[cfe-dev] clang unable to build example C file

Chris Lattner clattner at apple.com
Fri Oct 12 10:51:14 PDT 2007

On Oct 12, 2007, at 4:50 AM, Török Edvin wrote:

> On 10/12/07, Chris Lattner <clattner at apple.com> wrote:
>> It is somewhat convoluted, but len is set when the identifier is
>> lexed.  The codepath is through the
>> StringMap<IdentifierInfo>::GetOrCreateValue method, which calls
>> StringMapEntry<IdentifierInfo>::Create, which sets the size on line
>> 155 of llvm/include/llvm/ADT/StringMap.h.
>> I don't see how there could be a problem here, everything looks
>> reasonable.
> Ok, it is something wrong with StringMap.h, but the testcases don't  
> catch it.
> See patch at end of this mail.
Ahhh, I see.

> When I apply this patch clang can successfully compile t.c!!

Nice!  I applied this patch, please verify it also fixes it for you:

> The CodeGen failure (both w/, and w/o my patch) is this one:
>  FAIL: /home/edwin/llvm-svn/llvm/test/CodeGen/X86/2007-09-17- 
> ObjcFrameEH.ll
> Failed with exit(1) at line 1
> while running: llvm-as <
> /home/edwin/llvm-svn/llvm/test/CodeGen/X86/2007-09-17-ObjcFrameEH.ll |
> llc -march=x86 -enable-eh | grep {isNullOrNil].eh"} | wc -l | grep 2
> child process exited abnormally

This was failing for other people as well, I think the testcase  
should be fixed on mainline now.

Thanks for the help!


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