98 // Represents the state of a block terminator.
100   // If this terminator is a relaxable branch, this points to the branch
104   // The address that we currently assume the terminator has.
107   // The current size of the terminator in bytes.
152   void skipTerminator(BlockPosition &Position, TerminatorInfo &Terminator,
156   bool mustRelaxBranch(const TerminatorInfo &Terminator, uint64_t Address);
161   void relaxBranch(TerminatorInfo &Terminator);
178 // accordingly and move Position to the end of the block's non-terminator
200 // Position describes the state immediately before Terminator.
201 // Update Terminator accordingly and move Position past it.
202 // Assume that Terminator will be relaxed if AssumeRelaxed.
204                                        TerminatorInfo &Terminator,  in skipTerminator()  argument
206   Terminator.Address = Position.Address;  in skipTerminator()
207   Position.Address += Terminator.Size;  in skipTerminator()
209     Position.Address += Terminator.ExtraRelaxSize;  in skipTerminator()
212 // Return a description of terminator instruction MI.
214   TerminatorInfo Terminator;  in describeTerminator()  local
215   Terminator.Size = TII->getInstSizeInBytes(MI);  in describeTerminator()
220       Terminator.ExtraRelaxSize = 2;  in describeTerminator()
224       Terminator.ExtraRelaxSize = 2;  in describeTerminator()
229       Terminator.ExtraRelaxSize = 6;  in describeTerminator()
233       Terminator.ExtraRelaxSize = 0;  in describeTerminator()
238       Terminator.ExtraRelaxSize = 2;  in describeTerminator()
243       Terminator.ExtraRelaxSize = 4;  in describeTerminator()
248       Terminator.ExtraRelaxSize = 4;  in describeTerminator()
253       Terminator.ExtraRelaxSize = 6;  in describeTerminator()
258     Terminator.Branch = &MI;  in describeTerminator()
259     Terminator.TargetBlock =  in describeTerminator()
262   return Terminator;  in describeTerminator()
298         assert(MI->isTerminator() && "Terminator followed by non-terminator");  in initMBBInfo()
310 // Return true if, under current assumptions, Terminator would need to be
312 bool SystemZLongBranch::mustRelaxBranch(const TerminatorInfo &Terminator,  in mustRelaxBranch()  argument
314   if (!Terminator.Branch || Terminator.ExtraRelaxSize == 0)  in mustRelaxBranch()
317   const MBBInfo &Target = MBBs[Terminator.TargetBlock];  in mustRelaxBranch()
329 // Return true if, under current assumptions, any terminator needs
332   for (auto &Terminator : Terminators)  in mustRelaxABranch()  local
333     if (mustRelaxBranch(Terminator, Terminator.Address))  in mustRelaxABranch()
389 // Relax the branch described by Terminator.
390 void SystemZLongBranch::relaxBranch(TerminatorInfo &Terminator) {  in relaxBranch()  argument
391   MachineInstr *Branch = Terminator.Branch;  in relaxBranch()
433   Terminator.Size += Terminator.ExtraRelaxSize;  in relaxBranch()
434   Terminator.ExtraRelaxSize = 0;  in relaxBranch()
435   Terminator.Branch = nullptr;  in relaxBranch()