Add structures used for collecting eh information.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34473 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey 2007-02-21 22:38:31 +00:00
parent f09f2e304d
commit 59667fe203
2 changed files with 172 additions and 0 deletions

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@ -44,6 +44,7 @@ namespace llvm {
class Constant;
class DebugInfoDesc;
class GlobalVariable;
class MachineBasicBlock;
class MachineFunction;
class MachineMove;
class Module;
@ -948,6 +949,27 @@ public:
void AddVariable(DebugVariable *V) { Variables.push_back(V); }
};
//===----------------------------------------------------------------------===//
/// LandingPadInfo - This structure is used to retain landing pad info for
/// the current function.
///
struct LandingPadInfo {
MachineBasicBlock *LandingPadBlock; // Landing pad block.
unsigned BeginLabel; // Label prior to invoke.
unsigned EndLabel; // Label after invoke.
unsigned LandingPadLabel; // Label at beginning of landing pad.
Function *Personality; // Personality function.
std::vector<unsigned> TypeIds; // List of type ids.
LandingPadInfo(MachineBasicBlock *MBB)
: LandingPadBlock(MBB)
, BeginLabel(0)
, EndLabel(0)
, LandingPadLabel(0)
, TypeIds()
{}
};
//===----------------------------------------------------------------------===//
/// MachineModuleInfo - This class contains meta information specific to a
/// module. Queries can be made by different debugging and exception handling
@ -988,6 +1010,14 @@ private:
// frame maps by debug and exception handling consumers.
std::vector<MachineMove> FrameMoves;
// LandingPads - List of LandingPadInfo describing the landing pad information
// in the current function.
std::vector<LandingPadInfo> LandingPads;
// TypeInfos - List of C++ TypeInfo used in the currect function.
//
std::vector<GlobalVariable *> TypeInfos;
public:
MachineModuleInfo();
~MachineModuleInfo();
@ -1148,6 +1178,54 @@ public:
/// handling comsumers.
std::vector<MachineMove> &getFrameMoves() { return FrameMoves; }
//===-EH-----------------------------------------------------------------===//
/// getOrCreateLandingPadInfo - Find or create an LandingPadInfo for the
/// specified MachineBasicBlock.
LandingPadInfo &getOrCreateLandingPadInfo(MachineBasicBlock *LandingPad);
/// addInvoke - Provide the begin and end labels of an invoke style call and
/// associate it with a try landing pad block.
void addInvoke(MachineBasicBlock *LandingPad, unsigned BeginLabel,
unsigned EndLabel);
/// addLandingPad - Add a new panding pad. Returns the label ID for the
/// landing pad entry.
unsigned addLandingPad(MachineBasicBlock *LandingPad);
/// addPersonality - Provide the personality function for the exception
/// information.
void addPersonality(MachineBasicBlock *LandingPad, Function *Personality);
/// addCatchTypeInfo - Provide the catch typeinfo for a landing pad.
///
void addCatchTypeInfo(MachineBasicBlock *LandingPad,
std::vector<GlobalVariable *> &TyInfo);
/// getTypeIDFor - Return the type id for the specified typeinfo. This is
/// function wide.
unsigned getTypeIDFor(GlobalVariable *TI);
/// TidyLandingPads - Remap landing pad labels and remove any deleted landing
/// pads.
void TidyLandingPads();
/// getLandingPadInfos - Return a reference to the landing pad info for the
/// current function.
const std::vector<LandingPadInfo> &getLandingPads() const {
return LandingPads;
}
/// getTypeInfos - Return a reference to the C++ typeinfo for the current
/// function.
const std::vector<GlobalVariable *> &getTypeInfos() const {
return TypeInfos;
}
/// getPersonality - Return a personality function if available. The presence
/// of one is required to emit exception handling info.
Function *getPersonality() const;
}; // End class MachineModuleInfo
} // End llvm namespace

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@ -1472,6 +1472,7 @@ MachineModuleInfo::MachineModuleInfo()
, ScopeMap()
, RootScope(NULL)
, FrameMoves()
, LandingPads()
{}
MachineModuleInfo::~MachineModuleInfo() {
@ -1510,6 +1511,10 @@ void MachineModuleInfo::EndFunction() {
// Clean up frame info.
