To protect your data, the CISO officer has suggested users to enable GitLab 2FA as soon as possible.

mod.rs 17.6 KB
Newer Older
qinsoon's avatar
qinsoon committed
1
2
#![allow(dead_code)]

qinsoon's avatar
qinsoon committed
3
/// Tree pattern matching instruction selection.
4
5
6
pub mod inst_sel;

mod codegen;
qinsoon's avatar
qinsoon committed
7
8
9
/// CodeGenerator trait serves as an interface to the backend code generator, which
/// may generate assembly code or binary (not implemented yet)
use compiler::backend::x86_64::codegen::CodeGenerator;
10

qinsoon's avatar
qinsoon committed
11
12
13
14
15
16
/// assembly backend as AOT compiler
mod asm_backend;
use compiler::backend::x86_64::asm_backend::ASMCodeGen;

// re-export a few functions for AOT compilation
#[cfg(feature = "aot")]
17
pub use compiler::backend::x86_64::asm_backend::emit_code;
qinsoon's avatar
qinsoon committed
18
#[cfg(feature = "aot")]
19
pub use compiler::backend::x86_64::asm_backend::emit_context;
qinsoon's avatar
qinsoon committed
20
#[cfg(feature = "aot")]
qinsoon's avatar
qinsoon committed
21
pub use compiler::backend::x86_64::asm_backend::emit_context_with_reloc;
22
23
#[cfg(feature = "aot")]
pub use compiler::backend::x86_64::asm_backend::spill_rewrite;
24
25
26

use ast::ptr::P;
use ast::ir::*;
qinsoon's avatar
qinsoon committed
27
use ast::types::*;
qinsoon's avatar
qinsoon committed
28
use compiler::backend::RegGroup;
qinsoon's avatar
qinsoon committed
29

30
use utils::LinkedHashMap;
31
32
use std::collections::HashMap;

qinsoon's avatar
qinsoon committed
33
/// a macro to declare a set of general purpose registers that are aliased to the first one
qinsoon's avatar
qinsoon committed
34
macro_rules! GPR_ALIAS {
qinsoon's avatar
qinsoon committed
35
36
37
38
39
40
41
42
43
44
45
46
    ($alias: ident: ($id64: expr, $r64: ident) -> $r32: ident, $r16: ident, $r8l: ident, $r8h: ident) => {
        lazy_static!{
            pub static ref $r64 : P<Value> = GPR!($id64,    stringify!($r64), UINT64_TYPE);
            pub static ref $r32 : P<Value> = GPR!($id64 +1, stringify!($r32), UINT32_TYPE);
            pub static ref $r16 : P<Value> = GPR!($id64 +2, stringify!($r16), UINT16_TYPE);
            pub static ref $r8l : P<Value> = GPR!($id64 +3, stringify!($r8l), UINT8_TYPE);
            pub static ref $r8h : P<Value> = GPR!($id64 +4, stringify!($r8h), UINT8_TYPE);

            pub static ref $alias : [P<Value>; 5] = [$r64.clone(), $r32.clone(), $r16.clone(), $r8l.clone(), $r8h.clone()];
        }
    };

qinsoon's avatar
qinsoon committed
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
    ($alias: ident: ($id64: expr, $r64: ident) -> $r32: ident, $r16: ident, $r8: ident) => {
        lazy_static!{
            pub static ref $r64 : P<Value> = GPR!($id64,    stringify!($r64), UINT64_TYPE);
            pub static ref $r32 : P<Value> = GPR!($id64 +1, stringify!($r32), UINT32_TYPE);
            pub static ref $r16 : P<Value> = GPR!($id64 +2, stringify!($r16), UINT16_TYPE);
            pub static ref $r8  : P<Value> = GPR!($id64 +3, stringify!($r8) , UINT8_TYPE );

            pub static ref $alias : [P<Value>; 4] = [$r64.clone(), $r32.clone(), $r16.clone(), $r8.clone()];
        }
    };

