[llvm-commits] [llvm] r47758 - in /llvm/trunk: lib/CodeGen/RegAllocLocal.cpp test/CodeGen/ARM/2008-02-29-RegAllocLocal.ll

[Chris Lattner]

On Feb 29, 2008, at 1:34 PM, Bill Wendling wrote:

> On Fri, Feb 29, 2008 at 1:22 PM, Chris Lattner <clattner at apple.com>  
> wrote:
>>
>> On Feb 29, 2008, at 11:19 AM, Bill Wendling wrote:
>>
>>> On Fri, Feb 29, 2008 at 11:15 AM, Anton Korobeynikov
>>> <asl at math.spbu.ru> wrote:
>>>> Hello, Bill
>>>>
>>>>
>>>>> + at _ZL20__gthrw_pthread_oncePiPFvvE = alias weak i32 (i32*, void
>>>>> ()*)* @pthread_once           ; <i32 (i32*, void ()*)*> [#uses=0]
>>>>> + at _ZL27__gthrw_pthread_getspecificj = alias weak i8* (i32)*
>>>>> @pthread_getspecific              ; <i8* (i32)*> [#uses=0]
>>>> What's about DCE'ing this testcase little bit? :)
>>>>
>>> Hi Anton,
>>
>>>
>>> This is the output from bugpoint. ;-) We should probably modify
>>> bugpoint to do this for us. Anyway, sure. I'll give it a shot.
>>
>> If it is a single function, llvm-extract is good at doing this, just
>> use llvm-extract -func whatever foo.bc
>>
> Good point. Anton also suggested running opt with -dce,
> -strip-dead-prototypes, -deadtypeelim, etc.

llvmextract runs strip-dead-prototypes, -deadtypeelim.

Usually dce is bad because it removes instructions that are important  
to the failure.  Did you verify that you didn't break the testcase by  
cleaning it up?

-chris