WORD WRITER 128 USER GUIDE GENERATOR
WORD WRITER 128 USER GUIDE MANUAL

This implementation should typically be in the file To make your target actually do something, you need to implement a subclass of (seemingly unrelated) linker errors when linking llc. UsingДЄny other naming scheme will confuse llvm-config and produce a lot of Note that these two naming schemes are hardcoded into llvm-config. Should be implemented in a subdirectory below lib/Target/Dummy (for example, Into LLVMDummењњodeGen and LLVMDummyAsmPrinter, the latter of which It is easiest to copy aД¬MakeLists.txt of another target and modify it. In this new directory, create a CMakeLists.txt. If your target is called вЂњDummyвЂќ, create the

WORD WRITER 128 USER GUIDE GENERATOR

LLVM Target-Independent Code Generator document.ДЇirst, you should create a subdirectory under lib/Target to hold all theДЇiles related to your target. Target-independent code generator, you must perform the steps described in the To actually create your compiler backend, you need to create and modify a fewДЇiles. The class will need and which components will need to be subclassed. Initially, you may not know which private members that files, initially stub up these methods and then TargetJITInfo) that is used to emit binary code directly into memory.

Optionally, add JIT support and create a machine code emitter (subclass of.

TargetSubtarget class, which allows you to use the -mcpu= and You should also write code for a subclass of the

Optionally, add support for subtargets (i.e., variants with differentД¬apabilities).

LLVM-to-assembly conversion and a trivial subclass of TargetAsmInfo. Should also write code for a subclass of AsmPrinter that performs the You should add assembly strings to the instructionsДefined in your target-specific version of TargetInstrInfo.td.

Write code for an assembly printer that converts LLVM IR to a GAS format for.

To replace or remove operations and data types that are not supported Where XXX identifies the specific target, to perform pattern matching andДAG-to-DAG instruction selection. Selects instructions based on additional information in a target-specific Use TableGen to generate code that matches patterns and Graph (DAG) representation of instructions to native target-specific

Describe the selection and conversion of the LLVM IR from a Directed Acyclic.

Machine instructions supported by the target machine.

You should writeДЄdditional code for a subclass of the TargetInstrInfo class to represent TargetInstrFormats.td and TargetInstrInfo.td. Use TableGen to generate codeДЇor target-specific instructions from target-specific versions of

Describe the instruction set of the target.

Represents the class register file data used for register allocation and alsoДescribes the interactions between registers. You should also writeДЄdditional code for a subclass of the TargetRegisterInfo class that Target-specific RegisterInfo.td input file. Register definition, register aliases, and register classes from a

Describe the register set of the target.

Similarly, change code that references вЂњ SparcвЂќ to SparcTargetMachine.cpp and SparcTargetMachine.h, but change the file TargetMachine class and header files for example, start with

Create a subclass of the TargetMachine class that describesД¬haracteristics of your target machine.

Specified target (machine or other language), follow these steps: To write a compiler backend for LLVM that converts the LLVM IR to code for a вЂњUsing AsвЂќ contains a list of target machine dependent The GNU Assembler format ( GAS), see Using As, especially for theДЄssembly printer. For details about the ARM instruction set, refer to the ARMДЄrchitecture Reference Manual. To follow the SPARC examples in this document, have a copy of The SPARC

Writing an LLVM Pass - The assembly printer is a FunctionPass, asДЄre several SelectionDAG processing steps.

td suffix) and generates C++ code that can be used for code TableGen processes input from a target descriptionДЇile (. ( tblgen) application that manages domain-specific information to support

TableGen Overview - a document that describes the TableGen.

Insertion, Late Machine Code Optimizations, and Code Emission. Pay particular attention to theДescriptions of code generation stages: Instruction Selection, Scheduling andДЇormation, SSA-based Optimization, Register Allocation, Prolog/Epilog Code Generation algorithms) for translating the LLVM internal representation into

The LLVM Target-Independent Code Generator - a guide to the components (classes and code.

WORD WRITER 128 USER GUIDE MANUAL

LLVM Language Reference Manual - a reference manual for.

These essential documents must be read before reading this document:

Word writer 128 user guide