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Add support for subsections to the ELF assembler. Fixes PR8717.

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Differential Revision: http://llvm-reviews.chandlerc.com/D598

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179725 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Peter Collingbourne
2013-04-17 21:18:16 +00:00
parent 53c9def433
commit df39be6cb4
30 changed files with 288 additions and 118 deletions
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23
include/llvm/MC/MCAssembler.h
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@@ -82,7 +82,7 @@ private:
/// @}
protected:
MCFragment(FragmentType _Kind, MCSectionData *_Parent);
MCFragment(FragmentType _Kind, MCSectionData *_Parent = 0);
public:
// Only for sentinel.
@@ -92,6 +92,7 @@ public:
FragmentType getKind() const { return Kind; }
MCSectionData *getParent() const { return Parent; }
void setParent(MCSectionData *Value) { Parent = Value; }
MCSymbolData *getAtom() const { return Atom; }
void setAtom(MCSymbolData *Value) { Atom = Value; }
@@ -132,7 +133,7 @@ class MCEncodedFragment : public MCFragment {
uint8_t BundlePadding;
public:
MCEncodedFragment(MCFragment::FragmentType FType, MCSectionData *SD)
MCEncodedFragment(MCFragment::FragmentType FType, MCSectionData *SD = 0)
: MCFragment(FType, SD), BundlePadding(0)
{
}
@@ -347,7 +348,7 @@ class MCAlignFragment : public MCFragment {
public:
MCAlignFragment(unsigned _Alignment, int64_t _Value, unsigned _ValueSize,
unsigned _MaxBytesToEmit, MCSectionData *SD)
unsigned _MaxBytesToEmit, MCSectionData *SD = 0)
: MCFragment(FT_Align, SD), Alignment(_Alignment),
Value(_Value),ValueSize(_ValueSize),
MaxBytesToEmit(_MaxBytesToEmit), EmitNops(false) {}
@@ -388,7 +389,7 @@ class MCFillFragment : public MCFragment {
public:
MCFillFragment(int64_t _Value, unsigned _ValueSize, uint64_t _Size,
MCSectionData *SD)
MCSectionData *SD = 0)
: MCFragment(FT_Fill, SD),
Value(_Value), ValueSize(_ValueSize), Size(_Size) {
assert((!ValueSize || (Size % ValueSize) == 0) &&
@@ -421,7 +422,7 @@ class MCOrgFragment : public MCFragment {
int8_t Value;
public:
MCOrgFragment(const MCExpr &_Offset, int8_t _Value, MCSectionData *SD)
MCOrgFragment(const MCExpr &_Offset, int8_t _Value, MCSectionData *SD = 0)
: MCFragment(FT_Org, SD),
Offset(&_Offset), Value(_Value) {}
@@ -450,7 +451,7 @@ class MCLEBFragment : public MCFragment {
SmallString<8> Contents;
public:
MCLEBFragment(const MCExpr &Value_, bool IsSigned_, MCSectionData *SD)
MCLEBFragment(const MCExpr &Value_, bool IsSigned_, MCSectionData *SD = 0)
: MCFragment(FT_LEB, SD),
Value(&Value_), IsSigned(IsSigned_) { Contents.push_back(0); }
@@ -486,7 +487,7 @@ class MCDwarfLineAddrFragment : public MCFragment {
public:
MCDwarfLineAddrFragment(int64_t _LineDelta, const MCExpr &_AddrDelta,
MCSectionData *SD)
MCSectionData *SD = 0)
: MCFragment(FT_Dwarf, SD),
LineDelta(_LineDelta), AddrDelta(&_AddrDelta) { Contents.push_back(0); }
@@ -517,7 +518,7 @@ class MCDwarfCallFrameFragment : public MCFragment {
SmallString<8> Contents;
public:
MCDwarfCallFrameFragment(const MCExpr &_AddrDelta, MCSectionData *SD)
MCDwarfCallFrameFragment(const MCExpr &_AddrDelta, MCSectionData *SD = 0)
: MCFragment(FT_DwarfFrame, SD),
AddrDelta(&_AddrDelta) { Contents.push_back(0); }
@@ -589,6 +590,10 @@ private:
/// it.
unsigned HasInstructions : 1;
/// Mapping from subsection number to insertion point for subsection numbers
/// below that number.
SmallVector<std::pair<unsigned, MCFragment *>, 1> SubsectionFragmentMap;
/// @}
public:
@@ -632,6 +637,8 @@ public:
bool empty() const { return Fragments.empty(); }
iterator getSubsectionInsertionPoint(unsigned Subsection);
bool isBundleLocked() const {
return BundleLockState != NotBundleLocked;
}