[LLVMdev] ICE while building llvm-gcc

[Nick Lewycky]

Jeffrey Yasskin wrote:

> Comparing stages 2 and 3
> warning: ./cc1-checksum.o differs
> warning: ./cc1plus-checksum.o differs
> Bootstrap comparison failure!
> ./c-decl.o differs
> ./cp/decl.o differs
> ./df-core.o differs
> ./gcc.o differs
> ./i386.o differs
> ./stor-layout.o differs
> ./tree-pretty-print.o differs
> ./tree.o differs
> make[2]: *** [compare] Error 1
> make[1]: *** [stage3-bubble] Error 2
> make: *** [all] Error 2

I've been seeing the same error today, and Anton mentioned seeing it as 
well on IRC. I've decided to file this as PR 3227 and cc you.

What I'm going to do is take a known good LLVM version, a known failing 
LLVM version, and bisect them to see where the failure was introduced.

It's possible that it could have been introduced while the GVN bug 
(llvm.org/PR3217, the ICE you had at the start of this thread) was 
around, and that will complicate the bisection...

> I got a very similar error (but with a few more differing .o files)
> when I synced to a revision that had worked on my Linux box. This is
> with just a `make`, not `make bootstrap`, so I'm surprised it's even
> doing this comparison, but I also don't know how to debug it.
> http://www.google.com/search?q=Bootstrap+comparison+site%3Alists.cs.uiuc.edu%2Fpipermail
> doesn't find any results either.

Yeah, a bootstrap build is the default these days. I'm pretty sure 
that's true for FSF GCC as well.

Nick

> Thanks again,
> Jeffrey
> 
> On Tue, Dec 16, 2008 at 10:43 AM, Chris Lattner <clattner at apple.com> wrote:
>> On Dec 16, 2008, at 10:34 AM, Jeffrey Yasskin wrote:
>>
>>> I'm on OSX 10.5, trying to build a svn checkout of llvm-gcc. I've also
>>> checked out llvm. Both are synced to r61075.
>> hi Jeffrey,
>>
>> This patch should have fixed the problem:
>> http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20081215/071210.html
>>
>> Please update and try again, sorry for the breakage!
>>
>> -Chris
>>
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