asm_backend.rs 40 KB
Newer Older
1 2
#![allow(unused_variables)]

3
use compiler::backend;
4 5
use compiler::backend::AOT_EMIT_CONTEXT_FILE;
use compiler::backend::AOT_EMIT_DIR;
qinsoon's avatar
qinsoon committed
6
use utils::ByteSize;
7
use compiler::backend::x86_64;
8
use compiler::backend::x86_64::CodeGenerator;
qinsoon's avatar
qinsoon committed
9 10
use compiler::machine_code::CompiledFunction;
use compiler::machine_code::MachineCode;
qinsoon's avatar
qinsoon committed
11
use vm::VM;
12

13 14
use utils::string_utils;

15 16 17
use ast::ptr::P;
use ast::ir::*;

18 19
use std::collections::HashMap;
use std::str;
20
use std::usize;
21
use std::slice::Iter;
22
use std::ops;
23 24

struct ASMCode {
qinsoon's avatar
qinsoon committed
25
    name: MuName, 
26 27
    code: Vec<ASM>,
    reg_defines: HashMap<MuID, Vec<ASMLocation>>,
28 29
    reg_uses: HashMap<MuID, Vec<ASMLocation>>,
    
qinsoon's avatar
qinsoon committed
30 31
    mem_op_used: HashMap<usize, bool>,
    
32 33 34
    preds: Vec<Vec<usize>>,
    succs: Vec<Vec<usize>>,
    
qinsoon's avatar
qinsoon committed
35 36 37 38
    idx_to_blk: HashMap<usize, MuName>,
    blk_to_idx: HashMap<MuName, usize>,
    cond_branches: HashMap<usize, MuName>,
    branches: HashMap<usize, MuName>,
39
    
qinsoon's avatar
qinsoon committed
40 41 42
    blocks: Vec<MuName>,
    block_start: HashMap<MuName, usize>,
    block_range: HashMap<MuName, ops::Range<usize>>,
43
    
qinsoon's avatar
qinsoon committed
44 45
    block_livein: HashMap<MuName, Vec<MuID>>,
    block_liveout: HashMap<MuName, Vec<MuID>>
46 47
}

qinsoon's avatar
qinsoon committed
48 49 50
unsafe impl Send for ASMCode {} 
unsafe impl Sync for ASMCode {}

51 52 53 54
impl MachineCode for ASMCode {
    fn number_of_insts(&self) -> usize {
        self.code.len()
    }
55
    
56 57 58 59 60 61 62 63
    fn is_move(&self, index: usize) -> bool {
        let inst = self.code.get(index);
        match inst {
            Some(inst) => inst.code.starts_with("mov"),
            None => false
        }
    }
    
qinsoon's avatar
qinsoon committed
64 65 66 67
    fn is_using_mem_op(&self, index: usize) -> bool {
        *self.mem_op_used.get(&index).unwrap()
    }
    
qinsoon's avatar
qinsoon committed
68 69 70 71 72 73 74 75
    fn get_succs(&self, index: usize) -> &Vec<usize> {
        &self.succs[index]
    }
    
    fn get_preds(&self, index: usize) -> &Vec<usize> {
        &self.preds[index]
    }
    
76
    fn get_inst_reg_uses(&self, index: usize) -> &Vec<MuID> {
qinsoon's avatar
qinsoon committed
77
        &self.code[index].uses
78 79
    }
    
80
    fn get_inst_reg_defines(&self, index: usize) -> &Vec<MuID> {
qinsoon's avatar
qinsoon committed
81
        &self.code[index].defines
82
    }
83
    
84
    fn replace_reg(&mut self, from: MuID, to: MuID) {
85
        let to_reg_tag : MuName = backend::all_regs().get(&to).unwrap().name().unwrap();
86
        let to_reg_string = "%".to_string() + &to_reg_tag;
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
        
        match self.reg_defines.get(&from) {
            Some(defines) => {
                for loc in defines {
                    let ref mut inst_to_patch = self.code[loc.line];
                    for i in 0..loc.len {
                        string_utils::replace(&mut inst_to_patch.code, loc.index, &to_reg_string, to_reg_string.len());
                    }
                }
            },
            None => {}
        }
        
        match self.reg_uses.get(&from) {
            Some(uses) => {
                for loc in uses {
                    let ref mut inst_to_patch = self.code[loc.line];
                    for i in 0..loc.len {
                        string_utils::replace(&mut inst_to_patch.code, loc.index, &to_reg_string, to_reg_string.len());
                    }   
                }
            },
            None => {}
        }
    }
    
