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Add support for targets without a .zero directive

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15894 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-08-17 21:38:40 +00:00
parent 5069438763
commit 7d057a3fd5
1 changed files with 23 additions and 4 deletions
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27
lib/CodeGen/AsmPrinter.cpp
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@ -39,6 +39,25 @@ void AsmPrinter::emitAlignment(unsigned NumBits) const {
O << AlignDirective << NumBits << "\n"; O << AlignDirective << NumBits << "\n";
} }
/// emitZeros - Emit a block of zeros.
///
void AsmPrinter::emitZeros(unsigned NumZeros) const {
if (NumZeros) {
if (ZeroDirective)
O << ZeroDirective << NumZeros << "\n";
else {
if (NumZeros >= 8 && Data64bitsDirective) {
for (; NumZeros >= 8; NumZeros -= 8)
O << Data64bitsDirective << "0\n";
}
for (; NumZeros >= 4; NumZeros -= 4)
O << Data32bitsDirective << "0\n";
for (; NumZeros; --NumZeros)
O << Data8bitsDirective << "0\n";
}
}
}
// Print out the specified constant, without a storage class. Only the // Print out the specified constant, without a storage class. Only the
// constants valid in constant expressions can occur here. // constants valid in constant expressions can occur here.
void AsmPrinter::emitConstantValueOnly(const Constant *CV) { void AsmPrinter::emitConstantValueOnly(const Constant *CV) {
@ -159,7 +178,7 @@ void AsmPrinter::emitGlobalConstant(const Constant *CV) {
const TargetData &TD = TM.getTargetData(); const TargetData &TD = TM.getTargetData();
if (CV->isNullValue()) { if (CV->isNullValue()) {
O << ZeroDirective << TD.getTypeSize(CV->getType()) << "\n"; emitZeros(TD.getTypeSize(CV->getType()));
return; return;
} else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) { } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
if (CVA->isString()) { if (CVA->isString()) {
@ -189,8 +208,7 @@ void AsmPrinter::emitGlobalConstant(const Constant *CV) {
emitGlobalConstant(field); emitGlobalConstant(field);
// Insert the field padding unless it's zero bytes... // Insert the field padding unless it's zero bytes...
if (padSize) emitZeros(padSize);
O << ZeroDirective << padSize << "\n";
} }
assert(sizeSoFar == cvsLayout->StructSize && assert(sizeSoFar == cvsLayout->StructSize &&
"Layout of constant struct may be incorrect!"); "Layout of constant struct may be incorrect!");
@ -207,7 +225,8 @@ void AsmPrinter::emitGlobalConstant(const Constant *CV) {
U.FVal = Val; U.FVal = Val;
if (Data64bitsDirective) if (Data64bitsDirective)
O << Data64bitsDirective << U.UVal << "\n"; O << Data64bitsDirective << U.UVal << "\t" << CommentChar
<< " double value: " << Val << "\n";
else if (TD.isBigEndian()) { else if (TD.isBigEndian()) {
O << Data32bitsDirective << unsigned(U.UVal >> 32) O << Data32bitsDirective << unsigned(U.UVal >> 32)
<< "\t" << CommentChar << " double most significant word " << "\t" << CommentChar << " double most significant word "