    ($alias: ident: ($id64: expr, $r64: ident)) => {
        lazy_static!{
            pub static ref $r64 : P<Value> = GPR!($id64,    stringify!($r64), UINT64_TYPE);

            pub static ref $alias : [P<Value>; 4] = [$r64.clone(), $r64.clone(), $r64.clone(), $r64.clone()];
        }
    };
}

qinsoon's avatar
qinsoon committed
67
/// a macro to declare a general purpose register
68
macro_rules! GPR {
qinsoon's avatar
qinsoon committed
69
    ($id:expr, $name: expr, $ty: ident) => {
qinsoon's avatar
qinsoon committed
70
71
        {
            P(Value {
qinsoon's avatar
qinsoon committed
72
                hdr: MuEntityHeader::named($id, $name.to_string()),
qinsoon's avatar
qinsoon committed
73
                ty: $ty.clone(),
qinsoon's avatar
qinsoon committed
74
                v: Value_::SSAVar($id)
qinsoon's avatar
qinsoon committed
75
76
            })
        }
qinsoon's avatar
qinsoon committed
77
78
79
    };
}

qinsoon's avatar
qinsoon committed
80
/// a macro to declare a floating point register
qinsoon's avatar
qinsoon committed
81
macro_rules! FPR {
qinsoon's avatar
qinsoon committed
82
    ($id:expr, $name: expr) => {
qinsoon's avatar
qinsoon committed
83
84
        {
            P(Value {
qinsoon's avatar
qinsoon committed
85
                hdr: MuEntityHeader::named($id, $name.to_string()),
qinsoon's avatar
qinsoon committed
86
                ty: DOUBLE_TYPE.clone(),
qinsoon's avatar
qinsoon committed
87
                v: Value_::SSAVar($id)
qinsoon's avatar
qinsoon committed
88
89
            })
        }
qinsoon's avatar
qinsoon committed
90
91
92
    };
}

qinsoon's avatar
qinsoon committed
93
94
95
// declare all general purpose registers for x86_64
// non 64-bit registers are alias of its 64-bit one

96
97
GPR_ALIAS!(RAX_ALIAS: (0, RAX)  -> EAX, AX , AL, AH);
GPR_ALIAS!(RCX_ALIAS: (5, RCX)  -> ECX, CX , CL, CH);
98
GPR_ALIAS!(RDX_ALIAS: (10,RDX)  -> EDX, DX , DL, DH);
99
100
101
102
103
104
105
106
107
108
109
110
111
112
GPR_ALIAS!(RBX_ALIAS: (15,RBX)  -> EBX, BX , BL, BH);
GPR_ALIAS!(RSP_ALIAS: (20,RSP)  -> ESP, SP , SPL);
GPR_ALIAS!(RBP_ALIAS: (24,RBP)  -> EBP, BP , BPL);
GPR_ALIAS!(RSI_ALIAS: (28,RSI)  -> ESI, SI , SIL);
GPR_ALIAS!(RDI_ALIAS: (32,RDI)  -> EDI, DI , DIL);
GPR_ALIAS!(R8_ALIAS : (36,R8 )  -> R8D, R8W, R8B);
GPR_ALIAS!(R9_ALIAS : (40,R9 )  -> R9D, R9W, R9B);
GPR_ALIAS!(R10_ALIAS: (44,R10) -> R10D,R10W,R10B);
GPR_ALIAS!(R11_ALIAS: (48,R11) -> R11D,R11W,R11B);
GPR_ALIAS!(R12_ALIAS: (52,R12) -> R12D,R12W,R12B);
GPR_ALIAS!(R13_ALIAS: (56,R13) -> R13D,R13W,R13B);
GPR_ALIAS!(R14_ALIAS: (60,R14) -> R14D,R14W,R14B);
GPR_ALIAS!(R15_ALIAS: (64,R15) -> R15D,R15W,R15B);
GPR_ALIAS!(RIP_ALIAS: (68,RIP));
qinsoon's avatar
qinsoon committed
113