113 114 115 116 117
    fn set_inst_nop(&mut self, index: usize) {
        self.code.remove(index);
        self.code.insert(index, ASM::nop());
    }
    
118 119 120 121 122 123 124 125 126 127 128
    fn emit(&self) -> Vec<u8> {
        let mut ret = vec![];
        
        for inst in self.code.iter() {
            ret.append(&mut inst.code.clone().into_bytes());
            ret.append(&mut "\n".to_string().into_bytes());
        }
        
        ret
    }
    
129 130
    fn trace_mc(&self) {
        trace!("");
131

132 133
        trace!("code for {}: \n", self.name);
        
134 135
        let n_insts = self.code.len();
        for i in 0..n_insts {
136
            self.trace_inst(i);
137 138
        }
        
139 140 141 142 143 144 145
        trace!("")      
    }
    
    fn trace_inst(&self, i: usize) {
        trace!("#{}\t{:30}\t\tdefine: {:?}\tuses: {:?}\tpred: {:?}\tsucc: {:?}", 
            i, self.code[i].code, self.get_inst_reg_defines(i), self.get_inst_reg_uses(i),
            self.preds[i], self.succs[i]);
146
    }
147
    
148 149
    fn get_ir_block_livein(&self, block: &str) -> Option<&Vec<MuID>> {
        self.block_livein.get(&block.to_string())
150 151
    }
    
152 153
    fn get_ir_block_liveout(&self, block: &str) -> Option<&Vec<MuID>> {
        self.block_liveout.get(&block.to_string())
154 155
    }
    
156 157 158 159 160 161 162 163
    fn set_ir_block_livein(&mut self, block: &str, set: Vec<MuID>) {
        self.block_livein.insert(block.to_string(), set);
    }
    
    fn set_ir_block_liveout(&mut self, block: &str, set: Vec<MuID>) {
        self.block_liveout.insert(block.to_string(), set);
    }
    
qinsoon's avatar
qinsoon committed
164
    fn get_all_blocks(&self) -> &Vec<MuName> {
165 166 167
        &self.blocks
    }
    
168 169
    fn get_block_range(&self, block: &str) -> Option<ops::Range<usize>> {
        match self.block_range.get(&block.to_string()) {
170 171 172 173
            Some(r) => Some(r.clone()),
            None => None
        }
    }
174 175 176 177 178 179
}

struct ASM {
    code: String,
    defines: Vec<MuID>,
    uses: Vec<MuID>
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
impl ASM {
    fn symbolic(line: String) -> ASM {
        ASM {
            code: line,
            defines: vec![],
            uses: vec![]
        }
    }
    
    fn inst(inst: String, defines: Vec<MuID>, uses: Vec<MuID>) -> ASM {
        ASM {
            code: inst,
            defines: defines,
            uses: uses
        }
    }
    
    fn branch(line: String) -> ASM {
        ASM {
            code: line,
            defines: vec![],
            uses: vec![]
        }
    }
206 207 208 209 210 211 212 213
    
    fn nop() -> ASM {
        ASM {
            code: "".to_string(),
            defines: vec![],
            uses: vec![]
        }
    }
214 215
}

216
#[derive(Clone, Debug)]
217 218 219 220 221 222 223
struct ASMLocation {
    line: usize,
    index: usize,
    len: usize
}

impl ASMLocation {
224 225
    /// the 'line' field will be updated later
    fn new(index: usize, len: usize) -> ASMLocation {
226
        ASMLocation{
227
            line: usize::MAX,
228 229 230 231 232 233
            index: index,
            len: len
        }
    }
}

234
pub struct ASMCodeGen {
235
    cur: Option<Box<ASMCode>>
236 237
}

238
const REG_PLACEHOLDER_LEN : usize = 5;
239 240 241 242 243 244
lazy_static! {
    pub static ref REG_PLACEHOLDER : String = {
        let blank_spaces = [' ' as u8; REG_PLACEHOLDER_LEN];
        
        format!("%{}", str::from_utf8(&blank_spaces).unwrap())
    };
245 246 247 248
}

impl ASMCodeGen {
    pub fn new() -> ASMCodeGen {
249
        ASMCodeGen {
250
            cur: None
251 252 253 254 255 256 257 258 259 260 261
        }
    }
    
    fn cur(&self) -> &ASMCode {
        self.cur.as_ref().unwrap()
    }
    
    fn cur_mut(&mut self) -> &mut ASMCode {
        self.cur.as_mut().unwrap()
    }
    
262 263 264 265
    fn line(&self) -> usize {
        self.cur().code.len()
    }
    
