::vector<std::string> Codes;
+
+ /// 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.
+ bool Parse(const std::string &Str,
+ std::vector<InlineAsm::ConstraintInfo> &ConstraintsSoFar);
+ };
+
+ /// ParseConstraints - Split up the constraint string into the specific
+ /// constraints and their prefixes. If this returns an empty vector, and if
+ /// the constraint string itself isn't empty, there was an error parsing.
+ static std::vector<ConstraintInfo>
+ ParseConstraints(const std::string &ConstraintString);
+
+ /// ParseConstraints - Parse the constraints of this inlineasm object,
+ /// returning them the same way that ParseConstraints(str) does.
+ std::vector<ConstraintInfo>
+ ParseConstraints() const {
+ return ParseConstraints(Constraints);
+ }