Chris Lattner 40c62d5069 Fold (select C, load A, load B) -> load (select C, A, B). This happens quite ... a lot throughout many programs. In particular, specfp triggers it a bunch for constant FP nodes when you have code like cond ? 1.0 : -1.0. If the PPC ISel exposed the loads implicit in pic references to external globals, we would be able to eliminate a load in cases like this as well: %X = external global int %Y = external global int int* %test4(bool %C) { %G = select bool %C, int* %X, int* %Y ret int* %G } Note that this breaks things that use SrcValue's (see the fixme), but since nothing uses them yet, this is ok. Also, simplify some code to use hasOneUse() on an SDOperand instead of hasNUsesOfValue directly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23781 91177308-0d34-0410-b5e6-96231b3b80d8		2005-10-18 06:04:22 +00:00
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DAGCombiner.cpp	Fold (select C, load A, load B) -> load (select C, A, B). This happens quite	2005-10-18 06:04:22 +00:00
LegalizeDAG.cpp	Legalize BUILD_PAIR appropriately for upcoming 64 bit PowerPC work.	2005-10-18 00:27:41 +00:00
Makefile	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
ScheduleDAG.cpp	Inhibit instructions from being pushed before function calls. This will	2005-10-13 16:44:00 +00:00
SelectionDAG.cpp	Move some Legalize functionality over to the DAGCombiner where it belongs.	2005-10-13 03:11:28 +00:00
SelectionDAGISel.cpp	Enable Nate's excellent DAG combiner work by default. This allows the	2005-10-10 16:47:10 +00:00
SelectionDAGPrinter.cpp	add a method	2005-10-01 00:17:07 +00:00
TargetLowering.cpp	initialize new flag	2005-09-27 22:13:56 +00:00