1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
//! LLVM diagnostic reports.

pub use self::Diagnostic::*;
pub use self::OptimizationDiagnosticKind::*;

use crate::value::Value;
use libc::c_uint;

use super::{DiagnosticInfo, SMDiagnostic};
use rustc_span::InnerSpan;

#[derive(Copy, Clone)]
pub enum OptimizationDiagnosticKind {
    OptimizationRemark,
    OptimizationMissed,
    OptimizationAnalysis,
    OptimizationAnalysisFPCommute,
    OptimizationAnalysisAliasing,
    OptimizationFailure,
    OptimizationRemarkOther,
}

pub struct OptimizationDiagnostic<'ll> {
    pub kind: OptimizationDiagnosticKind,
    pub pass_name: String,
    pub function: &'ll Value,
    pub line: c_uint,
    pub column: c_uint,
    pub filename: String,
    pub message: String,
}

impl<'ll> OptimizationDiagnostic<'ll> {
    unsafe fn unpack(kind: OptimizationDiagnosticKind, di: &'ll DiagnosticInfo) -> Self {
        let mut function = None;
        let mut line = 0;
        let mut column = 0;

        let mut message = None;
        let mut filename = None;
        let pass_name = super::build_string(|pass_name| {
            message = super::build_string(|message| {
                filename = super::build_string(|filename| {
                    super::LLVMRustUnpackOptimizationDiagnostic(
                        di,
                        pass_name,
                        &mut function,
                        &mut line,
                        &mut column,
                        filename,
                        message,
                    )
                })
                .ok()
            })
            .ok()
        })
        .ok();

        let mut filename = filename.unwrap_or_default();
        if filename.is_empty() {
            filename.push_str("<unknown file>");
        }

        OptimizationDiagnostic {
            kind,
            pass_name: pass_name.expect("got a non-UTF8 pass name from LLVM"),
            function: function.unwrap(),
            line,
            column,
            filename,
            message: message.expect("got a non-UTF8 OptimizationDiagnostic message from LLVM"),
        }
    }
}

pub struct SrcMgrDiagnostic {
    pub level: super::DiagnosticLevel,
    pub message: String,
    pub source: Option<(String, Vec<InnerSpan>)>,
}

impl SrcMgrDiagnostic {
    pub unsafe fn unpack(diag: &SMDiagnostic) -> SrcMgrDiagnostic {
        // Recover the post-substitution assembly code from LLVM for better
        // diagnostics.
        let mut have_source = false;
        let mut buffer = String::new();
        let mut level = super::DiagnosticLevel::Error;
        let mut loc = 0;
        let mut ranges = [0; 8];
        let mut num_ranges = ranges.len() / 2;
        let message = super::build_string(|message| {
            buffer = super::build_string(|buffer| {
                have_source = super::LLVMRustUnpackSMDiagnostic(
                    diag,
                    message,
                    buffer,
                    &mut level,
                    &mut loc,
                    ranges.as_mut_ptr(),
                    &mut num_ranges,
                );
            })
            .expect("non-UTF8 inline asm");
        })
        .expect("non-UTF8 SMDiagnostic");

        SrcMgrDiagnostic {
            message,
            level,
            source: have_source.then(|| {
                let mut spans = vec![InnerSpan::new(loc as usize, loc as usize)];
                for i in 0..num_ranges {
                    spans.push(InnerSpan::new(ranges[i * 2] as usize, ranges[i * 2 + 1] as usize));
                }
                (buffer, spans)
            }),
        }
    }
}

#[derive(Clone)]
pub struct InlineAsmDiagnostic {
    pub level: super::DiagnosticLevel,
    pub cookie: c_uint,
    pub message: String,
    pub source: Option<(String, Vec<InnerSpan>)>,
}

impl InlineAsmDiagnostic {
    unsafe fn unpackInlineAsm(di: &DiagnosticInfo) -> Self {
        let mut cookie = 0;
        let mut message = None;
        let mut level = super::DiagnosticLevel::Error;

        super::LLVMRustUnpackInlineAsmDiagnostic(di, &mut level, &mut cookie, &mut message);

        InlineAsmDiagnostic {
            level,
            cookie,
            message: super::twine_to_string(message.unwrap()),
            source: None,
        }
    }

    unsafe fn unpackSrcMgr(di: &DiagnosticInfo) -> Self {
        let mut cookie = 0;
        let smdiag = SrcMgrDiagnostic::unpack(super::LLVMRustGetSMDiagnostic(di, &mut cookie));
        InlineAsmDiagnostic {
            level: smdiag.level,
            cookie,
            message: smdiag.message,
            source: smdiag.source,
        }
    }
}

pub enum Diagnostic<'ll> {
    Optimization(OptimizationDiagnostic<'ll>),
    InlineAsm(InlineAsmDiagnostic),
    PGO(&'ll DiagnosticInfo),
    Linker(&'ll DiagnosticInfo),
    Unsupported(&'ll DiagnosticInfo),

    /// LLVM has other types that we do not wrap here.
    UnknownDiagnostic(&'ll DiagnosticInfo),
}

impl<'ll> Diagnostic<'ll> {
    pub unsafe fn unpack(di: &'ll DiagnosticInfo) -> Self {
        use super::DiagnosticKind as Dk;
        let kind = super::LLVMRustGetDiagInfoKind(di);

        match kind {
            Dk::InlineAsm => InlineAsm(InlineAsmDiagnostic::unpackInlineAsm(di)),

            Dk::OptimizationRemark => {
                Optimization(OptimizationDiagnostic::unpack(OptimizationRemark, di))
            }
            Dk::OptimizationRemarkOther => {
                Optimization(OptimizationDiagnostic::unpack(OptimizationRemarkOther, di))
            }
            Dk::OptimizationRemarkMissed => {
                Optimization(OptimizationDiagnostic::unpack(OptimizationMissed, di))
            }

            Dk::OptimizationRemarkAnalysis => {
                Optimization(OptimizationDiagnostic::unpack(OptimizationAnalysis, di))
            }

            Dk::OptimizationRemarkAnalysisFPCommute => {
                Optimization(OptimizationDiagnostic::unpack(OptimizationAnalysisFPCommute, di))
            }

            Dk::OptimizationRemarkAnalysisAliasing => {
                Optimization(OptimizationDiagnostic::unpack(OptimizationAnalysisAliasing, di))
            }

            Dk::OptimizationFailure => {
                Optimization(OptimizationDiagnostic::unpack(OptimizationFailure, di))
            }

            Dk::PGOProfile => PGO(di),
            Dk::Linker => Linker(di),
            Dk::Unsupported => Unsupported(di),

            Dk::SrcMgr => InlineAsm(InlineAsmDiagnostic::unpackSrcMgr(di)),

            _ => UnknownDiagnostic(di),
        }
    }
}