Dan Gohman a90c8e690b Fold x-0 to x in unsafe-fp-math mode. This comes up in the ... testcase from PR3376, and in fact is sufficient to completely avoid the problem in that testcase. There's an underlying problem though; TLI.isOperationLegal considers Custom to be Legal, which might be ok in some cases, but that's what DAGCombiner is using in many places to test if something is legal when LegalOperations is true. When DAGCombiner is running after legalize, this isn't sufficient. I'll address this in a separate commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62860 91177308-0d34-0410-b5e6-96231b3b80d8		2009-01-23 19:10:37 +00:00
..
CallingConvLower.cpp	Add "inreg" field to CallSDNode (doesn't increase	2008-09-26 19:31:26 +00:00
CMakeLists.txt	Experimental post-pass scheduling support. Post-pass scheduling	2008-11-19 23:18:57 +00:00
DAGCombiner.cpp	Fold x-0 to x in unsafe-fp-math mode. This comes up in the	2009-01-23 19:10:37 +00:00
FastISel.cpp	Eliminate a couple of fields from TargetRegisterClass: SubRegClasses and SuperRegClasses. These are not necessary. Also eliminate getSubRegisterRegClass and getSuperRegisterRegClass. These are slow and their results can change if register file names change. Just use TargetLowering::getRegClassFor() to get the right TargetRegisterClass instead.	2009-01-22 09:10:11 +00:00
LegalizeDAG.cpp	Add SelectionDAG::getNOT method to construct bitwise NOT operations,	2009-01-22 17:39:32 +00:00
LegalizeFloatTypes.cpp	Cleanup whitespace and comments, and tweak some	2009-01-21 09:00:29 +00:00
LegalizeIntegerTypes.cpp	Cleanup whitespace and comments, and tweak some	2009-01-21 09:00:29 +00:00
LegalizeTypes.cpp	Cleanup whitespace and comments, and tweak some	2009-01-21 09:00:29 +00:00
LegalizeTypes.h	Cleanup whitespace and comments, and tweak some	2009-01-21 09:00:29 +00:00
LegalizeTypesGeneric.cpp	Preserve SourceValue information when lowering produces multiple loads from	2008-12-16 18:25:36 +00:00
LegalizeVectorTypes.cpp	Added missing support to widen an operand from a bit convert.	2009-01-15 22:43:38 +00:00
Makefile	Removed trailing whitespace from Makefiles.	2009-01-09 16:44:42 +00:00
ScheduleDAGFast.cpp	Move a few containers out of ScheduleDAGInstrs::BuildSchedGraph	2009-01-15 19:20:50 +00:00
ScheduleDAGList.cpp	Initial hazard recognizer support in post-pass scheduling. This includes	2009-01-16 01:33:36 +00:00
ScheduleDAGRRList.cpp	Move a few containers out of ScheduleDAGInstrs::BuildSchedGraph	2009-01-15 19:20:50 +00:00
ScheduleDAGSDNodes.cpp	CreateVirtualRegisters does trivial copy coalescing. If a node def is used by a single CopyToReg, it reuses the virtual register assigned to the CopyToReg. This won't work for SDNode that is a clone or is itself cloned. Disable this optimization for those nodes or it can end up with non-SSA machine instructions.	2009-01-16 20:57:18 +00:00
ScheduleDAGSDNodesEmit.cpp	Eliminate a couple of fields from TargetRegisterClass: SubRegClasses and SuperRegClasses. These are not necessary. Also eliminate getSubRegisterRegClass and getSuperRegisterRegClass. These are slow and their results can change if register file names change. Just use TargetLowering::getRegClassFor() to get the right TargetRegisterClass instead.	2009-01-22 09:10:11 +00:00
SelectionDAG.cpp	Fold x-0 to x in unsafe-fp-math mode. This comes up in the	2009-01-23 19:10:37 +00:00
SelectionDAGBuild.cpp	Cleanup whitespace and comments, and tweak some	2009-01-21 09:00:29 +00:00
SelectionDAGBuild.h	Initial checkin of APInt'ififcation of switch lowering	2008-12-23 22:25:27 +00:00
SelectionDAGISel.cpp	Change TargetInstrInfo::isMoveInstr to return source and destination sub-register indices as well.	2009-01-20 19:12:24 +00:00
SelectionDAGPrinter.cpp	Use DebugInfo interface to lower dbg_* intrinsics.	2009-01-13 00:35:13 +00:00
TargetLowering.cpp	Add SelectionDAG::getNOT method to construct bitwise NOT operations,	2009-01-22 17:39:32 +00:00