#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/AddressSpaces.h"
#include "clang/Basic/CharInfo.h"
#include "clang/Basic/LangOptions.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/ErrorHandling.h"
#include <cstdlib>
using namespace clang;
static const LangAS::Map DefaultAddrSpaceMap = { 0 };
TargetInfo::TargetInfo(const llvm::Triple &T) : TargetOpts(), Triple(T) {
BigEndian = true;
TLSSupported = true;
NoAsmVariants = false;
PointerWidth = PointerAlign = 32;
BoolWidth = BoolAlign = 8;
IntWidth = IntAlign = 32;
LongWidth = LongAlign = 32;
LongLongWidth = LongLongAlign = 64;
SuitableAlign = 64;
DefaultAlignForAttributeAligned = 128;
MinGlobalAlign = 0;
HalfWidth = 16;
HalfAlign = 16;
FloatWidth = 32;
FloatAlign = 32;
DoubleWidth = 64;
DoubleAlign = 64;
LongDoubleWidth = 64;
LongDoubleAlign = 64;
LargeArrayMinWidth = 0;
LargeArrayAlign = 0;
MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 0;
MaxVectorAlign = 0;
MaxTLSAlign = 0;
SimdDefaultAlign = 0;
SizeType = UnsignedLong;
PtrDiffType = SignedLong;
IntMaxType = SignedLongLong;
IntPtrType = SignedLong;
WCharType = SignedInt;
WIntType = SignedInt;
Char16Type = UnsignedShort;
Char32Type = UnsignedInt;
Int64Type = SignedLongLong;
SigAtomicType = SignedInt;
ProcessIDType = SignedInt;
UseSignedCharForObjCBool = true;
UseBitFieldTypeAlignment = true;
UseZeroLengthBitfieldAlignment = false;
ZeroLengthBitfieldBoundary = 0;
HalfFormat = &llvm::APFloat::IEEEhalf;
FloatFormat = &llvm::APFloat::IEEEsingle;
DoubleFormat = &llvm::APFloat::IEEEdouble;
LongDoubleFormat = &llvm::APFloat::IEEEdouble;
DataLayoutString = nullptr;
UserLabelPrefix = "_";
MCountName = "mcount";
RegParmMax = 0;
SSERegParmMax = 0;
HasAlignMac68kSupport = false;
HasBuiltinMSVaList = false;
RealTypeUsesObjCFPRet = 0;
ComplexLongDoubleUsesFP2Ret = false;
TheCXXABI.set(Triple.isKnownWindowsMSVCEnvironment()
? TargetCXXABI::Microsoft
: TargetCXXABI::GenericItanium);
AddrSpaceMap = &DefaultAddrSpaceMap;
UseAddrSpaceMapMangling = false;
PlatformName = "unknown";
PlatformMinVersion = VersionTuple();
}
TargetInfo::~TargetInfo() {}
const char *TargetInfo::getTypeName(IntType T) {
switch (T) {
default: llvm_unreachable("not an integer!");
case SignedChar: return "signed char";
case UnsignedChar: return "unsigned char";
case SignedShort: return "short";
case UnsignedShort: return "unsigned short";
case SignedInt: return "int";
case UnsignedInt: return "unsigned int";
case SignedLong: return "long int";
case UnsignedLong: return "long unsigned int";
case SignedLongLong: return "long long int";
case UnsignedLongLong: return "long long unsigned int";
}
}
const char *TargetInfo::getTypeConstantSuffix(IntType T) const {
switch (T) {
default: llvm_unreachable("not an integer!");
case SignedChar:
case SignedShort:
case SignedInt: return "";
case SignedLong: return "L";
case SignedLongLong: return "LL";
case UnsignedChar:
if (getCharWidth() < getIntWidth())
return "";
case UnsignedShort:
if (getShortWidth() < getIntWidth())
return "";
case UnsignedInt: return "U";
case UnsignedLong: return "UL";
case UnsignedLongLong: return "ULL";
}
}
const char *TargetInfo::getTypeFormatModifier(IntType T) {
switch (T) {
default: llvm_unreachable("not an integer!");
case SignedChar:
case UnsignedChar: return "hh";
case SignedShort:
case UnsignedShort: return "h";
case SignedInt:
case UnsignedInt: return "";
case SignedLong:
case UnsignedLong: return "l";
case SignedLongLong:
case UnsignedLongLong: return "ll";
}
}
unsigned TargetInfo::getTypeWidth(IntType T) const {
switch (T) {
default: llvm_unreachable("not an integer!");
case SignedChar:
case UnsignedChar: return getCharWidth();
case SignedShort:
case UnsignedShort: return getShortWidth();
case SignedInt:
case UnsignedInt: return getIntWidth();
case SignedLong:
case UnsignedLong: return getLongWidth();
case SignedLongLong:
case UnsignedLongLong: return getLongLongWidth();
