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objective-C blocks: bring back the CharUnit patch for 

captured block variable layout meta-data. No intended change
in functionality.

llvm-svn: 167549
This commit is contained in:
Fariborz Jahanian 2012-11-07 20:00:32 +00:00
parent 28e02ec8c1
commit 7778d616e8
1 changed files with 46 additions and 45 deletions
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91
clang/lib/CodeGen/CGObjCMac.cpp
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@ -810,10 +810,11 @@ public:
class RUN_SKIP {
public:
enum BLOCK_LAYOUT_OPCODE opcode;
unsigned block_var_bytepos;
unsigned block_var_size;
CharUnits block_var_bytepos;
CharUnits block_var_size;
RUN_SKIP(enum BLOCK_LAYOUT_OPCODE Opcode = BLOCK_LAYOUT_OPERATOR,
unsigned BytePos = 0, unsigned Size = 0)
CharUnits BytePos = CharUnits::Zero(),
CharUnits Size = CharUnits::Zero())
: opcode(Opcode), block_var_bytepos(BytePos), block_var_size(Size) {}
// Allow sorting based on byte pos.
@ -946,16 +947,16 @@ protected:
void UpdateRunSkipBlockVars(bool IsByref,
Qualifiers::ObjCLifetime LifeTime,
unsigned FieldOffset,
unsigned FieldSize);
CharUnits FieldOffset,
CharUnits FieldSize);
void BuildRCBlockVarRecordLayout(const RecordType *RT,
unsigned int BytePos, bool &HasUnion);
CharUnits BytePos, bool &HasUnion);
void BuildRCRecordLayout(const llvm::StructLayout *RecLayout,
const RecordDecl *RD,
ArrayRef<const FieldDecl*> RecFields,
unsigned int BytePos, bool &HasUnion);
CharUnits BytePos, bool &HasUnion);
uint64_t InlineLayoutInstruction(SmallVectorImpl<unsigned char> &Layout);
@ -1980,40 +1981,37 @@ Qualifiers::ObjCLifetime CGObjCCommonMac::getBlockCaptureLifetime(QualType FQT)
void CGObjCCommonMac::UpdateRunSkipBlockVars(bool IsByref,
Qualifiers::ObjCLifetime LifeTime,
unsigned FieldOffset,
unsigned FieldSize) {
unsigned ByteSizeInBits = CGM.getContext().getTargetInfo().getCharWidth();
unsigned FieldSizeInBytes = FieldSize/ByteSizeInBits;
CharUnits FieldOffset,
CharUnits FieldSize) {
// __block variables are passed by their descriptor address.
if (IsByref)
RunSkipBlockVars.push_back(RUN_SKIP(BLOCK_LAYOUT_BYREF, FieldOffset,
FieldSizeInBytes));
FieldSize));
else if (LifeTime == Qualifiers::OCL_Strong)
RunSkipBlockVars.push_back(RUN_SKIP(BLOCK_LAYOUT_STRONG, FieldOffset,
FieldSizeInBytes));
FieldSize));
else if (LifeTime == Qualifiers::OCL_Weak)
RunSkipBlockVars.push_back(RUN_SKIP(BLOCK_LAYOUT_WEAK, FieldOffset,
FieldSizeInBytes));
FieldSize));
else if (LifeTime == Qualifiers::OCL_ExplicitNone)
RunSkipBlockVars.push_back(RUN_SKIP(BLOCK_LAYOUT_UNRETAINED, FieldOffset,
FieldSizeInBytes));
FieldSize));
else
RunSkipBlockVars.push_back(RUN_SKIP(BLOCK_LAYOUT_NON_OBJECT_BYTES,
FieldOffset,
FieldSizeInBytes));
FieldSize));
}
void CGObjCCommonMac::BuildRCRecordLayout(const llvm::StructLayout *RecLayout,
const RecordDecl *RD,
ArrayRef<const FieldDecl*> RecFields,
unsigned int BytePos, bool &HasUnion) {
CharUnits BytePos, bool &HasUnion) {
bool IsUnion = (RD && RD->isUnion());
uint64_t MaxUnionSize = 0;
CharUnits MaxUnionSize = CharUnits::Zero();
const FieldDecl *MaxField = 0;
const FieldDecl *LastFieldBitfieldOrUnnamed = 0;
uint64_t MaxFieldOffset = 0;
uint64_t LastBitfieldOrUnnamedOffset = 0;
CharUnits MaxFieldOffset = CharUnits::Zero();
CharUnits LastBitfieldOrUnnamedOffset = CharUnits::Zero();
if (RecFields.empty())
return;
@ -2021,11 +2019,11 @@ void CGObjCCommonMac::BuildRCRecordLayout(const llvm::StructLayout *RecLayout,
for (unsigned i = 0, e = RecFields.size(); i != e; ++i) {
const FieldDecl *Field = RecFields[i];
uint64_t FieldOffset;
// Note that 'i' here is actually the field index inside RD of Field,
// although this dependency is hidden.