qinsoon's avatar
qinsoon committed
114
lazy_static! {
qinsoon's avatar
qinsoon committed
115
116
    /// a map from 64-bit register IDs to a vector of its aliased register (Values),
    /// including the 64-bit register
117
118
    pub static ref GPR_ALIAS_TABLE : LinkedHashMap<MuID, Vec<P<Value>>> = {
        let mut ret = LinkedHashMap::new();
qinsoon's avatar
qinsoon committed
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140

        ret.insert(RAX.id(), RAX_ALIAS.to_vec());
        ret.insert(RCX.id(), RCX_ALIAS.to_vec());
        ret.insert(RDX.id(), RDX_ALIAS.to_vec());
        ret.insert(RBX.id(), RBX_ALIAS.to_vec());
        ret.insert(RSP.id(), RSP_ALIAS.to_vec());
        ret.insert(RBP.id(), RBP_ALIAS.to_vec());
        ret.insert(RSI.id(), RSI_ALIAS.to_vec());
        ret.insert(RDI.id(), RDI_ALIAS.to_vec());
        ret.insert(R8.id() , R8_ALIAS.to_vec() );
        ret.insert(R9.id() , R9_ALIAS.to_vec() );
        ret.insert(R10.id(), R10_ALIAS.to_vec());
        ret.insert(R11.id(), R11_ALIAS.to_vec());
        ret.insert(R12.id(), R12_ALIAS.to_vec());
        ret.insert(R13.id(), R13_ALIAS.to_vec());
        ret.insert(R14.id(), R14_ALIAS.to_vec());
        ret.insert(R15.id(), R15_ALIAS.to_vec());
        ret.insert(RIP.id(), RIP_ALIAS.to_vec());

        ret
    };

qinsoon's avatar
qinsoon committed
141
    /// a map from any register to its 64-bit alias
qinsoon's avatar
qinsoon committed
142
143
144
145
146
147
148
149
150
151
152
153
    pub static ref GPR_ALIAS_LOOKUP : HashMap<MuID, P<Value>> = {
        let mut ret = HashMap::new();

        for vec in GPR_ALIAS_TABLE.values() {
            let colorable = vec[0].clone();

            for gpr in vec {
                ret.insert(gpr.id(), colorable.clone());
            }
        }

        ret
qinsoon's avatar
qinsoon committed
154
    };
qinsoon's avatar
qinsoon committed
155
156
}

qinsoon's avatar
qinsoon committed
157
158
/// returns P<Value> for a register ID of its alias of the given length
/// panics if the ID is not a machine register ID
qinsoon's avatar
qinsoon committed
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
pub fn get_alias_for_length(id: MuID, length: usize) -> P<Value> {
    if id < FPR_ID_START {
        let vec = match GPR_ALIAS_TABLE.get(&id) {
            Some(vec) => vec,
            None => panic!("didnt find {} as GPR", id)
        };

        match length {
            64 => vec[0].clone(),
            32 => vec[1].clone(),
            16 => vec[2].clone(),
            8 => vec[3].clone(),
            1 => vec[3].clone(),
            _ => panic!("unexpected length {} for {}", length, vec[0])
        }
    } else {
qinsoon's avatar
qinsoon committed
175
        for r in ALL_FPRS.iter() {
qinsoon's avatar
qinsoon committed
176
177
178
179
180
181
182
183
            if r.id() == id {
                return r.clone();
            }
        }

        panic!("didnt find {} as FPR", id)
    }
}
qinsoon's avatar
qinsoon committed
184

qinsoon's avatar
qinsoon committed
185
/// are two registers aliased? (both must be machine register IDs, otherwise this function panics)
186
pub fn is_aliased(id1: MuID, id2: MuID) -> bool {
qinsoon's avatar
qinsoon committed
187
    if get_color_for_precolored(id1) == get_color_for_precolored(id2) {
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
        // we need to specially check the case for AH/BH/CH/DH
        // because both AH and AL are aliased to RAX, but AH and AL are not aliased
        macro_rules! is_match {
            ($a1: expr, $a2: expr; $b: expr) => {
                $a1 == $b.id() || $a2 == $b.id()
            }
        };

