#include "llvm/Constants.h"
#include "llvm/Instruction.h"
#include "llvm/Support/Mangler.h"
+#include "llvm/Support/MathExtras.h"
#include "llvm/Target/TargetMachine.h"
using namespace llvm;
void AsmPrinter::setupMachineFunction(MachineFunction &MF) {
// What's my mangled name?
CurrentFnName = Mang->getValueName((Value*)MF.getFunction());
-
}
+// emitAlignment - Emit an alignment directive to the specified power of two.
+void AsmPrinter::emitAlignment(unsigned NumBits) const {
+ if (AlignmentIsInBytes) NumBits = 1 << NumBits;
+ O << AlignDirective << NumBits << "\n";
+}
+/// emitZeros - Emit a block of zeros.
+///
+void AsmPrinter::emitZeros(uint64_t NumZeros) const {
+ if (NumZeros) {
+ if (ZeroDirective)
+ O << ZeroDirective << NumZeros << "\n";
+ else {
+ for (; NumZeros; --NumZeros)
+ O << Data8bitsDirective << "0\n";
+ }
+ }
+}
// Print out the specified constant, without a storage class. Only the
// constants valid in constant expressions can occur here.
void AsmPrinter::emitConstantValueOnly(const Constant *CV) {
- if (CV->isNullValue())
+ if (CV->isNullValue() || isa<UndefValue>(CV))
O << "0";
else if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV)) {
assert(CB == ConstantBool::True);
if (((CI->getValue() << 32) >> 32) == CI->getValue())
O << CI->getValue();
else
- O << (unsigned long long)CI->getValue();
+ O << (uint64_t)CI->getValue();
else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
O << CI->getValue();
- else if (isa<GlobalValue>((Value*)CV))
- // This is a constant address for a global variable or function. Use the
- // name of the variable or function as the address value.
- O << Mang->getValueName(CV);
- else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
+ else if (isa<GlobalValue>((Value*)CV)) {
+ // This is a constant address for a global variable or function. Use the
+ // name of the variable or function as the address value, possibly
+ // decorating it with GlobalVarAddrPrefix/Suffix or
+ // FunctionAddrPrefix/Suffix (these all default to "" )
+ if (isa<Function>((Value*)CV))
+ O << FunctionAddrPrefix << Mang->getValueName(CV) << FunctionAddrSuffix;
+ else
+ O << GlobalVarAddrPrefix << Mang->getValueName(CV) << GlobalVarAddrSuffix;
+ } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
const TargetData &TD = TM.getTargetData();
switch(CE->getOpcode()) {
case Instruction::GetElementPtr: {
// generate a symbolic expression for the byte address
const Constant *ptrVal = CE->getOperand(0);
std::vector<Value*> idxVec(CE->op_begin()+1, CE->op_end());
- if (unsigned Offset = TD.getIndexedOffset(ptrVal->getType(), idxVec)) {
- O << "(";
+ if (int64_t Offset = TD.getIndexedOffset(ptrVal->getType(), idxVec)) {
+ if (Offset)
+ O << "(";
emitConstantValueOnly(ptrVal);
- O << ") + " << Offset;
+ if (Offset > 0)
+ O << ") + " << Offset;
+ else if (Offset < 0)
+ O << ") - " << -Offset;
} else {
emitConstantValueOnly(ptrVal);
}
O << "\"";
for (unsigned i = 0; i != CVA->getNumOperands(); ++i) {
- unsigned char C = cast<ConstantInt>(CVA->getOperand(i))->getRawValue();
+ unsigned char C =
+ (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getRawValue();
if (C == '"') {
O << "\\\"";
/// emitGlobalConstant - Print a general LLVM constant to the .s file.
///
-void AsmPrinter::emitGlobalConstant(const Constant *CV) {
+void AsmPrinter::emitGlobalConstant(const Constant *CV) {
const TargetData &TD = TM.getTargetData();
- if (CV->isNullValue()) {
- O << ZeroDirective << TD.getTypeSize(CV->getType()) << "\n";
+ if (CV->isNullValue() || isa<UndefValue>(CV)) {
+ emitZeros(TD.getTypeSize(CV->getType()));
return;
} else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
if (CVA->isString()) {
} else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
// Print the fields in successive locations. Pad to align if needed!
const StructLayout *cvsLayout = TD.getStructLayout(CVS->getType());
- unsigned sizeSoFar = 0;
+ uint64_t sizeSoFar = 0;
for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
const Constant* field = CVS->getOperand(i);
// Check if padding is needed and insert one or more 0s.