266 267 268 269 270
    fn add_asm_label(&mut self, code: String) {
        let l = self.line();
        self.cur_mut().code.push(ASM::symbolic(code));
    }
    
271
    fn add_asm_block_label(&mut self, code: String, block_name: MuName) {
272 273 274
        let l = self.line();
        self.cur_mut().code.push(ASM::symbolic(code));
        
275
        self.cur_mut().idx_to_blk.insert(l, block_name.clone());
276 277 278
        self.cur_mut().blk_to_idx.insert(block_name, l);
    }
    
279 280 281 282
    fn add_asm_symbolic(&mut self, code: String){
        self.cur_mut().code.push(ASM::symbolic(code));
    }
    
283 284 285 286
    fn prepare_machine_regs(&self, regs: Iter<P<Value>>) -> Vec<MuID> {
        regs.map(|x| self.prepare_machine_reg(x)).collect()
    } 
    
287
    fn add_asm_call(&mut self, code: String) {
288 289 290 291 292 293
        let mut uses : Vec<MuID> = self.prepare_machine_regs(x86_64::ARGUMENT_GPRs.iter());
        uses.append(&mut self.prepare_machine_regs(x86_64::ARGUMENT_FPRs.iter()));
        
        let mut defines : Vec<MuID> = self.prepare_machine_regs(x86_64::RETURN_GPRs.iter());
        defines.append(&mut self.prepare_machine_regs(x86_64::RETURN_FPRs.iter()));
          
qinsoon's avatar
qinsoon committed
294
        self.add_asm_inst(code, defines, vec![], uses, vec![], false);
295 296 297
    }
    
    fn add_asm_ret(&mut self, code: String) {
298 299 300
        let mut uses : Vec<MuID> = self.prepare_machine_regs(x86_64::RETURN_GPRs.iter());
        uses.append(&mut self.prepare_machine_regs(x86_64::RETURN_FPRs.iter()));
        
qinsoon's avatar
qinsoon committed
301
        self.add_asm_inst(code, vec![], vec![], uses, vec![], false);
302 303
    }
    
304
    fn add_asm_branch(&mut self, code: String, target: MuName) {
305 306
        let l = self.line();
        self.cur_mut().branches.insert(l, target);
qinsoon's avatar
qinsoon committed
307 308
        
        self.add_asm_inst(code, vec![], vec![], vec![], vec![], false);
309 310
    }
    
311
    fn add_asm_branch2(&mut self, code: String, target: MuName) {
312 313
        let l = self.line();
        self.cur_mut().cond_branches.insert(l, target);
qinsoon's avatar
qinsoon committed
314 315
        
        self.add_asm_inst(code, vec![], vec![], vec![], vec![], false);
316 317 318 319 320 321
    }
    
    fn add_asm_inst(
        &mut self, 
        code: String, 
        defines: Vec<MuID>,
322
        mut define_locs: Vec<ASMLocation>, 
323
        uses: Vec<MuID>,
qinsoon's avatar
qinsoon committed
324 325
        mut use_locs: Vec<ASMLocation>,
        is_using_mem_op: bool) 
326
    {
327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356
        let line = self.line();
        
        trace!("asm: {}", code);
        trace!("     defines: {:?}, def_locs: {:?}", defines, define_locs);
        trace!("     uses: {:?}, use_locs: {:?}", uses, use_locs);
        let mc = self.cur_mut();
       
        // add locations of defined registers
        for i in 0..define_locs.len() {
            let id = defines[i];
            
            // update line in location
            let ref mut loc = define_locs[i];
            loc.line = line;
            
            if mc.reg_defines.contains_key(&id) {
                mc.reg_defines.get_mut(&id).unwrap().push(loc.clone());
            } else {
                mc.reg_defines.insert(id, vec![loc.clone()]);
            }
        }
       
        for i in 0..use_locs.len() {
            let id = uses[i];
            
            // update line in location
            let ref mut loc = use_locs[i];
            loc.line = line;
            
            if mc.reg_uses.contains_key(&id) {
357
                mc.reg_uses.get_mut(&id).unwrap().push(loc.clone());
358
            } else {
359
                mc.reg_uses.insert(id, vec![loc.clone()]);
360 361
            }
        }
362
       
