[LLVMdev] recursing llvm

[Duncan Sands]

Hi Reed,

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

the buildbots are doing this on every commit (though they can't always keep
up, so it's more like every 5 commits).

Ciao, Duncan.

>
> 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
>
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