Target/WebAssembly/WebAssemblyLateEHPrepare.cpp

33   bool runOnMachineFunction(MachineFunction &MF) override;
34   bool addCatches(MachineFunction &MF);
35   bool replaceFuncletReturns(MachineFunction &MF);
36   bool removeUnnecessaryUnreachables(MachineFunction &MF);
37   bool addExceptionExtraction(MachineFunction &MF);
38   bool restoreStackPointer(MachineFunction &MF);
61   MachineFunction *MF = MI->getParent()->getParent();
77     if (MBB == &MF->front())
102 bool WebAssemblyLateEHPrepare::runOnMachineFunction(MachineFunction &MF) {
105                     << MF.getName() << '\n');
107   if (MF.getTarget().getMCAsmInfo()->getExceptionHandlingType() !=
112   if (MF.getFunction().hasPersonalityFn()) {
113     Changed |= addCatches(MF);
114     Changed |= replaceFuncletReturns(MF);
116   Changed |= removeUnnecessaryUnreachables(MF);
117   if (MF.getFunction().hasPersonalityFn()) {
118     Changed |= addExceptionExtraction(MF);
119     Changed |= restoreStackPointer(MF);
125 bool WebAssemblyLateEHPrepare::addCatches(MachineFunction &MF) {
127   const auto &TII = *MF.getSubtarget<WebAssemblySubtarget>().getInstrInfo();
128   MachineRegisterInfo &MRI = MF.getRegInfo();
129   for (auto &MBB : MF) {
143 bool WebAssemblyLateEHPrepare::replaceFuncletReturns(MachineFunction &MF) {
145   const auto &TII = *MF.getSubtarget<WebAssemblySubtarget>().getInstrInfo();
147   for (auto &MBB : MF) {
185     MachineFunction &MF) {
187   for (auto &MBB : MF) {
235 bool WebAssemblyLateEHPrepare::addExceptionExtraction(MachineFunction &MF) {
236   const auto &TII = *MF.getSubtarget<WebAssemblySubtarget>().getInstrInfo();
237   MachineRegisterInfo &MRI = MF.getRegInfo();
238   auto *EHInfo = MF.getWasmEHFuncInfo();
241   for (auto &MBB : MF) {
259   for (auto &MBB : MF) {
298     auto *ThenMBB = MF.CreateMachineBasicBlock();
299     auto *ElseMBB = MF.CreateMachineBasicBlock();
300     MF.insert(std::next(MachineFunction::iterator(EHPad)), ElseMBB);
301     MF.insert(std::next(MachineFunction::iterator(ElseMBB)), ThenMBB);
308     const char *CPPExnSymbol = MF.createExternalSymbolName("__cpp_exception");
340           MF.getFunction().getParent()->getFunction(
364 bool WebAssemblyLateEHPrepare::restoreStackPointer(MachineFunction &MF) {
366       MF.getSubtarget().getFrameLowering());
367   if (!FrameLowering->needsPrologForEH(MF))
371   for (auto &MBB : MF) {
387     FrameLowering->writeSPToGlobal(WebAssembly::SP32, MF, MBB, InsertPos,