const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
FieldOffset = (RL.getFieldOffset(i) / ByteSizeInBits);
CharUnits FieldOffset =
CGM.getContext().toCharUnitsFromBits(RL.getFieldOffset(i));
// Skip over unnamed or bitfields
if (!Field->getIdentifier() || Field->isBitField()) {
@ -2070,7 +2068,7 @@ void CGObjCCommonMac::BuildRCRecordLayout(const llvm::StructLayout *RecLayout,
// one element is already done.
uint64_t ElIx = 1;
for (int FirstIndex = RunSkipBlockVars.size() - 1 ;ElIx < ElCount; ElIx++) {
uint64_t Size = CGM.getContext().getTypeSize(RT)/ByteSizeInBits;
CharUnits Size = CGM.getContext().getTypeSizeInChars(RT);
for (int i = OldIndex+1; i <= FirstIndex; ++i)
RunSkipBlockVars.push_back(
RUN_SKIP(RunSkipBlockVars[i].opcode,
@ -2080,9 +2078,9 @@ void CGObjCCommonMac::BuildRCRecordLayout(const llvm::StructLayout *RecLayout,
continue;
}
}
unsigned FieldSize = CGM.getContext().getTypeSize(Field->getType());
CharUnits FieldSize = CGM.getContext().getTypeSizeInChars(Field->getType());
if (IsUnion) {
uint64_t UnionIvarSize = FieldSize;
CharUnits UnionIvarSize = FieldSize;
if (UnionIvarSize > MaxUnionSize) {
MaxUnionSize = UnionIvarSize;
MaxField = Field;
@ -2101,18 +2099,19 @@ void CGObjCCommonMac::BuildRCRecordLayout(const llvm::StructLayout *RecLayout,
// Last field was a bitfield. Must update the info.
uint64_t BitFieldSize
= LastFieldBitfieldOrUnnamed->getBitWidthValue(CGM.getContext());
unsigned Size = (BitFieldSize / ByteSizeInBits) +
unsigned UnsSize = (BitFieldSize / ByteSizeInBits) +
((BitFieldSize % ByteSizeInBits) != 0);
CharUnits Size = CharUnits::fromQuantity(UnsSize);
Size += LastBitfieldOrUnnamedOffset;
UpdateRunSkipBlockVars(false,
getBlockCaptureLifetime(LastFieldBitfieldOrUnnamed->getType()),
BytePos + LastBitfieldOrUnnamedOffset,
Size*ByteSizeInBits);
Size);
} else {
assert(!LastFieldBitfieldOrUnnamed->getIdentifier() &&"Expected unnamed");
// Last field was unnamed. Must update skip info.
unsigned FieldSize
= CGM.getContext().getTypeSize(LastFieldBitfieldOrUnnamed->getType());
CharUnits FieldSize
= CGM.getContext().getTypeSizeInChars(LastFieldBitfieldOrUnnamed->getType());
UpdateRunSkipBlockVars(false,
getBlockCaptureLifetime(LastFieldBitfieldOrUnnamed->getType()),
BytePos + LastBitfieldOrUnnamedOffset,
@ -2128,7 +2127,7 @@ void CGObjCCommonMac::BuildRCRecordLayout(const llvm::StructLayout *RecLayout,
}
void CGObjCCommonMac::BuildRCBlockVarRecordLayout(const RecordType *RT,
unsigned int BytePos,
CharUnits BytePos,
bool &HasUnion) {
const RecordDecl *RD = RT->getDecl();
SmallVector<const FieldDecl*, 16> Fields;
@ -2281,15 +2280,19 @@ llvm::Constant *CGObjCCommonMac::BuildRCBlockLayout(CodeGenModule &CGM,
// Ignore constant captures.