        if is_match!(id1, id2; AH) {
            return false;
        } else if is_match!(id1, id2; BH) {
            return false;
        } else if is_match!(id1, id2; CH) {
            return false;
        } else if is_match!(id1, id2; DH) {
            return false;
        } else {
            return true;
        }
207
    } else {
qinsoon's avatar
qinsoon committed
208
        false
209
210
211
    }
}

qinsoon's avatar
mod.rs    
qinsoon committed
212
/// gets the color for a machine register (returns 64-bit alias for it)
qinsoon's avatar
qinsoon committed
213
214
215
pub fn get_color_for_precolored(id: MuID) -> MuID {
    debug_assert!(id < MACHINE_ID_END);

qinsoon's avatar
qinsoon committed
216
217
218
219
220
221
222
223
    if id < FPR_ID_START {
        match GPR_ALIAS_LOOKUP.get(&id) {
            Some(val) => val.id(),
            None => panic!("cannot find GPR {}", id)
        }
    } else {
        // we do not have alias for FPRs
        id
qinsoon's avatar
qinsoon committed
224
225
    }
}
qinsoon's avatar
qinsoon committed
226

qinsoon's avatar
mod.rs    
qinsoon committed
227
/// returns register length (in bits) for an integer operand
qinsoon's avatar
qinsoon committed
228
229
230
231
232
233
234
235
#[inline(always)]
pub fn check_op_len(op: &P<Value>) -> usize {
    match op.ty.get_int_length() {
        Some(64) => 64,
        Some(32) => 32,
        Some(16) => 16,
        Some(8)  => 8,
        Some(1)  => 8,
qinsoon's avatar
mod.rs    
qinsoon committed
236
        _ => panic!("unsupported register length for x64: {}", op.ty)
qinsoon's avatar
qinsoon committed
237
238
239
    }
}

qinsoon's avatar
qinsoon committed
240
lazy_static! {
qinsoon's avatar
mod.rs    
qinsoon committed
241
242
    /// GPRs for returning values
    //  order matters
qinsoon's avatar
qinsoon committed
243
    pub static ref RETURN_GPRS : [P<Value>; 2] = [
qinsoon's avatar
qinsoon committed
244
245
246
        RAX.clone(),
        RDX.clone(),
    ];
247

qinsoon's avatar
mod.rs    
qinsoon committed
248
249
    /// GPRs for passing arguments
    //  order matters
qinsoon's avatar
qinsoon committed
250
    pub static ref ARGUMENT_GPRS : [P<Value>; 6] = [
qinsoon's avatar
qinsoon committed
251
252
253
254
255
256
257
        RDI.clone(),
        RSI.clone(),
        RDX.clone(),
        RCX.clone(),
        R8.clone(),
        R9.clone()
    ];
258

qinsoon's avatar
mod.rs    
qinsoon committed
259
    /// callee saved GPRs
qinsoon's avatar
qinsoon committed
260
    pub static ref CALLEE_SAVED_GPRS : [P<Value>; 6] = [
qinsoon's avatar
qinsoon committed
261
262
263
264
265
266
267
        RBX.clone(),
        RBP.clone(),
        R12.clone(),
        R13.clone(),
        R14.clone(),
        R15.clone()
    ];
qinsoon's avatar
qinsoon committed
268

qinsoon's avatar
mod.rs    
qinsoon committed
269
    /// caller saved GPRs
qinsoon's avatar
qinsoon committed
270
    pub static ref CALLER_SAVED_GPRS : [P<Value>; 9] = [
qinsoon's avatar
qinsoon committed
271
272
273
274
275
276
277
278
279
280
        RAX.clone(),
        RCX.clone(),
        RDX.clone(),
        RSI.clone(),
        RDI.clone(),
        R8.clone(),
        R9.clone(),
        R10.clone(),
        R11.clone()
    ];
281

