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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 three [modes](#--paoc-mode) of `paoc`:
5  1. `AOT-mode` (default) - compile the files and produce an executable;
6  2. `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.
7  3. `OSR-mode` - similiar to `JIT-mode`. Takes into account differences of [OSR](../../docs/on-stack-replacement.md#Compilation) compilation.
8
9## Paoc options
10
11### Common options
12
13#### `--paoc-panda-files`
14
15- Comma-separated list of panda files to compile.
16  This is a mandatory option.
17
18#### `--compiler-ignore-failures`
19
20- A boolean option that allows to continue the compilation if some of the methods are failed to compile.
21Default is `true`.
22
23#### `--paoc-mode`
24
25- A string that specifies paoc's mode.
26Possible values:
27  - `aot` (default)
28  - `jit`
29  - `osr`
30
31### AOT-specific options
32
33#### `--paoc-output`
34
35- Output file path.
36Default is `out.an`.
37
38#### `--paoc-arch`
39
40- Target architecture for output file.
41Possible values:
42  - `arm`
43  - `arm64` (default)
44  - `x86`
45  - `x86_64`
46
47#### `--paoc-location`
48
49- Location path of the input panda file, that will be written into the AOT file.
50
51#### `--paoc-generate-symbols`
52
53- Generate symbols for compiled methods (always true in debug builds).
54Default is `false`.
55
56### Selection options
57
58The following options allow to specify methods to compile.
59If none of them are specified, `paoc` will compile every method from [--paoc-panda-files](#`--paoc-panda-files`).
60
61#### `--paoc-methods-from-file`
62
63- Path to a file which contains full names of methods to compile.
64
65#### `--paoc-skip-until`
66
67- Set first method to complie and skip all previous.
68
69#### `--paoc-compile-until`
70
71- Set last method to complie and skip all following.
72
73### Cluster compiler options
74
75`paoc` has an option to apply clusters of special compiler options (different from default and passed via command line) to specified methods:
76
77#### `--paoc-clusters`
78
79- A path to `.json` config file of the following format:
80
81```bash
82{
83    # The file should contain two objects: "clusters_map", which describes `function-clusters` relations,
84    # and "compiler_options", which defines clusters themselves (`option:argument` pairs).
85
86    "clusters_map" :
87    # Keys are functions' full names (i.e. `class::method`).
88    # Values are arrays whose elements should be a name of a cluster or it's index (starting from 0).
89    # If some of the options are intersecting, the last (in the array) would be applied.
90    {
91        "class::function_1" : [1],
92        "class::function_2" : [0, "cluster_1", 2],
93        "class::function_3" : ["cluster_0", 1, 2],     # same as previous
94        "class::function_4" : ["cluster_0", 2, 3]      # "cluster_3" overlaps "cluster_2" by "compiler_option_2".
95    },
96
97
98    "compiler_options" :
99    # Keys are clusters' names.
100    # Values are objects with `"option": argument` elements.
101    {
102        # [0]
103        "cluster_0" :
104        {
105            "compiler_option_1" : "arg",
106            "compiler_option_2" : "arg",
107            "compiler_option_3" : "arg"
108        },
109
110        # [1]
111        "cluster_1" :
112        {
113            "compiler_option_1" : "arg"
114        },
115
116        # [2]
117        "cluster_2" :
118        {
119            "compiler_option_1" : "arg",
120            "compiler_option_2" : "arg"
121        },
122
123        # [3]
124        "cluster_3" :
125        {
126            "compiler_option_2" : "arg"
127        }
128    }
129}
130```
131
132## Links
133
134### Source code
135
136[paoc.cpp](../tools/paoc/paoc.cpp)
137[paoc.yaml](../tools/paoc/paoc.yaml)
138[paoc_clusters.h](../tools/paoc/paoc_clusters.h)
139