[LLVMdev] -debug and -print-machineinstrs broken

[Dan Gohman]

On Nov 13, 2009, at 1:49 PM, David Greene wrote:

> On Friday 13 November 2009 15:17, you wrote:
>>> Are these known to be broken right now? I get failure when using either.
>>> 
>>> $ llc -march=arm -print-machineinstrs hw.bc
>> 
>> Seems due to David's patches.
> 
> Ok, it's faulting in SlotTracker with what looks like a bad Function.  One of 
> the Argument values is corrupted.
> 
> I'm not abdicating responsibility, but at the moment I don't see the 
> connection to my patches.  Anton, are you seeing something specific
> as to the cause?
> 
> I will keep investigating.

The cause was isa<Instruction> was returning true for the new
FixedStackPseudoSourceValue values. I fixed it on trunk, and
added a comment to hopefully protect against others making
this mistake in the future.

Dan