qinsoon's avatar
mod.rs    
qinsoon committed
282
283
    /// all the genral purpose registers
    //  FIXME: why RBP is commented out?
qinsoon's avatar
qinsoon committed
284
    static ref ALL_GPRS : [P<Value>; 15] = [
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
        RAX.clone(),
        RCX.clone(),
        RDX.clone(),
        RBX.clone(),
        RSP.clone(),
//        RBP.clone(),
        RSI.clone(),
        RDI.clone(),
        R8.clone(),
        R9.clone(),
        R10.clone(),
        R11.clone(),
        R12.clone(),
        R13.clone(),
        R14.clone(),
        R15.clone()
    ];
qinsoon's avatar
qinsoon committed
302
303
}

304
pub const FPR_ID_START : usize = 100;
qinsoon's avatar
qinsoon committed
305

qinsoon's avatar
qinsoon committed
306
lazy_static!{
qinsoon's avatar
mod.rs    
qinsoon committed
307
    // floating point registers, we use SSE registers
qinsoon's avatar
qinsoon committed
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
    pub static ref XMM0  : P<Value> = FPR!(FPR_ID_START,    "xmm0");
    pub static ref XMM1  : P<Value> = FPR!(FPR_ID_START + 1,"xmm1");
    pub static ref XMM2  : P<Value> = FPR!(FPR_ID_START + 2,"xmm2");
    pub static ref XMM3  : P<Value> = FPR!(FPR_ID_START + 3,"xmm3");
    pub static ref XMM4  : P<Value> = FPR!(FPR_ID_START + 4,"xmm4");
    pub static ref XMM5  : P<Value> = FPR!(FPR_ID_START + 5,"xmm5");
    pub static ref XMM6  : P<Value> = FPR!(FPR_ID_START + 6,"xmm6");
    pub static ref XMM7  : P<Value> = FPR!(FPR_ID_START + 7,"xmm7");
    pub static ref XMM8  : P<Value> = FPR!(FPR_ID_START + 8,"xmm8");
    pub static ref XMM9  : P<Value> = FPR!(FPR_ID_START + 9,"xmm9");
    pub static ref XMM10 : P<Value> = FPR!(FPR_ID_START + 10,"xmm10");
    pub static ref XMM11 : P<Value> = FPR!(FPR_ID_START + 11,"xmm11");
    pub static ref XMM12 : P<Value> = FPR!(FPR_ID_START + 12,"xmm12");
    pub static ref XMM13 : P<Value> = FPR!(FPR_ID_START + 13,"xmm13");
    pub static ref XMM14 : P<Value> = FPR!(FPR_ID_START + 14,"xmm14");
    pub static ref XMM15 : P<Value> = FPR!(FPR_ID_START + 15,"xmm15");
324

qinsoon's avatar
mod.rs    
qinsoon committed
325
326
    /// FPRs to return values
    //  order matters
qinsoon's avatar
qinsoon committed
327
    pub static ref RETURN_FPRS : [P<Value>; 2] = [
qinsoon's avatar
qinsoon committed
328
329
330
        XMM0.clone(),
        XMM1.clone()
    ];
331

qinsoon's avatar
mod.rs    
qinsoon committed
332
333
    /// FPRs to pass arguments
    //  order matters
qinsoon's avatar
qinsoon committed
334
    pub static ref ARGUMENT_FPRS : [P<Value>; 8] = [
qinsoon's avatar
qinsoon committed
335
336
        XMM0.clone(),
        XMM1.clone(),
qinsoon's avatar
qinsoon committed
337
338
339
340
341
342
343
        XMM2.clone(),
        XMM3.clone(),
        XMM4.clone(),
        XMM5.clone(),
        XMM6.clone(),
        XMM7.clone()
    ];
344