if (capture.isConstant()) continue;
uint64_t fieldOffset = layout->getElementOffset(capture.getIndex());
CharUnits fieldOffset =
CharUnits::fromQuantity(layout->getElementOffset(capture.getIndex()));
assert(!type->isArrayType() && "array variable should not be caught");
if (const RecordType *record = type->getAs<RecordType>()) {
BuildRCBlockVarRecordLayout(record, fieldOffset, hasUnion);
continue;
}
unsigned fieldSize = ci->isByRef() ? WordSizeInBits
: CGM.getContext().getTypeSize(type);
CharUnits fieldSize;
if (ci->isByRef())
fieldSize = CharUnits::fromQuantity(WordSizeInBytes);
else
fieldSize = CGM.getContext().getTypeSizeInChars(type);
UpdateRunSkipBlockVars(ci->isByRef(), getBlockCaptureLifetime(type),
fieldOffset, fieldSize);
}
@ -2303,12 +2306,10 @@ llvm::Constant *CGObjCCommonMac::BuildRCBlockLayout(CodeGenModule &CGM,
SmallVector<unsigned char, 16> Layout;
unsigned size = RunSkipBlockVars.size();
unsigned int shift = (WordSizeInBytes == 8) ? 3 : 2;
unsigned int mask = (WordSizeInBytes == 8) ? 0x7 : 0x3;
for (unsigned i = 0; i < size; i++) {
enum BLOCK_LAYOUT_OPCODE opcode = RunSkipBlockVars[i].opcode;
unsigned start_byte_pos = RunSkipBlockVars[i].block_var_bytepos;
unsigned end_byte_pos = start_byte_pos;
CharUnits start_byte_pos = RunSkipBlockVars[i].block_var_bytepos;
CharUnits end_byte_pos = start_byte_pos;
unsigned j = i+1;
while (j < size) {
if (opcode == RunSkipBlockVars[j].opcode) {
@ -2318,22 +2319,22 @@ llvm::Constant *CGObjCCommonMac::BuildRCBlockLayout(CodeGenModule &CGM,
else
break;
}
unsigned size_in_bytes =
CharUnits size_in_bytes =
end_byte_pos - start_byte_pos + RunSkipBlockVars[j-1].block_var_size;
if (j < size) {
unsigned gap =
CharUnits gap =
RunSkipBlockVars[j].block_var_bytepos -
RunSkipBlockVars[j-1].block_var_bytepos - RunSkipBlockVars[j-1].block_var_size;
size_in_bytes += gap;
}
unsigned residue_in_bytes = 0;
CharUnits residue_in_bytes = CharUnits::Zero();
if (opcode == BLOCK_LAYOUT_NON_OBJECT_BYTES) {
residue_in_bytes = size_in_bytes & mask;
residue_in_bytes = size_in_bytes % WordSizeInBytes;
size_in_bytes -= residue_in_bytes;
opcode = BLOCK_LAYOUT_NON_OBJECT_WORDS;
}
unsigned size_in_words = size_in_bytes >> shift;
unsigned size_in_words = size_in_bytes.getQuantity() / WordSizeInBytes;
while (size_in_words >= 16) {
// Note that value in imm. is one less that the actual
// value. So, 0xf means 16 words follow!
@ -2347,9 +2348,9 @@ llvm::Constant *CGObjCCommonMac::BuildRCBlockLayout(CodeGenModule &CGM,
unsigned char inst = (opcode << 4) | (size_in_words-1);
Layout.push_back(inst);
}
if (residue_in_bytes > 0) {
if (residue_in_bytes > CharUnits::Zero()) {
unsigned char inst =
(BLOCK_LAYOUT_NON_OBJECT_BYTES << 4) | (residue_in_bytes-1);
(BLOCK_LAYOUT_NON_OBJECT_BYTES << 4) | (residue_in_bytes.getQuantity()-1);
Layout.push_back(inst);
}
}