};
}
TargetInfo::IntType TargetInfo::getIntTypeByWidth(
unsigned BitWidth, bool IsSigned) const {
if (getCharWidth() == BitWidth)
return IsSigned ? SignedChar : UnsignedChar;
if (getShortWidth() == BitWidth)
return IsSigned ? SignedShort : UnsignedShort;
if (getIntWidth() == BitWidth)
return IsSigned ? SignedInt : UnsignedInt;
if (getLongWidth() == BitWidth)
return IsSigned ? SignedLong : UnsignedLong;
if (getLongLongWidth() == BitWidth)
return IsSigned ? SignedLongLong : UnsignedLongLong;
return NoInt;
}
TargetInfo::IntType TargetInfo::getLeastIntTypeByWidth(unsigned BitWidth,
bool IsSigned) const {
if (getCharWidth() >= BitWidth)
return IsSigned ? SignedChar : UnsignedChar;
if (getShortWidth() >= BitWidth)
return IsSigned ? SignedShort : UnsignedShort;
if (getIntWidth() >= BitWidth)
return IsSigned ? SignedInt : UnsignedInt;
if (getLongWidth() >= BitWidth)
return IsSigned ? SignedLong : UnsignedLong;
if (getLongLongWidth() >= BitWidth)
return IsSigned ? SignedLongLong : UnsignedLongLong;
return NoInt;
}
TargetInfo::RealType TargetInfo::getRealTypeByWidth(unsigned BitWidth) const {
if (getFloatWidth() == BitWidth)
return Float;
if (getDoubleWidth() == BitWidth)
return Double;
switch (BitWidth) {
case 96:
if (&getLongDoubleFormat() == &llvm::APFloat::x87DoubleExtended)
return LongDouble;
break;
case 128:
if (&getLongDoubleFormat() == &llvm::APFloat::PPCDoubleDouble ||
&getLongDoubleFormat() == &llvm::APFloat::IEEEquad)
return LongDouble;
break;
}
return NoFloat;
}
unsigned TargetInfo::getTypeAlign(IntType T) const {
switch (T) {
default: llvm_unreachable("not an integer!");
case SignedChar:
case UnsignedChar: return getCharAlign();
case SignedShort:
case UnsignedShort: return getShortAlign();
case SignedInt:
case UnsignedInt: return getIntAlign();
case SignedLong:
case UnsignedLong: return getLongAlign();
case SignedLongLong:
case UnsignedLongLong: return getLongLongAlign();
};
}
bool TargetInfo::isTypeSigned(IntType T) {
switch (T) {
default: llvm_unreachable("not an integer!");
case SignedChar:
case SignedShort:
case SignedInt:
case SignedLong:
case SignedLongLong:
return true;
case UnsignedChar:
case UnsignedShort:
case UnsignedInt:
case UnsignedLong:
case UnsignedLongLong:
return false;
};
}
void TargetInfo::adjust(const LangOptions &Opts) {
if (Opts.NoBitFieldTypeAlign)
UseBitFieldTypeAlignment = false;
if (Opts.ShortWChar)
WCharType = UnsignedShort;
if (Opts.OpenCL) {
IntWidth = IntAlign = 32;
LongWidth = LongAlign = 64;
LongLongWidth = LongLongAlign = 128;
HalfWidth = HalfAlign = 16;
FloatWidth = FloatAlign = 32;
if (DoubleWidth != FloatWidth) {
DoubleWidth = DoubleAlign = 64;
DoubleFormat = &llvm::APFloat::IEEEdouble;
}
LongDoubleWidth = LongDoubleAlign = 128;
assert(PointerWidth == 32 || PointerWidth == 64);
bool Is32BitArch = PointerWidth == 32;
SizeType = Is32BitArch ? UnsignedInt : UnsignedLong;
PtrDiffType = Is32BitArch ? SignedInt : SignedLong;
IntPtrType = Is32BitArch ? SignedInt : SignedLong;
IntMaxType = SignedLongLong;
Int64Type = SignedLong;
HalfFormat = &llvm::APFloat::IEEEhalf;
FloatFormat = &llvm::APFloat::IEEEsingle;
LongDoubleFormat = &llvm::APFloat::IEEEquad;
}
}
bool TargetInfo::initFeatureMap(
llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags, StringRef CPU,
const std::vector<std::string> &FeatureVec) const {
for (const auto &F : FeatureVec) {
StringRef Name = F;
bool Enabled = Name[0] == '+';
setFeatureEnabled(Features, Name.substr(1), Enabled);
}
return true;
}
static StringRef removeGCCRegisterPrefix(StringRef Name) {
if (Name[0] == '%' || Name[0] == '#')
Name = Name.substr(1);
return Name;
}
bool TargetInfo::isValidClobber(StringRef Name) const {
return (isValidGCCRegisterName(Name) ||
Name == "memory" || Name == "cc");
}
bool TargetInfo::isValidGCCRegisterName(StringRef Name) const {
if (Name.empty())
return false;
Name = removeGCCRegisterPrefix(Name);
if (Name.empty())