363 364
        // put the instruction
        mc.code.push(ASM::inst(code, defines, uses));
qinsoon's avatar
qinsoon committed
365
        mc.mem_op_used.insert(line, is_using_mem_op);
366 367 368 369
    }
    
    fn define_reg(&mut self, reg: &P<Value>, loc: ASMLocation) {
        let id = reg.extract_ssa_id().unwrap();
370
        
371 372 373 374 375 376 377
        let code = self.cur_mut();
        if code.reg_defines.contains_key(&id) {
            let regs = code.reg_defines.get_mut(&id).unwrap();
            regs.push(loc);
        } else {
            code.reg_defines.insert(id, vec![loc]);
        } 
378 379 380 381 382 383
    }
    
    fn use_reg(&mut self, reg: &P<Value>, loc: ASMLocation) {
        let id = reg.extract_ssa_id().unwrap();
        
        let code = self.cur_mut();
384 385 386
        if code.reg_uses.contains_key(&id) {
            let reg_uses = code.reg_uses.get_mut(&id).unwrap();
            reg_uses.push(loc);
387
        } else {
388
            code.reg_uses.insert(id, vec![loc]);
389 390 391
        } 
    }
    
392
    fn prepare_reg(&self, op: &P<Value>, loc: usize) -> (String, MuID, ASMLocation) {
393 394 395 396 397 398 399
        if cfg!(debug_assertions) {
            match op.v {
                Value_::SSAVar(_) => {},
                _ => panic!("expecting register op")
            }
        }
        
400 401 402 403 404 405
        let str = self.asm_reg_op(op);
        let len = str.len();
        (str, op.extract_ssa_id().unwrap(), ASMLocation::new(loc, len)) 
    }
    
    fn prepare_machine_reg(&self, op: &P<Value>) -> MuID {
406 407 408 409 410 411 412
        if cfg!(debug_assertions) {
            match op.v {
                Value_::SSAVar(_) => {},
                _ => panic!("expecting machine register op")
            }
        }        
        
413
        op.extract_ssa_id().unwrap()
414
    }
415
    
416 417
    #[allow(unused_assignments)]
    fn prepare_mem(&self, op: &P<Value>, loc: usize) -> (String, Vec<MuID>, Vec<ASMLocation>) {
418 419 420 421 422 423 424
        if cfg!(debug_assertions) {
            match op.v {
                Value_::Memory(_) => {},
                _ => panic!("expecting register op")
            }
        }        
        
425 426 427 428
        let mut ids : Vec<MuID> = vec![];
        let mut locs : Vec<ASMLocation> = vec![];
        let mut result_str : String = "".to_string();
        
429
        let mut loc_cursor : usize = loc;
430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511
        
        match op.v {
            // offset(base,index,scale)
            Value_::Memory(MemoryLocation::Address{ref base, ref offset, ref index, scale}) => {
                // deal with offset
                if offset.is_some() {
                    let offset = offset.as_ref().unwrap();
                    
                    match offset.v {
                        Value_::SSAVar(id) => {
                            // temp as offset
                            let (str, id, loc) = self.prepare_reg(offset, 0);
                            
                            result_str.push_str(&str);
                            ids.push(id);
                            locs.push(loc);
                            
                            loc_cursor += str.len();
                        },
                        Value_::Constant(Constant::Int(val)) => {
                            let str = val.to_string();
                            
                            result_str.push_str(&str);
                            loc_cursor += str.len();
                        },
                        _ => panic!("unexpected offset type: {:?}", offset)
                    }
                }
                
                result_str.push('(');
                loc_cursor += 1; 
                
                // deal with base, base is ssa
                let (str, id, loc) = self.prepare_reg(base, loc_cursor);
                result_str.push_str(&str);
                ids.push(id);
                locs.push(loc);
                loc_cursor += str.len();
                
                // deal with index (ssa or constant)
                if index.is_some() {
                    result_str.push(',');
                    loc_cursor += 1; // plus 1 for ,                    
                    
                    let index = index.as_ref().unwrap();
                    
                    match index.v {
                        Value_::SSAVar(id) => {
                            // temp as offset
                            let (str, id, loc) = self.prepare_reg(index, loc_cursor);
                            
