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1# Paoc
2## Overview
3  `Paoc` is an application to launch compiler on [panda binary files](../../docs/file_format.md).
4  There are four [modes](#--paoc-mode) of `paoc`:
5  1. `AOT-mode` (default) - compile the files using Ark AOT Compiler and produce an executable;
6  1. `LLVM-mode` - compile the files using LLVM AOT Compiler and produce an executable;
7  1. `JIT-mode` - only run compiler (IR builder, optimizations) without generating an executable. This may be usefull, for example, to get `--compiler-dump` or to ensure that all of the compiler passes are applied correctly;
8  1. `OSR-mode` - similiar to `JIT-mode`. Takes into account differences of [OSR](../../docs/on-stack-replacement.md#Compilation) compilation.
9
10## Paoc options
11
12All compiler options are applicable, e. g. `--compiler-regex`, `--compiler-non-optimizing` or `--compiler-cross-arch`. Run `paoc` without any arguments to see full list of available options.
13
14### Common options
15
16#### `--paoc-panda-files`
17
18- Comma-separated list of panda files to compile.
19  This is a mandatory option.
20
21#### `--compiler-ignore-failures`
22
23- A boolean option that allows to continue the compilation if some of the methods are failed to compile.
24Default is `true`.
25
26#### `--paoc-mode`
27
28- A string that specifies paoc's mode.
29Possible values:
30  - `aot` (default)
31  - `llvm`
32  - `jit`
33  - `osr`
34
35### AOT-specific options
36
37#### `--paoc-output`
38
39- Output file path.
40Default is `out.an`.
41
42#### `--paoc-location`
43
44- Location path of the input panda file, that will be written into the AOT file.
45
46#### `--paoc-generate-symbols`
47
48- Generate symbols for compiled methods (always true in debug builds).
49Default is `false`.
50
51### Selection options
52
53The following options allow to specify methods to compile.
54If none of them are specified, `paoc` will compile every method from [--paoc-panda-files](#`--paoc-panda-files`).
55
56#### `--paoc-methods-from-file`
57
58- Path to a file which contains full names of methods to compile.
59
60#### `--paoc-skip-until`
61
62- Set first method to complie and skip all previous.
63
64#### `--paoc-compile-until`
65
66- Set last method to complie and skip all following.
67
68### Cluster compiler options
69
70`paoc` has an option to apply clusters of special compiler options (different from default and passed via command line) to specified methods:
71
72#### `--paoc-clusters`
73
74- A path to `.json` config file of the following format:
75
76```bash
77{
78    # The file should contain two objects: "clusters_map", which describes `function-clusters` relations,
79    # and "compiler_options", which defines clusters themselves (`option:argument` pairs).
80
81    "clusters_map" :
82    # Keys are functions' full names (i.e. `class::method`).
83    # Values are arrays whose elements should be a name of a cluster or it's index (starting from 0).
84    # If some of the options are intersecting, the last (in the array) would be applied.
85    {
86        "class::function_1" : [1],
87        "class::function_2" : [0, "cluster_1", 2],
88        "class::function_3" : ["cluster_0", 1, 2],     # same as previous
89        "class::function_4" : ["cluster_0", 2, 3]      # "cluster_3" overlaps "cluster_2" by "compiler_option_2".
90    },
91
92
93    "compiler_options" :
94    # Keys are clusters' names.
95    # Values are objects with `"option": argument` elements.
96    {
97        # [0]
98        "cluster_0" :
99        {
100            "compiler_option_1" : "arg",
101            "compiler_option_2" : "arg",
102            "compiler_option_3" : "arg"
103        },
104
105        # [1]
106        "cluster_1" :
107        {
108            "compiler_option_1" : "arg"
109        },
110
111        # [2]
112        "cluster_2" :
113        {
114            "compiler_option_1" : "arg",
115            "compiler_option_2" : "arg"
116        },
117
118        # [3]
119        "cluster_3" :
120        {
121            "compiler_option_2" : "arg"
122        }
123    }
124}
125```
126
127## Links
128
129### Source code
130
131[paoc.cpp](../tools/paoc/paoc.cpp)
132[paoc.yaml](../tools/paoc/paoc.yaml)
133[paoc_clusters.h](../tools/paoc/paoc_clusters.h)
134