Dan Gohman 2ba60e5930 Eliminate LegalizeOps' LegalizedNodes map and have it just call RAUW ... on every node as it legalizes them. This makes it easier to use hasOneUse() heuristics, since unneeded nodes can be removed from the DAG earlier. Make LegalizeOps visit the DAG in an operands-last order. It previously used operands-first, because LegalizeTypes has to go operands-first, and LegalizeTypes used to be part of LegalizeOps, but they're now split. The operands-last order is more natural for several legalization tasks. For example, it allows lowering code for nodes with floating-point or vector constants to see those constants directly instead of seeing the lowered form (often constant-pool loads). This makes some things somewhat more complicated today, though it ought to allow things to be simpler in the future. It also fixes some bugs exposed by Legalizing using RAUW aggressively. Remove the part of LegalizeOps that attempted to patch up invalid chain operands on libcalls generated by LegalizeTypes, since it doesn't work with the new LegalizeOps traversal order. Instead, define what LegalizeTypes is doing to be correct, and transfer the responsibility of keeping calls from having overlapping calling sequences into the scheduler. Teach the scheduler to model callseq_begin/end pairs as having a physical register definition/use to prevent calls from having overlapping calling sequences. This is also somewhat complicated, though there are ways it might be simplified in the future. This addresses rdar://9816668, rdar://10043614, rdar://8434668, and others. Please direct high-level questions about this patch to management. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143177 91177308-0d34-0410-b5e6-96231b3b80d8		2011-10-28 01:29:32 +00:00
..
CMakeLists.txt	Really unbreak CMake build	2011-10-24 18:10:52 +00:00
DAGCombiner.cpp	Don't crash on 128-bit sdiv by constant. Found by inspection.	2011-10-27 02:06:39 +00:00
FastISel.cpp	Fix a thinko that Nick noticed. The previous code actually worked as	2011-10-12 15:56:56 +00:00
FunctionLoweringInfo.cpp
InstrEmitter.cpp
InstrEmitter.h
LegalizeDAG.cpp	Eliminate LegalizeOps' LegalizedNodes map and have it just call RAUW	2011-10-28 01:29:32 +00:00
LegalizeFloatTypes.cpp
LegalizeIntegerTypes.cpp	1. Fix the widening of SETCC in WidenVecOp_SETCC. Use the correct return CC type.	2011-10-21 11:42:07 +00:00
LegalizeTypes.cpp	Eliminate LegalizeOps' LegalizedNodes map and have it just call RAUW	2011-10-28 01:29:32 +00:00
LegalizeTypes.h	1. Fix the widening of SETCC in WidenVecOp_SETCC. Use the correct return CC type.	2011-10-21 11:42:07 +00:00
LegalizeTypesGeneric.cpp
LegalizeVectorOps.cpp	Improve code generation for vselect on SSE2:	2011-10-19 20:43:16 +00:00
LegalizeVectorTypes.cpp	Simplify SplitVecRes_UnaryOp by removing all the code that is	2011-10-26 14:11:18 +00:00
Makefile
ScheduleDAGFast.cpp
ScheduleDAGRRList.cpp	Eliminate LegalizeOps' LegalizedNodes map and have it just call RAUW	2011-10-28 01:29:32 +00:00
ScheduleDAGSDNodes.cpp
ScheduleDAGSDNodes.h
SDNodeDbgValue.h
SDNodeOrdering.h
SelectionDAG.cpp	Eliminate LegalizeOps' LegalizedNodes map and have it just call RAUW	2011-10-28 01:29:32 +00:00
SelectionDAGBuilder.cpp	Don't use floating point to do an integer's job.	2011-10-26 01:47:48 +00:00
SelectionDAGBuilder.h	Remove the old atomic instrinsics. autoupgrade functionality is included with this patch.	2011-10-06 23:20:49 +00:00
SelectionDAGISel.cpp	Delete the Latency scheduling preference.	2011-10-24 17:56:48 +00:00
SelectionDAGPrinter.cpp
TargetLowering.cpp	Change the default scheduler from Latency to ILP, since Latency	2011-10-24 17:45:02 +00:00
TargetSelectionDAGInfo.cpp