- unsigned fieldSize = TD.getTypeSize(field->getType());
- unsigned padSize = ((i == e-1? cvsLayout->StructSize
+ uint64_t fieldSize = TD.getTypeSize(field->getType());
+ uint64_t padSize = ((i == e-1? cvsLayout->StructSize
: cvsLayout->MemberOffsets[i+1])
- cvsLayout->MemberOffsets[i]) - fieldSize;
sizeSoFar += fieldSize + padSize;
emitGlobalConstant(field);
// Insert the field padding unless it's zero bytes...
- if (padSize)
- O << ZeroDirective << padSize << "\n";
+ emitZeros(padSize);
}
assert(sizeSoFar == cvsLayout->StructSize &&
"Layout of constant struct may be incorrect!");
// precision...
double Val = CFP->getValue();
if (CFP->getType() == Type::DoubleTy) {
- union DU { // Abide by C TBAA rules
- double FVal;
- uint64_t UVal;
- } U;
- U.FVal = Val;
-
- if (TD.isBigEndian()) {
- O << Data32bitsDirective << unsigned(U.UVal >> 32)
- << "\t; double most significant word " << Val << "\n";
- O << Data32bitsDirective << unsigned(U.UVal)
- << "\t; double least significant word " << Val << "\n";
+ if (Data64bitsDirective)
+ O << Data64bitsDirective << DoubleToBits(Val) << "\t" << CommentString
+ << " double value: " << Val << "\n";
+ else if (TD.isBigEndian()) {
+ O << Data32bitsDirective << unsigned(DoubleToBits(Val) >> 32)
+ << "\t" << CommentString << " double most significant word "
+ << Val << "\n";
+ O << Data32bitsDirective << unsigned(DoubleToBits(Val))
+ << "\t" << CommentString << " double least significant word "
+ << Val << "\n";
} else {
- O << Data32bitsDirective << unsigned(U.UVal)
- << "\t; double least significant word " << Val << "\n";
- O << Data32bitsDirective << unsigned(U.UVal >> 32)
- << "\t; double most significant word " << Val << "\n";
+ O << Data32bitsDirective << unsigned(DoubleToBits(Val))
+ << "\t" << CommentString << " double least significant word " << Val
+ << "\n";
+ O << Data32bitsDirective << unsigned(DoubleToBits(Val) >> 32)
+ << "\t" << CommentString << " double most significant word " << Val
+ << "\n";
}
return;
} else {
- union FU { // Abide by C TBAA rules
- float FVal;
- int32_t UVal;
- } U;
- U.FVal = Val;
-
- O << Data32bitsDirective << U.UVal << "\t; float " << Val << "\n";
+ O << Data32bitsDirective << FloatToBits(Val) << "\t" << CommentString
+ << " float " << Val << "\n";
return;
}
} else if (CV->getType() == Type::ULongTy || CV->getType() == Type::LongTy) {
if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
uint64_t Val = CI->getRawValue();
-
- if (TD.isBigEndian()) {
+
+ if (Data64bitsDirective)
+ O << Data64bitsDirective << Val << "\n";
+ else if (TD.isBigEndian()) {
O << Data32bitsDirective << unsigned(Val >> 32)
- << "\t; Double-word most significant word " << Val << "\n";
+ << "\t" << CommentString << " Double-word most significant word "
+ << Val << "\n";
O << Data32bitsDirective << unsigned(Val)
- << "\t; Double-word least significant word " << Val << "\n";
+ << "\t" << CommentString << " Double-word least significant word "
+ << Val << "\n";
} else {
O << Data32bitsDirective << unsigned(Val)
- << "\t; Double-word least significant word " << Val << "\n";
+ << "\t" << CommentString << " Double-word least significant word "
+ << Val << "\n";
O << Data32bitsDirective << unsigned(Val >> 32)
- << "\t; Double-word most significant word " << Val << "\n";
+ << "\t" << CommentString << " Double-word most significant word "
+ << Val << "\n";
}
return;
}
}
const Type *type = CV->getType();
- O << "\t";
switch (type->getTypeID()) {
+ case Type::BoolTyID:
case Type::UByteTyID: case Type::SByteTyID:
O << Data8bitsDirective;
break;
case Type::UShortTyID: case Type::ShortTyID:
O << Data16bitsDirective;
break;
- case Type::BoolTyID:
case Type::PointerTyID:
+ if (TD.getPointerSize() == 8) {
+ O << Data64bitsDirective;
+ break;
+ }
+ //Fall through for pointer size == int size
case Type::UIntTyID: case Type::IntTyID:
O << Data32bitsDirective;
break;
- case Type::ULongTyID: case Type::LongTyID:
- assert (0 && "Should have already output double-word constant.");
+ case Type::ULongTyID: case Type::LongTyID:
+ assert(Data64bitsDirective &&"Target cannot handle 64-bit constant exprs!");
+ O << Data64bitsDirective;
+ break;
case Type::FloatTyID: case Type::DoubleTyID:
assert (0 && "Should have already output floating point constant.");
default:
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