llvm-tblgen segmentaion fault about repo HOT 11 CLOSED

Hmm, the llvm update went fine for me on musl (11.0.1 -> 11.1.0). Unfortunately I won't be able to test this for a while because I lost my musl chroot due to a silly typo :/

What CFLAGS and CXXFLAGS are you using ? Try setting them to -Os (or -O2) -pipe -march=native

If the above fails then you can try building with an existing clang instead of gcc

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Yes, that's what I did. I had -O3 -pipe -march=native -mtune=native, since I suspected a compiler bug or llvm bug I changed it to -O2 optimization and it did not crash. Still that is freaking disgusting. The bug is still there and someone has to fix it. I need to bisect what's at fault here.

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That's pretty weird... O3 usually doesn't cause any problems, most of the issues are caused by LTO stuff.

from repo.

It could also be one of -march=native -mtune=native I compiled without them.

from repo.

I would expect an issue if you were using LTO, but not this issue.
I've built llvm 11.1.0 on three different installs so far with no issues, I don't think this is a CFLAGS problem (my most aggressive being -O3 -fno-math-errno -pipe -march=native -mtune=native)

That log doesn't seem complete. At least, if it is, it's basically useless for me.

from repo.

Here is the full log :
llvmbuild.LOG

from repo.

Shame the full log isn't more helpful.

You're not modifying the llvm build at all, correct? Maybe seeing what is in env will help... Have you changed anything else in the 'guts'? Maybe some gcc change you've made or some such other alteration?

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No, it's a compiler bug it seems, when I remove the -march=native -mtune=native everything compiles fine, even with -O3

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Now that is quite strange

from repo.

Not really, compiler bugs happen quite often. Usually I run into 1 bug every month. Since the bug is somehow tied to my settings that are cpu dependant (march=native -mtune=native) you won't be able to reproduce them I suppose unless you have the same cpu as I do, which is Intel Pentium Silver N5000. That is pretty rare one to find.

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Closing because this seems to be strictly an llvm problem. gl :(

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