scheduler crash on CodeGen/Generic/add-with-overflow-128.ll when running on x86-32

[lattner]

Bugzilla Link	8823
Resolution	FIXED
Resolved on	Dec 23, 2010 00:51
Version	1.0
OS	All
CC	@atrick

Extended Description

CodeGen/Generic/add-with-overflow-128.ll is now crashing when run on x86-32 hosts. To me this looks like some sort of scheduler bug, but I could really use some help tracking this down.

For now, I'm just going to disable the test. If this doesn't get resolved in a couple weeks, I'll start reverting patches to hide the latent bug again.

[atrick]

Fixed in r122472:
In the bottom-up selection DAG scheduling, handle two-address
instructions that read/write unspillable registers. Treat
the entire chain of two-address nodes as a single live range.

[lattner]

Awesome, thanks a lot Andy!