                            result_str.push_str(&str);
                            ids.push(id);
                            locs.push(loc);
                            
                            loc_cursor += str.len();
                        },
                        Value_::Constant(Constant::Int(val)) => {
                            let str = val.to_string();
                            
                            result_str.push_str(&str);
                            loc_cursor += str.len();
                        },
                        _ => panic!("unexpected index type: {:?}", index)
                    }
                    
                    // scale
                    if scale.is_some() {
                        result_str.push(',');
                        loc_cursor += 1;
                        
                        let scale = scale.unwrap();
                        let str = scale.to_string();
                        
                        result_str.push_str(&str);
                        loc_cursor += str.len();
                    }
                }
                
                result_str.push(')');
                loc_cursor += 1;
            },
512 513
            Value_::Memory(MemoryLocation::Symbolic{ref base, ref label}) => {
                result_str.push_str(&symbol(label.clone()));
514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535
                loc_cursor += label.len();
                
                if base.is_some() {
                    result_str.push('(');
                    loc_cursor += 1;
                    
                    let (str, id, loc) = self.prepare_reg(base.as_ref().unwrap(), loc_cursor);
                    result_str.push_str(&str);
                    ids.push(id);
                    locs.push(loc);
                    loc_cursor += str.len();
                    
                    result_str.push(')');
                    loc_cursor += 1;                    
                }
            },
            _ => panic!("expect mem location as value")
        }
        
        (result_str, ids, locs)
    }
    
536 537
    fn asm_reg_op(&self, op: &P<Value>) -> String {
        let id = op.extract_ssa_id().unwrap();
qinsoon's avatar
qinsoon committed
538
        if id < MACHINE_ID_END {
539
            // machine reg
540
            format!("%{}", op.name().unwrap())
541 542 543 544 545 546
        } else {
            // virtual register, use place holder
            REG_PLACEHOLDER.clone()
        }
    }
    
qinsoon's avatar
qinsoon committed
547
    fn asm_block_label(&self, label: MuName) -> String {
548
        symbol(format!("{}_{}", self.cur().name, label))
549
    }
550 551 552 553 554 555 556 557 558 559 560 561 562 563
    
    fn control_flow_analysis(&mut self) {
        // control flow analysis
        let n_insts = self.line();
        
        let code = self.cur_mut();
        code.preds = vec![vec![]; n_insts];
        code.succs = vec![vec![]; n_insts];
        
        for i in 0..n_insts {
            // determine predecessor - if cur is not block start, its predecessor is previous insts
            let is_block_start = code.idx_to_blk.get(&i);
            if is_block_start.is_none() {
                if i > 0 {
564 565
                    trace!("inst {}: not a block start", i);
                    trace!("inst {}: set PREDS as previous inst {}", i, i-1);
566 567 568 569 570 571 572 573 574 575 576 577
                    code.preds[i].push(i - 1);
                }
            } else {
                // if cur is a branch target, we already set its predecessor
                // if cur is a fall-through block, we set it in a sanity check pass
            }
            
            // determine successor
            let is_branch = code.branches.get(&i);
            if is_branch.is_some() {
                // branch to target
                let target = is_branch.unwrap();
578 579
                trace!("inst {}: is a branch to {}", i, target);
                                
580
                let target_n = code.blk_to_idx.get(target).unwrap();
581
                trace!("inst {}: branch target index is {}", i, target_n);
582 583
                
                // cur inst's succ is target
584
                trace!("inst {}: set SUCCS as branch target {}", i, target_n);
585 586 587
                code.succs[i].push(*target_n);
                
                // target's pred is cur
588
                trace!("inst {}: set PREDS as branch source {}", target_n, i);
589 590 591 592 593 594
                code.preds[*target_n].push(i);
            } else {
                let is_cond_branch = code.cond_branches.get(&i);
                if is_cond_branch.is_some() {
                    // branch to target
                    let target = is_cond_branch.unwrap();
595 596
                    trace!("inst {}: is a cond branch to {}", i, target);
                    
597
                    let target_n = code.blk_to_idx.get(target).unwrap();
598
                    trace!("inst {}: branch target index is {}", i, target_n);
599 600 601
                    
                    // cur insts' succ is target and next inst
                    code.succs[i].push(*target_n);
602
                    trace!("inst {}: set SUCCS as branch target {}", i, target_n);
603
                    if i < n_insts - 1 {
604
                        trace!("inst {}: set SUCCS as next inst", i + 1);                        
605 606 607 608 609
                        code.succs[i].push(i + 1);
                    }
                    
