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C++, CBE, and TLOF support for ConstantDataSequential

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148805 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2012-01-24 14:17:05 +00:00
parent 3210060243
commit 29cc6cb4d1
4 changed files with 125 additions and 20 deletions
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80
lib/Target/CBackend/CBackend.cpp
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@ -215,6 +215,8 @@ namespace {
bool printConstExprCast(const ConstantExpr *CE, bool Static);
void printConstantArray(ConstantArray *CPA, bool Static);
void printConstantVector(ConstantVector *CV, bool Static);
void printConstantDataSequential(ConstantDataSequential *CDS, bool Static);
/// isAddressExposed - Return true if the specified value's name needs to
/// have its address taken in order to get a C value of the correct type.
@ -556,20 +558,10 @@ raw_ostream &CWriter::printType(raw_ostream &Out, Type *Ty,
}
void CWriter::printConstantArray(ConstantArray *CPA, bool Static) {
// As a special case, print the array as a string if it is an array of
// ubytes or an array of sbytes with positive values.
//
Type *ETy = CPA->getType()->getElementType();
bool isString = (ETy == Type::getInt8Ty(CPA->getContext()) ||
ETy == Type::getInt8Ty(CPA->getContext()));
// Make sure the last character is a null char, as automatically added by C
if (isString && (CPA->getNumOperands() == 0 ||
!cast<Constant>(*(CPA->op_end()-1))->isNullValue()))
isString = false;
if (isString) {
if (CPA->isCString()) {
Out << '\"';
// Keep track of whether the last number was a hexadecimal escape.
bool LastWasHex = false;
@ -637,6 +629,66 @@ void CWriter::printConstantVector(ConstantVector *CP, bool Static) {
Out << " }";
}
void CWriter::printConstantDataSequential(ConstantDataSequential *CDS,
bool Static) {
// As a special case, print the array as a string if it is an array of
// ubytes or an array of sbytes with positive values.
//
if (CDS->isCString()) {
Out << '\"';
// Keep track of whether the last number was a hexadecimal escape.
bool LastWasHex = false;
StringRef Bytes = CDS->getAsCString();
// Do not include the last character, which we know is null
for (unsigned i = 0, e = Bytes.size(); i != e; ++i) {
unsigned char C = Bytes[i];
// Print it out literally if it is a printable character. The only thing
// to be careful about is when the last letter output was a hex escape
// code, in which case we have to be careful not to print out hex digits
// explicitly (the C compiler thinks it is a continuation of the previous
// character, sheesh...)
//
if (isprint(C) && (!LastWasHex || !isxdigit(C))) {
LastWasHex = false;
if (C == '"' || C == '\\')
Out << "\\" << (char)C;
else
Out << (char)C;
} else {
LastWasHex = false;
switch (C) {
case '\n': Out << "\\n"; break;
case '\t': Out << "\\t"; break;
case '\r': Out << "\\r"; break;
case '\v': Out << "\\v"; break;
case '\a': Out << "\\a"; break;
case '\"': Out << "\\\""; break;
case '\'': Out << "\\\'"; break;
default:
Out << "\\x";
Out << (char)(( C/16 < 10) ? ( C/16 +'0') : ( C/16 -10+'A'));
Out << (char)(((C&15) < 10) ? ((C&15)+'0') : ((C&15)-10+'A'));
LastWasHex = true;
break;
}
}
}
Out << '\"';
} else {
Out << "{ ";
printConstant(CDS->getElementAsConstant(0), Static);
for (unsigned i = 1, e = CDS->getNumOperands(); i != e; ++i) {
Out << ", ";
printConstant(CDS->getElementAsConstant(i), Static);
}
Out << " }";
}
}
// isFPCSafeToPrint - Returns true if we may assume that CFP may be written out
// textually as a double (rather than as a reference to a stack-allocated
// variable). We decide this by converting CFP to a string and back into a
@ -1024,6 +1076,9 @@ void CWriter::printConstant(Constant *CPV, bool Static) {
Out << "{ "; // Arrays are wrapped in struct types.
if (ConstantArray *CA = dyn_cast<ConstantArray>(CPV)) {
printConstantArray(CA, Static);
} else if (ConstantDataSequential *CDS =
dyn_cast<ConstantDataSequential>(CPV)) {
printConstantDataSequential(CDS, Static);
} else {
assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
ArrayType *AT = cast<ArrayType>(CPV->getType());
@ -1051,6 +1106,9 @@ void CWriter::printConstant(Constant *CPV, bool Static) {
}
if (ConstantVector *CV = dyn_cast<ConstantVector>(CPV)) {
printConstantVector(CV, Static);
} else if (ConstantDataSequential *CDS =
dyn_cast<ConstantDataSequential>(CPV)) {
printConstantDataSequential(CDS, Static);
} else {
assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
VectorType *VT = cast<VectorType>(CPV->getType());