[LLVMdev] Load from abs address generated bad code on LLVM 2.4

[Chris Lattner]

On Jan 20, 2009, at 2:10 AM, Andrew Haley wrote:

> Chris Lattner wrote:
>> On Jan 19, 2009, at 7:55 AM, Andrew Haley wrote:
>>
>>> This is x86_64.  I have a problem where an absolute memory load
>>> The current LLVM trunk does not have this bug.  This seems quite a
>>> nasty
>>> bug; is there any chance of a bug-fix release for LLVM 2.4, or
>>> should I
>>> just use LLVM trunk until LLVM 2.5 ?
>>
>> As others have pointed out, using a global and addglobalmapping is a
>> great workaround for the problem.
>
> Thanks.
>
>> We generally don't do "dot" releases, since we have a short release
>> cycle anyway.  The 2.5 release process is slated to start this week.
>
> Mmm, but the problem is that interfaces keep changing, so simply
> upgrading to the latest release isn't possible.  Even the tiny
> test case I posted doesn't work with the latest version: there
> were changes needed to get it to compile.  Also, I can no longer
> figure out how to turn on debugging dumps in the JIT.  The simple
>
>   DebugFlag = true;
>   CurrentDebugType = "x86-emitter";
>
> no longer works, and there seems to be no replacement for it.

That should work fine, just use "jit" instead of "x86-emitter" as the  
debug type.

-Chris