                    // target's pred is cur
                    code.preds[*target_n].push(i);
610
                    trace!("inst {}: set PREDS as {}", *target_n, i);
611 612
                } else {
                    // not branch nor cond branch, succ is next inst
613
                    trace!("inst {}: not a branch inst", i);
614
                    if i < n_insts - 1 {
615
                        trace!("inst {}: set SUCCS as next inst {}", i, i + 1);
616 617 618 619 620 621 622 623 624 625 626 627 628
                        code.succs[i].push(i + 1);
                    }
                }
            } 
        }
        
        // a sanity check for fallthrough blocks
        for i in 0..n_insts {
            if i != 0 && code.preds[i].len() == 0 {
                code.preds[i].push(i - 1);
            }
        }        
    }
629 630 631
}

impl CodeGenerator for ASMCodeGen {
qinsoon's avatar
qinsoon committed
632
    fn start_code(&mut self, func_name: MuName) {
633
        self.cur = Some(Box::new(ASMCode {
634
                name: func_name.clone(),
635
                code: vec![],
636
                reg_defines: HashMap::new(),
637 638
                reg_uses: HashMap::new(),
                
qinsoon's avatar
qinsoon committed
639 640
                mem_op_used: HashMap::new(),
                
641 642 643 644 645 646
                preds: vec![],
                succs: vec![],
                
                idx_to_blk: HashMap::new(),
                blk_to_idx: HashMap::new(),
                cond_branches: HashMap::new(),
647 648
                branches: HashMap::new(),
                
649 650 651 652
                blocks: vec![],
                block_start: HashMap::new(),
                block_range: HashMap::new(),
                
653 654
                block_livein: HashMap::new(),
                block_liveout: HashMap::new()
655
            }));
656
        
qinsoon's avatar
qinsoon committed
657
        // to link with C sources via gcc
658 659
        self.add_asm_symbolic(directive_globl(symbol(func_name.clone())));
        self.add_asm_symbolic(format!("{}:", symbol(func_name.clone())));
660 661
    }
    
662 663 664
    fn finish_code(&mut self) -> Box<MachineCode> {
        self.control_flow_analysis();
        self.cur.take().unwrap()
665 666 667 668 669 670 671 672 673
    }
    
    fn print_cur_code(&self) {
        println!("");
        
        if self.cur.is_some() {
            let code = self.cur.as_ref().unwrap();
            
            println!("code for {}: ", code.name);
674 675 676 677
            let n_insts = code.code.len();
            for i in 0..n_insts {
                let ref line = code.code[i];
                println!("#{}\t{}", i, line.code);
678 679 680 681 682 683 684 685
            }
        } else {
            println!("no current code");
        }
        
        println!("");
    }
    
qinsoon's avatar
qinsoon committed
686
    fn start_block(&mut self, block_name: MuName) {
687 688 689
        let label = format!("{}:", self.asm_block_label(block_name.clone()));        
        self.add_asm_block_label(label, block_name.clone());
        self.cur_mut().blocks.push(block_name.clone());
690 691 692 693 694
        
        let start = self.line();
        self.cur_mut().block_start.insert(block_name, start);
    }
    
qinsoon's avatar
qinsoon committed
695
    fn end_block(&mut self, block_name: MuName) {
696 697 698 699
        let start : usize = *self.cur().block_start.get(&block_name).unwrap();
        let end : usize = self.line();
        
        self.cur_mut().block_range.insert(block_name, (start..end));
700 701
    }
    
qinsoon's avatar
qinsoon committed
702
    fn set_block_livein(&mut self, block_name: MuName, live_in: &Vec<P<Value>>) {
703 704 705 706
        let cur = self.cur_mut();
        
        let mut res = {
            if !cur.block_livein.contains_key(&block_name) {
707
                cur.block_livein.insert(block_name.clone(), vec![]);
708 709 710 711 712 713 714 715 716 717 718 719
            } else {
                panic!("seems we are inserting livein to block {} twice", block_name);
            }
            
            cur.block_livein.get_mut(&block_name).unwrap()
        };
        
        for value in live_in {
            res.push(value.extract_ssa_id().unwrap());
        }
    }
    
qinsoon's avatar
qinsoon committed
720
    fn set_block_liveout(&mut self, block_name: MuName, live_out: &Vec<P<Value>>) {
721 722 723 724
        let cur = self.cur_mut();
        
        let mut res = {
            if !cur.block_liveout.contains_key(&block_name) {
725
                cur.block_liveout.insert(block_name.clone(), vec![]);
726 727 728 729 730 731 732 733 734 735 736 737 738 739 740
            } else {
                panic!("seems we are inserting livein to block {} twice", block_name);
            }
            
            cur.block_liveout.get_mut(&block_name).unwrap()
        };
        
        for value in live_out {
            match value.extract_ssa_id() {
                Some(id) => res.push(id),
                None => {}
            }
        }        
    }
    
