llvm-mirror

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History

Chandler Carruth 81e2f0deb5 [SDAG] Remove the reliance on MI's allocation strategy for `MachineMemOperand` pointers attached to `MachineSDNodes` and instead have the `SelectionDAG` fully manage the memory for this array. Prior to this change, the memory management was deeply confusing here -- The way the MI was built relied on the `SelectionDAG` allocating memory for these arrays of pointers using the `MachineFunction`'s allocator so that the raw pointer to the array could be blindly copied into an eventual `MachineInstr`. This creates a hard coupling between how `MachineInstr`s allocate their array of `MachineMemOperand` pointers and how the `MachineSDNode` does. This change is motivated in large part by a change I am making to how `MachineFunction` allocates these pointers, but it seems like a layering improvement as well. This would run the risk of increasing allocations overall, but I've implemented an optimization that should avoid that by storing a single `MachineMemOperand` pointer directly instead of allocating anything. This is expected to be a net win because the vast majority of uses of these only need a single pointer. As a side-effect, this makes the API for updating a `MachineSDNode` and a `MachineInstr` reasonably different which seems nice to avoid unexpected coupling of these two layers. We can map between them, but we shouldn't be surprised at where that occurs. =] Differential Revision: https://reviews.llvm.org/D50680 llvm-svn: 339740		2018-08-14 23:30:32 +00:00
..
Disassembler
InstPrinter
MCTargetDesc
TargetInfo
CMakeLists.txt
LLVMBuild.txt
README.txt
XCore.h
XCore.td
XCoreAsmPrinter.cpp
XCoreCallingConv.td
XCoreFrameLowering.cpp
XCoreFrameLowering.h
XCoreFrameToArgsOffsetElim.cpp
XCoreInstrFormats.td
XCoreInstrInfo.cpp
XCoreInstrInfo.h
XCoreInstrInfo.td
XCoreISelDAGToDAG.cpp	[SDAG] Remove the reliance on MI's allocation strategy for	2018-08-14 23:30:32 +00:00
XCoreISelLowering.cpp
XCoreISelLowering.h
XCoreLowerThreadLocal.cpp
XCoreMachineFunctionInfo.cpp
XCoreMachineFunctionInfo.h
XCoreMCInstLower.cpp
XCoreMCInstLower.h
XCoreRegisterInfo.cpp
XCoreRegisterInfo.h
XCoreRegisterInfo.td
XCoreSelectionDAGInfo.cpp
XCoreSelectionDAGInfo.h
XCoreSubtarget.cpp
XCoreSubtarget.h
XCoreTargetMachine.cpp
XCoreTargetMachine.h
XCoreTargetObjectFile.cpp
XCoreTargetObjectFile.h
XCoreTargetStreamer.h
XCoreTargetTransformInfo.h

README.txt

To-do
-----

* Instruction encodings
* Tailcalls
* Investigate loop alignment
* Add builtins