return false;
ArrayRef<const char *> Names = getGCCRegNames();
if (isDigit(Name[0])) {
unsigned n;
if (!Name.getAsInteger(0, n))
return n < Names.size();
}
if (std::find(Names.begin(), Names.end(), Name) != Names.end())
return true;
for (const AddlRegName &ARN : getGCCAddlRegNames())
for (const char *AN : ARN.Names) {
if (!AN)
break;
if (AN == Name && ARN.RegNum < Names.size())
return true;
}
for (const GCCRegAlias &GRA : getGCCRegAliases())
for (const char *A : GRA.Aliases) {
if (!A)
break;
if (A == Name)
return true;
}
return false;
}
StringRef
TargetInfo::getNormalizedGCCRegisterName(StringRef Name) const {
assert(isValidGCCRegisterName(Name) && "Invalid register passed in");
Name = removeGCCRegisterPrefix(Name);
ArrayRef<const char *> Names = getGCCRegNames();
if (isDigit(Name[0])) {
unsigned n;
if (!Name.getAsInteger(0, n)) {
assert(n < Names.size() && "Out of bounds register number!");
return Names[n];
}
}
for (const AddlRegName &ARN : getGCCAddlRegNames())
for (const char *AN : ARN.Names) {
if (!AN)
break;
if (AN == Name && ARN.RegNum < Names.size())
return Name;
}
for (const GCCRegAlias &RA : getGCCRegAliases())
for (const char *A : RA.Aliases) {
if (!A)
break;
if (A == Name)
return RA.Register;
}
return Name;
}
bool TargetInfo::validateOutputConstraint(ConstraintInfo &Info) const {
const char *Name = Info.getConstraintStr().c_str();
if (*Name != '=' && *Name != '+')
return false;
if (*Name == '+')
Info.setIsReadWrite();
Name++;
while (*Name) {
switch (*Name) {
default:
if (!validateAsmConstraint(Name, Info)) {
return false;
}
break;
case '&': Info.setEarlyClobber();
break;
case '%': break;
case 'r': Info.setAllowsRegister();
break;
case 'm': case 'o': case 'V': case '<': case '>': Info.setAllowsMemory();
break;
case 'g': case 'X': Info.setAllowsRegister();
Info.setAllowsMemory();
break;
case ',': if (Name[1] == '=' || Name[1] == '+')
Name++;
break;
case '#': while (Name[1] && Name[1] != ',')
Name++;
break;
case '?': case '!': case '*': break; }
Name++;
}
if (Info.earlyClobber() && Info.isReadWrite() && !Info.allowsRegister())
return false;
return Info.allowsMemory() || Info.allowsRegister();
}
bool TargetInfo::resolveSymbolicName(const char *&Name,
ArrayRef<ConstraintInfo> OutputConstraints,
unsigned &Index) const {
assert(*Name == '[' && "Symbolic name did not start with '['");
Name++;
const char *Start = Name;
while (*Name && *Name != ']')
Name++;
if (!*Name) {
return false;
}
std::string SymbolicName(Start, Name - Start);
for (Index = 0; Index != OutputConstraints.size(); ++Index)
if (SymbolicName == OutputConstraints[Index].getName())
return true;
return false;
}
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:
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;
if (i >= OutputConstraints.size()) return false;
if (OutputConstraints[i].isReadWrite())
return false;
if (Info.hasTiedOperand() && Info.getTiedOperand() != i)
return false;
Info.setTiedOperand(i, OutputConstraints[i]);
} else if (!validateAsmConstraint(Name, Info)) {
return false;
}
break;
case '[': {
unsigned Index = 0;
if (!resolveSymbolicName(Name, OutputConstraints, Index))
return false;
if (Info.hasTiedOperand() && Info.getTiedOperand() != Index)
return false;
if (OutputConstraints[Index].isReadWrite())
return false;
Info.setTiedOperand(Index, OutputConstraints[Index]);
break;
}
case '%': break;
case 'i': case 'n': break;
case 'I': case 'J':
case 'K':
case 'L':
case 'M':
case 'N':
case 'O':
case 'P':
if (!validateAsmConstraint(Name, Info))
return false;
break;
case 'r': Info.setAllowsRegister();
break;
case 'm': case 'o': case 'V': case '<': case '>': Info.setAllowsMemory();
break;
case 'g': case 'X': Info.setAllowsRegister();
Info.setAllowsMemory();
break;
case 'E': case 'F': case 'p': break;
case ',': break;
case '#': while (Name[1] && Name[1] != ',')
Name++;
break;
case '?': case '!': case '*': break; }
Name++;
}
return true;
}