741
    fn emit_cmp_r64_r64(&mut self, op1: &P<Value>, op2: &P<Value>) {
qinsoon's avatar
qinsoon committed
742
        trace!("emit: cmp {} {}", op1, op2);
743
        
744 745
        let (reg1, id1, loc1) = self.prepare_reg(op1, 4 + 1);
        let (reg2, id2, loc2) = self.prepare_reg(op2, 4 + 1 + reg1.len() + 1);
746
        
qinsoon's avatar
qinsoon committed
747
        let asm = format!("cmpq {},{}", reg1, reg2);
748
        
749 750 751 752 753
        self.add_asm_inst(
            asm,
            vec![],
            vec![],
            vec![id1, id2],
qinsoon's avatar
qinsoon committed
754 755
            vec![loc1, loc2],
            false
756
        );
757 758
    }
    
759
    fn emit_cmp_r64_imm32(&mut self, op1: &P<Value>, op2: i32) {
qinsoon's avatar
qinsoon committed
760
        trace!("emit: cmp {} {}", op1, op2);
761
        
762
        let (reg1, id1, loc1) = self.prepare_reg(op1, 4 + 1 + 1 + op2.to_string().len() + 1);
763
        
qinsoon's avatar
qinsoon committed
764
        let asm = format!("cmpq ${},{}", op2, reg1);
765
        
766 767 768 769 770
        self.add_asm_inst(
            asm,
            vec![],
            vec![],
            vec![id1],
qinsoon's avatar
qinsoon committed
771 772
            vec![loc1],
            false
773
        )
774 775 776
    }
    
    fn emit_cmp_r64_mem64(&mut self, op1: &P<Value>, op2: &P<Value>) {
qinsoon's avatar
qinsoon committed
777
        trace!("emit: cmp {} {}", op1, op2);
778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795
        
        let (reg, id1, loc1) = self.prepare_reg(op1, 4 + 1);
        let (mem, mut id2, mut loc2) = self.prepare_mem(op2, 4 + 1 + reg.len() + 1);
        
        let asm = format!("cmpq {},{}", reg, mem);
        
        // merge use vec
        id2.push(id1);
        loc2.push(loc1);
        
        self.add_asm_inst(
            asm,
            vec![],
            vec![],
            id2,
            loc2,
            true
        )
796 797
    }
    
798
    fn emit_mov_r64_imm32(&mut self, dest: &P<Value>, src: i32) {
qinsoon's avatar
qinsoon committed
799
        trace!("emit: mov {} -> {}", src, dest);
800
        
801
        let (reg1, id1, loc1) = self.prepare_reg(dest, 4 + 1 + 1 + src.to_string().len() + 1);
802
        
qinsoon's avatar
qinsoon committed
803
        let asm = format!("movq ${},{}", src, reg1);
804
        
805 806 807
        self.add_asm_inst(
            asm,
            vec![id1],
808 809
            vec![loc1],
            vec![],
qinsoon's avatar
qinsoon committed
810 811
            vec![],
            false
812
        )
813 814
    }
    
815
    // load
816
    fn emit_mov_r64_mem64(&mut self, dest: &P<Value>, src: &P<Value>) {
qinsoon's avatar
qinsoon committed
817
        trace!("emit: mov {} -> {}", src, dest);
818 819 820 821 822 823 824 825 826 827 828
        
        let (mem, id1, loc1) = self.prepare_mem(src, 4 + 1);
        let (reg, id2, loc2) = self.prepare_reg(dest, 4 + 1 + mem.len() + 1);
        
        let asm = format!("movq {},{}", mem, reg);
        
        self.add_asm_inst(
            asm,
            vec![id2],
            vec![loc2],
            id1,
qinsoon's avatar
qinsoon committed
829 830
            loc1,
            true
831 832 833
        )
    }
    
