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---
pretty_name:
- ComBack
language:
- C++/C
pipeline_tag: Compiler Backend
tags:
- C++/C Code
- Compiler Backend
license: "CC-BY-4.0"
configs:
- config_name: Statement-Level Completion
data_files: "./Code_Completion/Statement_Level/*.jsonl"
data_files: "./New_Target_Completion/statement_level/Existing_Types/*.jsonl"
data_files: "./New_Target_Completion/statement_level/New_Types/*.jsonl"
data_files: "./Iterative_Expansion_Completion/statement_level/*.jsonl"
- config_name: Next-Statement Suggestion
data_files: "./Code_Completion/Next_Statement_Level/*.jsonl"
data_files: "./New_Target_Completion/next_statement/Existing_Types/*.jsonl"
data_files: "./New_Target_Completion/next_statement/New_Types/*.jsonl"
data_files: "./Iterative_Expansion_Completion/next_statement/*.jsonl"
- config_name: Code Generation
data_files: "./Code_Generation/*.jsonl"
data_files: "./New_Target_Generation/Existing_Types/*.jsonl"
data_files: "./New_Target_Generation/New_Types/*.jsonl"
data_files: "./Iterative_Expansion_Generation/*.jsonl"
---
# ComBack: A Versatile Dataset for Enhancing Compiler Backend Development Efficiency
ComBack is a large-scale multi-platform compiler backend code dataset.
ComBack is sourced from GCC and LLVM backends corresponding to 178 target platforms.
- language:
- pretty_name: "ComBack"
- license: CC-BY-4.0
## Dataset Information
- Source Data
- GCC
| Category | Target Platform | Function | KLoC |
| ---- | ---- | ---- | ---- |
| CPU | 30 | 35,147 | 647.2 |
| MPU | 33 | 6,010 | 183.9 |
| GPU | 2 | 457 | 11.2 |
| VLIW | 5 | 959 | 25.4 |
| DSP | 3 | 399 | 9.6 |
| Virtual | 4 | 327 | 6.5 |
| **SUM** | **77** | **43,299** | **883.7** |
- LLVM
| Category | Target Platform | Function | KLoC |
| ---- | ---- | ---- | ---- |
| CPU | 43 | 84,914 | 3,450.4 |
| MPU | 30 | 11,311 | 173.0 |
| GPU | 5 | 22,591 | 768.3 |
| VLIW | 4 | 2,048 | 24.3 |
| DSP | 7 | 9,646 | 263.2 |
| Virtual | 12 | 8,430 | 168.3 |
| **SUM** | **101** | **138,940** | **4,847.5** |
- Tasks
- Statement-Level Completion: complete current statement.
```c++
//Inputs:
...
adjustReg(MBB,LastFrameDestroy, DL, SPReg, FPReg, -StackSize+RVFI->getVarArgsSaveSize()
//Ground Truth:
MachineInstr::FrameDestroy);
```
- Next-Statement Suggestion: predict the next statement.
```c++
//Inputs:
...
maxCallFrameSize = (maxCallFrameSize + AlignMask) & ~AlignMask;
//Ground Truth:
MFI -> setMaxCallFrameSize(maxCallFrameSize);
```
- Code Generation: generate a function with function description in natrual language.
```c++
//Inputs:
getPointerRegClass: Returns a TargetRegisterClass used for pointer values.
Target-Specific Value: Sparc, SP::I64RegsRegClass, SP::IntRegsRegClass.
//Ground Truth:
TargetRegisterClass *SparcRegisterInfo::getPointerRegClass(MachineFunction &MF ,unsigned Kind) {
return Subtarget.is64Bit() ? &SP::I64RegsRegClass : &SP::IntRegsRegClass;
}
```
## Organization
- `Code_Generation/*` and `Code_Completion/*`: **split data of 178 backends into train/valid/test set in the ratio of 80%:10%:10%**
| Task | Train | Valid | Test |
| ---- | ---- | ---- | ---- |
| Statement-Level Comp. | 128,899(11.36M Token) | 16,112(1.43M Token) | 16,113(1.43M Token) |
| Next-Statement Sugg. | 173,052(15.69M Token) | 21,631(1.99M Token) | 21,632(1.98M Token) |
| Code Generation. | 36,236(5.10M Token) | 4,530(0.64M Token) | 4,530(0.64M Token) |
- `New_Target_Generation/Existing_Types/*` and `New_Target_Completion/Existing_Types/*`: **Take data of RISC-V,ARC,NVPTX both in GCC and LLVM as test set, split train/valid set in the ratio of 85%:15% of other CPU, MPU and GPU targets excluding RI5CY(RI5CY is custmoized based on RISCV)**
| Task | Train | Valid | Test |
| ---- | ---- | ---- | ---- |
| Statement-Level Comp. | 114,016(10.20M Token) | 20,121(1.81M Token) | 6,645(0.58M Token) |
| Next-Statement Sugg. | 152,114(14.10M Token) | 26,844(2.49M Token) | 9,313(0.83M Token) |
| Code Generation. | 30,633(4.44M Token) | 5,406(0.79M Token) | 2,819(0.37M Token) |
- `New_Target_Generation/New_Types/*` and `New_Target_Completion/New_Types/*`: **Take data of ARC,NVPTX both in GCC and LLVM as test set, split train/valid set in the ratio of 85%:15% of other CPU targets excluding RI5CY(RI5CY is custmoized based on RISCV)**
| Task | Train | Valid | Test |
| ---- | ---- | ---- | ---- |
| Statement-Level Comp. | 87,018(7.78M Token) | 15,357(1.37M Token) | 2,764(0.26M Token) |
| Next-Statement Sugg. | 113,684(10.65M Token) | 20,063(1.87M Token) | 4,029(0.38M Token) |
| Code Generation. | 21,184(3.14M Token) | 3,739(0.55M Token) | 1,372(0.18M Token) |
- `Iterative_Expansion_Generation/*` and `Iterative_Expansion_Completion/*`: **Take data of RI5CY in LLVM as test set, split train/valid set in the ratio of 85%:15% of other CPU targets excluding RISC-V(a) and including RISC-V(b)**
##### (a)
| Task | Train | Valid | Test |
| ---- | ---- | ---- | ---- |
| Statement-Level Comp. | 87,018(7.78M Token) | 15,357(1.37M Token) | 721(0.04M Token) |
| Next-Statement Sugg. | 113,684(10.65M Token) | 20,063(1.87M Token) | 1,035(0.06M Token) |
| Code Generation. | 21,184(3.14M Token) | 3,739(0.55M Token) | 219(0.02M Token) |
##### (b)
| Task | Train | Valid | Test |
| ---- | ---- | ---- | ---- |
| Statement-Level Comp. | 90,316(8.06M Token) | 15,940(1.42M Token) | 721(0.04M Token) |
| Next-Statement Sugg. | 118,175(11.04M Token) | 20,856(1.94M Token) | 1,035(0.06M Token) |
| Code Generation. | 22,413(3.30M Token) | 3,957(0.58M Token) | 219(0.02M Token) | |