The function createTailCallBranchInstr assumes that the iterator MBBI is valid.
However, only one use of MBBI is guarded in the function.
Fix this by adding an assert.
Differential Revision: https://reviews.llvm.org/D41358
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321205
91177308-0d34-0410-b5e6-
96231b3b80d8
void PPCFrameLowering::createTailCallBranchInstr(MachineBasicBlock &MBB) const {
MachineBasicBlock::iterator MBBI = MBB.getFirstTerminator();
- DebugLoc dl;
- if (MBBI != MBB.end())
- dl = MBBI->getDebugLoc();
+ // If we got this far a first terminator should exist.
+ assert(MBBI != MBB.end() && "Failed to find the first terminator.");
+ DebugLoc dl = MBBI->getDebugLoc();
const PPCInstrInfo &TII = *Subtarget.getInstrInfo();
// Create branch instruction for pseudo tail call return instruction