Bill Wendling 36ae6c1827 The DAG combiner was performing a BT combine. The BT combine had a value of -1, ... so it changed it into a 31 via the TLO.ShrinkDemandedConstant() call. Then it would go through the DAG combiner again. This time it had a value of 31, which was turned into a -1 by TLI.SimplifyDemandedBits(). This would ping pong forever. Teach the TLO.ShrinkDemandedConstant() call not to lower a value if the demanded value is an XOR of all ones. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65985 91177308-0d34-0410-b5e6-96231b3b80d8		2009-03-04 00:18:06 +00:00
..
Alpha	Fix Alpha test and support for private linkage.	2009-01-15 21:51:46 +00:00
ARM	Last commit accidentially deleted this code.	2009-02-28 06:02:14 +00:00
CBackend	Fix PR2907 by digging through constant expressions to find FP constants that	2008-10-22 04:53:16 +00:00
CellSPU	Used "-enable-unsafe-fp-math" to allow this transformation - (a * b -c) = c - a *b.	2009-01-31 06:50:54 +00:00
CPP
Generic	bug 3610: Test case.	2009-02-22 15:54:44 +00:00
IA64	Add the private linkage.	2009-01-15 20:18:42 +00:00
Mips	Add the private linkage.	2009-01-15 20:18:42 +00:00
PowerPC	Private linkage support for PPC / Darwin.	2009-01-25 06:32:01 +00:00
SPARC	Add the private linkage.	2009-01-15 20:18:42 +00:00
X86	The DAG combiner was performing a BT combine. The BT combine had a value of -1,	2009-03-04 00:18:06 +00:00
XCore	Add the private linkage.	2009-01-15 20:18:42 +00:00