[LLVMdev] Assertion: replaceAllUses of value with new value of different type! being thrown all of a sudden

[Duncan P. N. Exon Smith]

> On 2015-Jan-19, at 12:38, Frédéric Riss <friss at apple.com> wrote:
> 
> 
>> On Jan 19, 2015, at 12:04 PM, Christian Schafmeister <chris.schaf at verizon.net> wrote:
>> 
>> 
>> I forgot to mention this in my initial email.
>> 
>> The build of LLVM that I was using was commit a0d5d7aed8e177cea381b3d054d80c212ece9f2c
>> The date on the commit is: Date:   Fri Sep 26 12:34:06 2014
>> 
>> Also:
>> Today I grabbed the ToT llvm/clang/clang-extra-tools  and I’m working on getting my code to be compatible with it.
>> 
>> I can switch back and forth between the current ToT llvm and the old one.
> 
> Hmmm, I didn’t look closely enough and I thought you were hitting an assertions I added a few weeks after that commit in the Metadata RAUW method. But it is the equivalent assertion in Value::RAUW that you are hitting and that has been there forever. Looking at your exact revision, the assertion seems to trigger while executing:
> 
> DIType(TempEnumTypes).replaceAllUsesWith(Enums);
> 
> in DIBuilder::finalize(). Can you check if TempEnumTypes is null at this point? If that is the issue (which I’m not sure), then you need to call DIBuilder::createCompileUnit() at some point.
> 
> Fred

I had a thought, too: are you using two different `LLVMContext`s?  That
would cause the `metadata` type to compare unequal.