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0 pointsj2kun3d ago0 comments

What is kind of annoying is that the author jumps to "I hate compilers" instead of "I will report/help fix this bug upstream."

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chiyc3d ago· 2 in thread

I don't get the sense they hate compilers at all. The writing describes work they seem to love doing. It's just clickbait.

And it may not have crossed their mind that the clang behavior is a bug after finding a workaround. I'd also assume compilers do things "no mere mortal can fully comprehend on their own".

xena3d ago

This might be the first time in my career I have genuinely found a compiler bug. I've been operating under the axiom of "don't assume it's a compiler bug, assume you're fucking it up somehow". When you get to the point that disabling ASLR makes it consistent intra-host I think I've won the right to at least suspect a compiler bug is at play.

I'll go file it upstream after work today.

ammar23d ago

If you feel like increasing your power as per your post, this is a somewhat decent first LLVM issue, take a look at WebAssemblyCFGStackify.cpp :)

llvm/test/CodeGen/WebAssembly/cfg-stackify-eh.ll and friends are existing tests that you can kinda mangle if you want to get a good reproducer.

Also take a look at https://discourse.llvm.org/t/reverse-iteration-bots/72224

Otherwise, happy to put my reproducer/patch on the bug after you file it!

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