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reapply the patches reverted in r149470 that reenable ConstantDataArray,

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but with a critical fix to the SelectionDAG code that optimizes copies
from strings into immediate stores: the previous code was stopping reading
string data at the first nul.  Address this by adding a new argument to
llvm::getConstantStringInfo, preserving the behavior before the patch.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149800 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2012-02-05 02:29:43 +00:00
parent eea723fe02
commit 18c7f80b3e
19 changed files with 276 additions and 539 deletions
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33
lib/CodeGen/AsmPrinter/AsmPrinter.cpp
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@@ -1684,31 +1684,18 @@ static void EmitGlobalConstantDataSequential(const ConstantDataSequential *CDS,
static void EmitGlobalConstantArray(const ConstantArray *CA, unsigned AddrSpace,
AsmPrinter &AP) {
if (AddrSpace != 0 || !CA->isString()) {
// Not a string. Print the values in successive locations.
// See if we can aggregate some values. Make sure it can be
// represented as a series of bytes of the constant value.
int Value = isRepeatedByteSequence(CA, AP.TM);
// See if we can aggregate some values. Make sure it can be
// represented as a series of bytes of the constant value.
int Value = isRepeatedByteSequence(CA, AP.TM);
if (Value != -1) {
uint64_t Bytes = AP.TM.getTargetData()->getTypeAllocSize(CA->getType());
AP.OutStreamer.EmitFill(Bytes, Value, AddrSpace);
}
else {
for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i)
EmitGlobalConstantImpl(CA->getOperand(i), AddrSpace, AP);
}
return;
if (Value != -1) {
uint64_t Bytes = AP.TM.getTargetData()->getTypeAllocSize(CA->getType());
AP.OutStreamer.EmitFill(Bytes, Value, AddrSpace);
}
else {
for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i)
EmitGlobalConstantImpl(CA->getOperand(i), AddrSpace, AP);
}
// Otherwise, it can be emitted as .ascii.
SmallVector<char, 128> TmpVec;
TmpVec.reserve(CA->getNumOperands());
for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i)
TmpVec.push_back(cast<ConstantInt>(CA->getOperand(i))->getZExtValue());
AP.OutStreamer.EmitBytes(StringRef(TmpVec.data(), TmpVec.size()), AddrSpace);
}
static void EmitGlobalConstantVector(const ConstantVector *CV,