本文整理汇总了C++中ConstraintInfo::hasTiedOperand方法的典型用法代码示例。如果您正苦于以下问题：C++ ConstraintInfo::hasTiedOperand方法的具体用法？C++ ConstraintInfo::hasTiedOperand怎么用？C++ ConstraintInfo::hasTiedOperand使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ConstraintInfo的用法示例。
在下文中一共展示了ConstraintInfo::hasTiedOperand方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: validateInputConstraint
bool TargetInfo::validateInputConstraint(
MutableArrayRef<ConstraintInfo> OutputConstraints,
ConstraintInfo &Info) const {
const char *Name = Info.ConstraintStr.c_str();
if (!*Name)
return false;
while (*Name) {
switch (*Name) {
default:
// Check if we have a matching constraint
if (*Name >= '0' && *Name <= '9') {
const char *DigitStart = Name;
while (Name[1] >= '0' && Name[1] <= '9')
Name++;
const char *DigitEnd = Name;
unsigned i;
if (StringRef(DigitStart, DigitEnd - DigitStart + 1)
.getAsInteger(10, i))
return false;
// Check if matching constraint is out of bounds.
if (i >= OutputConstraints.size()) return false;
// A number must refer to an output only operand.
if (OutputConstraints[i].isReadWrite())
return false;
// If the constraint is already tied, it must be tied to the
// same operand referenced to by the number.
if (Info.hasTiedOperand() && Info.getTiedOperand() != i)
return false;
// The constraint should have the same info as the respective
// output constraint.
Info.setTiedOperand(i, OutputConstraints[i]);
} else if (!validateAsmConstraint(Name, Info)) {
// FIXME: This error return is in place temporarily so we can
// add more constraints as we hit it. Eventually, an unknown
// constraint should just be treated as 'g'.
return false;
}
break;
case '[': {
unsigned Index = 0;
if (!resolveSymbolicName(Name, OutputConstraints, Index))
return false;
// If the constraint is already tied, it must be tied to the
// same operand referenced to by the number.
if (Info.hasTiedOperand() && Info.getTiedOperand() != Index)
return false;
// A number must refer to an output only operand.
if (OutputConstraints[Index].isReadWrite())
return false;
Info.setTiedOperand(Index, OutputConstraints[Index]);
break;
}
case '%': // commutative
// FIXME: Fail if % is used with the last operand.
break;
case 'i': // immediate integer.
case 'n': // immediate integer with a known value.
break;
case 'I': // Various constant constraints with target-specific meanings.
case 'J':
case 'K':
case 'L':
case 'M':
case 'N':
case 'O':
case 'P':
if (!validateAsmConstraint(Name, Info))
return false;
break;
case 'r': // general register.
Info.setAllowsRegister();
break;
case 'm': // memory operand.
case 'o': // offsettable memory operand.
case 'V': // non-offsettable memory operand.
case '<': // autodecrement memory operand.
case '>': // autoincrement memory operand.
Info.setAllowsMemory();
break;
case 'g': // general register, memory operand or immediate integer.
case 'X': // any operand.
Info.setAllowsRegister();
Info.setAllowsMemory();
break;
case 'E': // immediate floating point.
case 'F': // immediate floating point.
case 'p': // address operand.
break;
case ',': // multiple alternative constraint. Ignore comma.
break;
case '#': // Ignore as constraint.
//.........这里部分代码省略.........