qinsoon's avatar
mod.rs    
qinsoon committed
345
    /// callee saved FPRs (none for x86_64)
qinsoon's avatar
qinsoon committed
346
    pub static ref CALLEE_SAVED_FPRS : [P<Value>; 0] = [];
qinsoon's avatar
qinsoon committed
347

qinsoon's avatar
mod.rs    
qinsoon committed
348
    /// caller saved FPRs
qinsoon's avatar
qinsoon committed
349
    pub static ref CALLER_SAVED_FPRS : [P<Value>; 16] = [
qinsoon's avatar
qinsoon committed
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
        XMM0.clone(),
        XMM1.clone(),
        XMM2.clone(),
        XMM3.clone(),
        XMM4.clone(),
        XMM5.clone(),
        XMM6.clone(),
        XMM7.clone(),
        XMM8.clone(),
        XMM9.clone(),
        XMM10.clone(),
        XMM11.clone(),
        XMM12.clone(),
        XMM13.clone(),
        XMM14.clone(),
        XMM15.clone(),
    ];
367

qinsoon's avatar
mod.rs    
qinsoon committed
368
    /// all the floating point registers
qinsoon's avatar
qinsoon committed
369
    static ref ALL_FPRS : [P<Value>; 16] = [
qinsoon's avatar
qinsoon committed
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
        XMM0.clone(),
        XMM1.clone(),
        XMM2.clone(),
        XMM3.clone(),
        XMM4.clone(),
        XMM5.clone(),
        XMM6.clone(),
        XMM7.clone(),
        XMM8.clone(),
        XMM9.clone(),
        XMM10.clone(),
        XMM11.clone(),
        XMM12.clone(),
        XMM13.clone(),
        XMM14.clone(),
        XMM15.clone(),
    ];
qinsoon's avatar
qinsoon committed
387
388
}

qinsoon's avatar
qinsoon committed
389
lazy_static! {
qinsoon's avatar
mod.rs    
qinsoon committed
390
    /// a map for all the machine registers, from ID to P<Value>
qinsoon's avatar
qinsoon committed
391
    pub static ref ALL_MACHINE_REGS : LinkedHashMap<MuID, P<Value>> = {
392
        let mut map = LinkedHashMap::new();
qinsoon's avatar
qinsoon committed
393
394
395
396
397
398
399

        for vec in GPR_ALIAS_TABLE.values() {
            for reg in vec {
                map.insert(reg.id(), reg.clone());
            }
        }

400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
        map.insert(XMM0.id(), XMM0.clone());
        map.insert(XMM1.id(), XMM1.clone());
        map.insert(XMM2.id(), XMM2.clone());
        map.insert(XMM3.id(), XMM3.clone());
        map.insert(XMM4.id(), XMM4.clone());
        map.insert(XMM5.id(), XMM5.clone());
        map.insert(XMM6.id(), XMM6.clone());
        map.insert(XMM7.id(), XMM7.clone());
        map.insert(XMM8.id(), XMM8.clone());
        map.insert(XMM9.id(), XMM9.clone());
        map.insert(XMM10.id(), XMM10.clone());
        map.insert(XMM11.id(), XMM11.clone());
        map.insert(XMM12.id(), XMM12.clone());
        map.insert(XMM13.id(), XMM13.clone());
        map.insert(XMM14.id(), XMM14.clone());
        map.insert(XMM15.id(), XMM15.clone());

