[llvm-dev] llc gives Segmentation fault at instruction selection [was Re: Instruction selection gives "LLVM ERROR: Cannot select"]

Tim Northover via llvm-dev llvm-dev at lists.llvm.org
Thu Feb 4 09:57:34 PST 2016

Hi Alex,

On 4 February 2016 at 03:19, RCU <alex.e.susu at gmail.com> wrote:
> But now I bumped into another serious problem: llc gives segmentation
> fault while doing instruction select on the store.

Are you building with assertions enabled? You can get segfaults still,
but they're much rarer.

Other than that, I'm afraid I don't know what the problem is. If
you've got custom C++ to handle stores in some way, that would be the
first place to look. It seems to be happening while creating a node,
so it's obviously also worth investigating where Ops comes from there.

> I can provide the entire DOT output with -view-isel-dags

I'd certainly be willing to look at that file for anything malformed or odd.



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