Dan Gohman 760f86f339 Don't create ISD::FNEG nodes after legalize if they aren't legal. ...

Simplify x+0 to x in unsafe-fp-math mode. This avoids a bunch of
redundant work in many cases, because in unsafe-fp-math mode,
ISD::FADD with a constant is considered free to negate, so the
DAGCombiner often negates x+0 to -0-x thinking it's free, when
in reality the end result is -x, which is more expensive than x.

Also, combine x*0 to 0.

This fixes PR3374.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62789 91177308-0d34-0410-b5e6-96231b3b80d8

2009-01-22 21:58:43 +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

Don't create ISD::FNEG nodes after legalize if they aren't legal.

2009-01-22 21:58:43 +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

Don't create ISD::FNEG nodes after legalize if they aren't legal.

2009-01-22 21:58:43 +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