Chris Lattner 1d6373c1af teach selection dag mask tracking about the fact that select_cc operates like ... select. Also teach it that the bit count instructions can only set the low bits of the result, depending on the size of the input. This allows us to compile this: int %eq0(int %a) { %tmp.1 = seteq int %a, 0 ; <bool> [#uses=1] %tmp.2 = cast bool %tmp.1 to int ; <int> [#uses=1] ret int %tmp.2 } To this: _eq0: cntlzw r2, r3 srwi r3, r2, 5 blr instead of this: _eq0: cntlzw r2, r3 rlwinm r3, r2, 27, 31, 31 blr when setcc is marked illegal on ppc (which restores parity to non-illegal setcc). Thanks to Nate for pointing this out. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23013 91177308-0d34-0410-b5e6-96231b3b80d8		2005-08-24 16:46:55 +00:00
..
LegalizeDAG.cpp	Start using isOperationLegal and isTypeLegal to simplify the code	2005-08-24 16:35:28 +00:00
Makefile	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
ScheduleDAG.cpp	Add a fast-path for register values. Add support for constant pool entries,	2005-08-22 01:04:32 +00:00
SelectionDAG.cpp	teach selection dag mask tracking about the fact that select_cc operates like	2005-08-24 16:46:55 +00:00
SelectionDAGISel.cpp	Make -view-isel-dags show the dag before instruction selecting, in case	2005-08-24 00:34:29 +00:00
SelectionDAGPrinter.cpp	Print physreg register nodes with target names (e.g. F1) instead of numbers	2005-08-19 21:21:16 +00:00
TargetLowering.cpp	Adjust to new interface	2005-08-24 16:34:12 +00:00