molecular

Revision 48 - 2012-05-19 at 17:47:47

LLVM

• LLVM Documents

  1. LLVM Doxygen
  2. LLVM Programmers Manual
  3. LLVM Language Reference Manual
  4. LLVM Target-Independent Code Generator
  5. Writing an LLVM Compiler Backend
  6. TableGen Fundamentals

• Research and Open Source Project

  1. Developer Resources From GPGPU
  2. Whole-Function Vectorization

• Retargeting

  1. Tutorial : Building a backend in 24 hours (2009)
  2. Tutorial : Building a backend in 24 hours (2012)
  3. CodeGen Overview and Focus on SelectionDAGs
  4. Design and Implementation of a TriCore Backend for the LLVM Compiler Framework

• Resources

  1. LLVM Developers' Meeting

• Useful Post in llvm-dev list

  1. [LLVMdev] Understanding SelectionDAG construction
  2. [LLVMdev] Data layout and Optimization
  3. [LLVMdev] CodeGen instructions and patterns
  4. [LLVMdev] Pattern matching in a SelectionDAG
  5. [LLVMdev] Conceptual difference between "Unallocatable" and "Reserved" registers.
  6. [LLVMdev] The meaning of SDNPHasChain
  7. [LLVMdev] Question about 'side-effect' and 'chain'
  8. [LLVMdev] Difference between pattern and dag2dag isels
  9. [LLVMdev] Question about porting LLVM - code selection without assembler feature
  10. [LLVMdev] Where can I find an explanation of $src1, $src2, $in, $ptr, etc.?
  11. [LLVMdev] Adding a custom calling convention
  12. [LLVMdev] LLVM new backend compiling/linking problem
  13. [LLVMdev] Meaning of MIOperandInfo
  14. [LLVMdev] Predicates and conditional execution
  15. [LLVMdev] AsmPrinter vs. MCAsmStreamer
  16. [LLVMdev] Questions of instruction target description of MSP430
  17. [LLVMdev] How to bind a register variable with a given general purpose register? FP_ONE
  18. [LLVMdev] The nsw story: part 1
  19. [LLVMdev] The nsw story: part 2
  20. [LLVMdev] The nsw story: part 3
  21. [LLVMdev] TargetExternalSymbol and TargetGlobalAddress
  22. [LLVMdev] trig language-like code generator generator (A brief description of LLVM instruction selection, although the post is quite old (2005).

• Libraries.

  1. STLPort: A port of the original STL to many platforms. Derived from the SGI implementation.
  2. Microsoft Predefined Macros

• Memo

  1. llvm/lib/Target/ISDOpcodes.h. The target-independent operators for a SelectionDAG are defined here.
  2. llvm/include/llvm/CodeGen/SelectionDAGNodes.h. SDNode class and derived classes are defined here.
  3. TokenFactor Node This node takes multiple tokens as input and produces a single token result. This is used to represent the fact that the operand operators are independent of each other.
  4. llvm/utils/TableGen/CodeGenInstruction.h/cpp. Instruction generated by tablegen.

• Questions:

  1. What's the functionality of TokenFactor Node (except grouping Loads and Exports)? How does it interact with instruction scheduling, register allocating and alias analysis?