FrameMoves.clear();
// Clean up exception info.
LandingPads.clear();
TypeInfos.clear();
}
/// getDescFor - Convert a Value to a debug information descriptor.
@ -1640,6 +1645,95 @@ DebugScope *MachineModuleInfo::getOrCreateScope(DebugInfoDesc *ScopeDesc) {
return Slot;
}
//===-EH-------------------------------------------------------------------===//
/// getOrCreateLandingPadInfo - Find or create an LandingPadInfo for the
/// specified MachineBasicBlock.
LandingPadInfo &MachineModuleInfo::getOrCreateLandingPadInfo
(MachineBasicBlock *LandingPad) {
unsigned N = LandingPads.size();
for (unsigned i = 0; i < N; ++i) {
LandingPadInfo &UI = LandingPads[i];
if (UI.LandingPadBlock == LandingPad)
return UI;
}
LandingPads.push_back(LandingPadInfo(LandingPad));
return LandingPads[N];
}
/// addInvoke - Provide the begin and end labels of an invoke style call and
/// associate it with a try landing pad block.
void MachineModuleInfo::addInvoke(MachineBasicBlock *LandingPad,
unsigned BeginLabel, unsigned EndLabel) {
LandingPadInfo &UI = getOrCreateLandingPadInfo(LandingPad);
if (!UI.BeginLabel) UI.BeginLabel = BeginLabel;
UI.EndLabel = EndLabel;
}
/// addLandingPad - Provide the label of a try LandingPad block.
///
unsigned MachineModuleInfo::addLandingPad(MachineBasicBlock *LandingPad) {
unsigned LandingPadLabel = NextLabelID();
LandingPadInfo &UI = getOrCreateLandingPadInfo(LandingPad);
UI.LandingPadLabel = LandingPadLabel;
return LandingPadLabel;
}
/// addPersonality - Provide the personality function for the exception
/// information.
void MachineModuleInfo::addPersonality(MachineBasicBlock *LandingPad,
Function *Personality) {
LandingPadInfo &UI = getOrCreateLandingPadInfo(LandingPad);
UI.Personality = Personality;
}
/// addCatchTypeInfo - Provide the catch typeinfo for a landing pad.
///
void MachineModuleInfo::addCatchTypeInfo(MachineBasicBlock *LandingPad,
std::vector<GlobalVariable *> &TyInfo) {
LandingPadInfo &UI = getOrCreateLandingPadInfo(LandingPad);
for (unsigned N = TyInfo.size(); N; --N)
UI.TypeIds.push_back(getTypeIDFor(TyInfo[N - 1]));
}
/// TidyLandingPads - Remap landing pad labels and remove any deleted landing
/// pads.
void MachineModuleInfo::TidyLandingPads() {
for (unsigned i = 0; i != LandingPads.size(); ) {
LandingPadInfo &LandingPad = LandingPads[i];
LandingPad.BeginLabel = MappedLabel(LandingPad.BeginLabel);
LandingPad.EndLabel = MappedLabel(LandingPad.EndLabel);
LandingPad.LandingPadLabel = MappedLabel(LandingPad.LandingPadLabel);
if (!LandingPad.BeginLabel ||
!LandingPad.EndLabel ||
!LandingPad.LandingPadLabel) {
LandingPads.erase(LandingPads.begin() + i);
continue;
}
++i;
}
}
/// getTypeIDFor - Return the type id for the specified typeinfo. This is
/// function wide.
unsigned MachineModuleInfo::getTypeIDFor(GlobalVariable *TI) {
for (unsigned i = 0, N = TypeInfos.size(); i != N; ++i)
if (TypeInfos[i] == TI) return i + 1;
TypeInfos.push_back(TI);
return TypeInfos.size();
}
/// getLandingPadInfos - Return a reference to the landing pad info for the
/// current function.
Function *MachineModuleInfo::getPersonality() const {
return !LandingPads.empty() ? LandingPads[0].Personality : NULL;
}
//===----------------------------------------------------------------------===//
/// DebugLabelFolding pass - This pass prunes out redundant labels. This allows
/// a info consumer to determine if the range of two labels is empty, by seeing