llvm-6502/lib/Target/Mips
Dan Gohman 8be6bbe5bf Eliminate the ISel priority queue, which used the topological order for a
priority function. Instead, just iterate over the AllNodes list, which is
already in topological order. This eliminates a fair amount of bookkeeping,
and speeds up the isel phase by about 15% on many testcases.

The impact on most targets is that AddToISelQueue calls can be simply removed.

In the x86 target, there are two additional notable changes.

The rule-bending AND+SHIFT optimization in MatchAddress that creates new
pre-isel nodes during isel is now a little more verbose, but more robust.
Instead of either creating an invalid DAG or creating an invalid topological
sort, as it has historically done, it can now just insert the new nodes into
the node list at a position where they will be consistent with the topological
ordering.

Also, the address-matching code has logic that checked to see if a node was
"already selected". However, when a node is selected, it has all its uses
taken away via ReplaceAllUsesWith or equivalent, so it won't recieve any
further visits from MatchAddress. This code is now removed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58748 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-05 04:14:16 +00:00
..
CMakeLists.txt CMake: Builds all targets. 2008-09-26 04:40:32 +00:00
Makefile
Mips.h
Mips.td
MipsAsmPrinter.cpp Switch the MachineOperand accessors back to the short names like 2008-10-03 15:45:36 +00:00
MipsCallingConv.td
MipsDelaySlotFiller.cpp
MipsInstrFormats.td
MipsInstrFPU.td
MipsInstrInfo.cpp Const-ify several TargetInstrInfo methods. 2008-10-16 01:49:15 +00:00
MipsInstrInfo.h Const-ify several TargetInstrInfo methods. 2008-10-16 01:49:15 +00:00
MipsInstrInfo.td Change CALLSEQ_BEGIN and CALLSEQ_END to take TargetConstant's as 2008-10-11 22:08:30 +00:00
MipsISelDAGToDAG.cpp Eliminate the ISel priority queue, which used the topological order for a 2008-11-05 04:14:16 +00:00
MipsISelLowering.cpp Teach DAGCombine to fold constant offsets into GlobalAddress nodes, 2008-10-18 02:06:02 +00:00
MipsISelLowering.h Teach DAGCombine to fold constant offsets into GlobalAddress nodes, 2008-10-18 02:06:02 +00:00
MipsMachineFunction.h
MipsRegisterInfo.cpp Switch the MachineOperand accessors back to the short names like 2008-10-03 15:45:36 +00:00
MipsRegisterInfo.h
MipsRegisterInfo.td
MipsSchedule.td
MipsSubtarget.cpp
MipsSubtarget.h
MipsTargetAsmInfo.cpp Refactor various TargetAsmInfo subclasses' TargetMachine members away 2008-11-03 18:22:42 +00:00
MipsTargetAsmInfo.h
MipsTargetMachine.cpp Fix command-line option printing to print two spaces where needed, 2008-10-14 20:25:08 +00:00
MipsTargetMachine.h