[LLVMdev] recursing llvm

[Reed Kotler]

Okay. Cool.

So do you bootrstrap and verify  as part of the usual testing?

Do the nightly scripts do this?

Reed

On 06/28/2012 11:08 AM, Eric Christopher wrote:
> On Jun 27, 2012, at 10:48 PM, Reed Kotler<rkotler at mips.com>  wrote:
>
>> On 06/27/2012 05:00 PM, Eric Christopher wrote:
>>> On Jun 19, 2012, at 5:24 PM, reed kotler<rkotler at mips.com>   wrote:
>>>
>>>> Do the llvm nightly scripts "recurse" the compiler or just test that it
>>>> can self host itself?
>>>>
>>> No idea what you mean here. Can you explain?
>>>
>>> -eric
>> recursing a compiler means this.
>>
>> clang/llvm source == src
>>
>> compile src using clang/llvm (which may have been built using gcc) ->  clang/llvm'   (prime)
>>
>> compile src using clang/llvm' ->  clang/llvm''
>>
>> verify that the binaries for clang/llvm' == binaries for clang/llvm''
>>
>> A compiler can be self hosted (made using itself) by just producing clang/llvm'
>>
>> That is not as strong a test as recursing the compiler, even though you might run the full
>> test suite using clang/llvm"
> So... what I said? This is usually called a "bootstrap" of the compiler with "verification".
>
> -eric