        map
    };
419

qinsoon's avatar
mod.rs    
qinsoon committed
420
421
422
423
    /// all the usable registers for register allocators to assign
    //  order matters here (since register allocator will prioritize assigning temporaries
    //  to a register that appears early)
    //  we put caller saved regs first (they imposes no overhead if there is no call instruction)
qinsoon's avatar
qinsoon committed
424
    pub static ref ALL_USABLE_MACHINE_REGS : Vec<P<Value>> = vec![
qinsoon's avatar
mod.rs    
qinsoon committed
425
        // caller saved registers
426
427
428
429
430
431
432
433
434
        RAX.clone(),
        RCX.clone(),
        RDX.clone(),
        RSI.clone(),
        RDI.clone(),
        R8.clone(),
        R9.clone(),
        R10.clone(),
        R11.clone(),
qinsoon's avatar
mod.rs    
qinsoon committed
435
        // callee saved registers
436
437
438
439
440
        RBX.clone(),
        R12.clone(),
        R13.clone(),
        R14.clone(),
        R15.clone(),
qinsoon's avatar
mod.rs    
qinsoon committed
441
        // floating point registers
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
        XMM0.clone(),
        XMM1.clone(),
        XMM2.clone(),
        XMM3.clone(),
        XMM4.clone(),
        XMM5.clone(),
        XMM6.clone(),
        XMM7.clone(),
        XMM8.clone(),
        XMM9.clone(),
        XMM10.clone(),
        XMM11.clone(),
        XMM12.clone(),
        XMM13.clone(),
        XMM14.clone(),
        XMM15.clone()
    ];
qinsoon's avatar
qinsoon committed
459
460
}

qinsoon's avatar
mod.rs    
qinsoon committed
461
/// creates context for each machine register in FunctionContext
qinsoon's avatar
qinsoon committed
462
pub fn init_machine_regs_for_func (func_context: &mut FunctionContext) {
qinsoon's avatar
qinsoon committed
463
    for reg in ALL_MACHINE_REGS.values() {
qinsoon's avatar
qinsoon committed
464
        let reg_id = reg.extract_ssa_id().unwrap();
qinsoon's avatar
qinsoon committed
465
        let entry = SSAVarEntry::new(reg.clone());
466

qinsoon's avatar
qinsoon committed
467
468
469
470
        func_context.values.insert(reg_id, entry);
    }
}

qinsoon's avatar
mod.rs    
qinsoon committed
471
/// gets the number of registers in a certain register group
qinsoon's avatar
qinsoon committed
472
473
pub fn number_of_regs_in_group(group: RegGroup) -> usize {
    match group {
qinsoon's avatar
qinsoon committed
474
475
476
        RegGroup::GPR   => ALL_GPRS.len(),
        RegGroup::GPREX => ALL_GPRS.len(),
        RegGroup::FPR   => ALL_FPRS.len()
qinsoon's avatar
qinsoon committed
477
478
479
    }
}

qinsoon's avatar
mod.rs    
qinsoon committed
480
/// returns the number of all registers on this platform
qinsoon's avatar
qinsoon committed
481
pub fn number_of_all_regs() -> usize {
qinsoon's avatar
qinsoon committed
482
    ALL_MACHINE_REGS.len()
qinsoon's avatar
qinsoon committed
483
484
}

qinsoon's avatar
mod.rs    
qinsoon committed
485
/// returns a reference to a map for all the registers
486
pub fn all_regs() -> &'static LinkedHashMap<MuID, P<Value>> {
qinsoon's avatar
qinsoon committed
487
    &ALL_MACHINE_REGS
qinsoon's avatar
qinsoon committed
488
489
}

qinsoon's avatar
mod.rs    
qinsoon committed
490
/// returns a reference to a vector of all usable registers
491
pub fn all_usable_regs() -> &'static Vec<P<Value>> {
qinsoon's avatar
qinsoon committed
492
    &ALL_USABLE_MACHINE_REGS
493
494
}

qinsoon's avatar
mod.rs    
qinsoon committed
495
496
/// returns RegGroup for a given machine register (by ID)
/// panics if the ID is not a machine register
497
pub fn pick_group_for_reg(reg_id: MuID) -> RegGroup {
498
    let reg = all_regs().get(&reg_id).unwrap();
499
    RegGroup::get_from_value(reg)
500
501
}

qinsoon's avatar
mod.rs    
qinsoon committed
502
503
/// is a machine register (by ID) callee saved?
/// returns false if the ID is not a machine register
504
pub fn is_callee_saved(reg_id: MuID) -> bool {
qinsoon's avatar
qinsoon committed
505
    for reg in CALLEE_SAVED_GPRS.iter() {
506
507
508
509
        if reg_id == reg.extract_ssa_id().unwrap() {
            return true;
        }
    }
510
511

