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Make MachineFunction not crash when TargetMachine::getRegisterInfo() returns 

NULL, but just hide some debug output then.

llvm-svn: 57437
This commit is contained in:
Matthijs Kooijman 2008-10-13 12:37:16 +00:00
parent 35e1387ac6
commit c8d7988da8
1 changed files with 9 additions and 5 deletions
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14
llvm/lib/CodeGen/MachineFunction.cpp
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@ -110,8 +110,11 @@ void ilist_traits<MachineBasicBlock>::deleteNode(MachineBasicBlock *MBB) {
MachineFunction::MachineFunction(const Function *F,
const TargetMachine &TM)
: Annotation(MF_AID), Fn(F), Target(TM) {
RegInfo = new (Allocator.Allocate<MachineRegisterInfo>())
MachineRegisterInfo(*TM.getRegisterInfo());
if (TM.getRegisterInfo())
RegInfo = new (Allocator.Allocate<MachineRegisterInfo>())
MachineRegisterInfo(*TM.getRegisterInfo());
else
RegInfo = 0;
MFInfo = 0;
FrameInfo = new (Allocator.Allocate<MachineFrameInfo>())
MachineFrameInfo(*TM.getFrameInfo());
@ -132,7 +135,8 @@ MachineFunction::~MachineFunction() {
BasicBlocks.clear();
InstructionRecycler.clear(Allocator);
BasicBlockRecycler.clear(Allocator);
RegInfo->~MachineRegisterInfo(); Allocator.Deallocate(RegInfo);
if (RegInfo)
RegInfo->~MachineRegisterInfo(); Allocator.Deallocate(RegInfo);
if (MFInfo) {
MFInfo->~MachineFunctionInfo(); Allocator.Deallocate(MFInfo);
}
@ -255,7 +259,7 @@ void MachineFunction::print(std::ostream &OS) const {
const TargetRegisterInfo *TRI = getTarget().getRegisterInfo();
if (!RegInfo->livein_empty()) {
if (RegInfo && !RegInfo->livein_empty()) {
OS << "Live Ins:";
for (MachineRegisterInfo::livein_iterator
I = RegInfo->livein_begin(), E = RegInfo->livein_end(); I != E; ++I) {
@ -269,7 +273,7 @@ void MachineFunction::print(std::ostream &OS) const {
}
OS << "\n";
}
if (!RegInfo->liveout_empty()) {
if (RegInfo && !RegInfo->liveout_empty()) {
OS << "Live Outs:";
for (MachineRegisterInfo::liveout_iterator
I = RegInfo->liveout_begin(), E = RegInfo->liveout_end(); I != E; ++I)