[llvm-dev] Replacing an instruction in a post-RA pass

[Krzysztof Parzyszek via llvm-dev]

On 5/9/2016 2:43 PM, Phil Tomson via llvm-dev wrote:
>
>         MachineBasicBlock::instr_iterator II = MFI->instr_begin();
>         while( II != MFI->instr_end()) {
>           [...]
>                  MachineBasicBlock::instr_iterator NII = std::next(II);
>[...]
>                  MI.eraseFromParent();
>                  II = NII;
>                }
>              }
>            }
>            ++II;
>
> Unfortunately, this leads to a segfault. Is this the proper way to do
> this or is there another suggested way of doing it?

What if II is the last instruction?

-Krzysztof


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