    false
512
513
}

qinsoon's avatar
mod.rs    
qinsoon committed
514
/// is a constant a valid x86_64 immediate number (32 bits integer)?
515
pub fn is_valid_x86_imm(op: &P<Value>) -> bool {
qinsoon's avatar
qinsoon committed
516
    use std::u32;
qinsoon's avatar
qinsoon committed
517
    match op.v {
qinsoon's avatar
qinsoon committed
518
        Value_::Constant(Constant::Int(val)) if val <= u32::MAX as u64 => {
qinsoon's avatar
qinsoon committed
519
520
            true
        },
521
522
        _ => false
    }
qinsoon's avatar
qinsoon committed
523
524
525
}

use ast::inst::*;
qinsoon's avatar
mod.rs    
qinsoon committed
526
527

/// estimate the number of machine instruction for each IR instruction
qinsoon's avatar
qinsoon committed
528
529
530
531
532
533
pub fn estimate_insts_for_ir(inst: &Instruction) -> usize {
    use ast::inst::Instruction_::*;

    match inst.v {
        // simple
        BinOp(_, _, _)  => 1,
qinsoon's avatar
qinsoon committed
534
        BinOpWithStatus(_, _, _, _) => 2,
qinsoon's avatar
qinsoon committed
535
        CmpOp(_, _, _)  => 1,
qinsoon's avatar
qinsoon committed
536
        ConvOp{..}      => 0,
qinsoon's avatar
qinsoon committed
537
538

        // control flow
qinsoon's avatar
qinsoon committed
539
540
541
        Branch1(_)     => 1,
        Branch2{..}    => 1,
        Select{..}     => 2,
qinsoon's avatar
qinsoon committed
542
        Watchpoint{..} => 1,
qinsoon's avatar
qinsoon committed
543
544
        WPBranch{..}   => 2,
        Switch{..}     => 3,
qinsoon's avatar
qinsoon committed
545
546
547

        // call
        ExprCall{..} | ExprCCall{..} | Call{..} | CCall{..} => 5,
qinsoon's avatar
qinsoon committed
548
        Return(_)   => 1,
qinsoon's avatar
qinsoon committed
549
550
551
552
        TailCall(_) => 1,

        // memory access
        Load{..} | Store{..} => 1,
qinsoon's avatar
qinsoon committed
553
554
555
556
557
        CmpXchg{..}          => 1,
        AtomicRMW{..}        => 1,
        AllocA(_)            => 1,
        AllocAHybrid(_, _)   => 1,
        Fence(_)             => 1,
qinsoon's avatar
qinsoon committed
558
559
560
561

        // memory addressing
        GetIRef(_) | GetFieldIRef{..} | GetElementIRef{..} | ShiftIRef{..} | GetVarPartIRef{..} => 0,

qinsoon's avatar
mod.rs    
qinsoon committed
562
        // runtime call
qinsoon's avatar
qinsoon committed
563
564
        New(_) | NewHybrid(_, _) => 10,
        NewStack(_) | NewThread(_, _) | NewThreadExn(_, _) | NewFrameCursor(_) => 10,
qinsoon's avatar
qinsoon committed
565
566
        ThreadExit    => 10,
        Throw(_)      => 10,
qinsoon's avatar
qinsoon committed
567
568
        SwapStack{..} => 10,
        CommonInst_GetThreadLocal | CommonInst_SetThreadLocal(_) => 10,
qinsoon's avatar
qinsoon committed
569
        CommonInst_Pin(_) | CommonInst_Unpin(_) => 10,
qinsoon's avatar
qinsoon committed
570
571
572

        // others
        Move(_) => 0,
573
        PrintHex(_) => 10,
qinsoon's avatar
qinsoon committed
574
575
        ExnInstruction{ref inner, ..} => estimate_insts_for_ir(&inner)
    }
576
}