Infinite loop while building libxml

[llvmbot]

Bugzilla Link	3353
Resolution	FIXED
Resolved on	Jan 19, 2009 15:21
Version	trunk
OS	Linux
Attachments	testcase
Reporter	LLVM Bugzilla Contributor
CC	@lattner

Extended Description

To reproduce:

opt test.bc -inline -jump-threading -licm -loop-unswitch -gvn -simplifycfg -verify -o t.bc

[llvmbot]

Hangs in jump threading.

[llvmbot]

this was introduced by revision 60780.

r60780 | lattner | 2008-12-09 19:25:07 +0000 (Tue, 09 Dec 2008) | 10 lines

Switch GVN::processNonLocalLoad to using the new
MemDep::getNonLocalPointerDependency method. There are
some open issues with this (missed optimizations) and
plenty of future work, but this does allow GVN to eliminate
slightly more loads (49246 vs 49033).

Switching over now allows simplification of the other code
path in memdep.

[lattner]

taking a look!

[lattner]

Fixed, sorry for the breakage!
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20090119/072364.html