834
    // store
835 836 837 838 839 840 841
    fn emit_mov_mem64_r64(&mut self, dest: &P<Value>, src: &P<Value>) {
        trace!("emit: mov {} -> {}", src, dest);
        
        let (reg, id1, loc1) = self.prepare_reg(src, 4 + 1);
        let (mem, mut id2, mut loc2) = self.prepare_mem(dest, 4 + 1 + reg.len() + 1);
        
        // the register we used for the memory location is counted as 'use'
842
        // use the vec from mem as 'use' (push use reg from src to it)
843 844 845 846 847 848 849 850 851 852
        id2.push(id1);
        loc2.push(loc1);
        
        let asm = format!("movq {},{}", reg, mem);
        
        self.add_asm_inst(
            asm,
            vec![], // not defining anything (write to memory)
            vec![],
            id2,
qinsoon's avatar
qinsoon committed
853 854
            loc2,
            true
855 856 857
        )
    }
    
858
    fn emit_mov_mem64_imm32(&mut self, dest: &P<Value>, src: i32) {
859 860 861 862 863 864 865 866 867 868 869
        trace!("emit: mov {} -> {}", src, dest);
        
        let (mem, id, loc) = self.prepare_mem(dest, 4 + 1 + 1 + src.to_string().len() + 1);
        
        let asm = format!("movq ${},{}", src, mem);
        
        self.add_asm_inst(
            asm,
            vec![],
            vec![],
            id,
qinsoon's avatar
qinsoon committed
870 871
            loc,
            true
872
        )
qinsoon's avatar
qinsoon committed
873 874 875 876
    }
    
    fn emit_mov_r64_r64(&mut self, dest: &P<Value>, src: &P<Value>) {
        trace!("emit: mov {} -> {}", src, dest);
877
        
878 879
        let (reg1, id1, loc1) = self.prepare_reg(src, 4 + 1);
        let (reg2, id2, loc2) = self.prepare_reg(dest, 4 + 1 + reg1.len() + 1);
880
        
qinsoon's avatar
qinsoon committed
881
        let asm = format!("movq {},{}", reg1, reg2);
882
        
883 884 885
        self.add_asm_inst(
            asm,
            vec![id2],
886 887
            vec![loc2],
            vec![id1],
qinsoon's avatar
qinsoon committed
888 889
            vec![loc1],
            false
890
        )
qinsoon's avatar
qinsoon committed
891 892 893 894
    }
    
    fn emit_add_r64_r64(&mut self, dest: &P<Value>, src: &P<Value>) {
        trace!("emit: add {}, {} -> {}", dest, src, dest);
895
        
896 897
        let (reg1, id1, loc1) = self.prepare_reg(src, 4 + 1);
        let (reg2, id2, loc2) = self.prepare_reg(dest, 4 + 1 + reg1.len() + 1);
898
        
qinsoon's avatar
qinsoon committed
899
        let asm = format!("addq {},{}", reg1, reg2);
900
        
901 902
        self.add_asm_inst(
            asm,
903 904
            vec![id2],
            vec![loc2.clone()],
905
            vec![id1, id2],
qinsoon's avatar
qinsoon committed
906 907
            vec![loc1, loc2],
            false
908
        )
qinsoon's avatar
qinsoon committed
909 910
    }
    
911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928
    fn emit_lea_r64(&mut self, dest: &P<Value>, src: &P<Value>) {
        trace!("emit: lea {} -> {}", src, dest);
        
        let (mem, id1, loc1) = self.prepare_mem(src, 4 + 1);
        let (reg, id2, loc2) = self.prepare_reg(dest, 4 + 1 + mem.len() + 1);
        
        let asm = format!("leaq {},{}", mem, reg);
        
        self.add_asm_inst(
            asm,
            vec![id2],
            vec![loc2],
            id1,
            loc1,
            true
        ) 
    }
    
929
    fn emit_and_r64_imm32(&mut self, dest: &P<Value>, src: i32) {
930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963
        trace!("emit: and {}, {} -> {}", src, dest, dest);
        
        let (reg1, id1, loc1) = self.prepare_reg(dest, 4 + 1 + 1 + src.to_string().len() + 1);

        let asm = format!("andq ${},{}", src, reg1);
        
        self.add_asm_inst(
            asm,
            vec![id1],
            vec![loc1.clone()],
            vec![id1],
            vec![loc1],
            false
        )
    }
    
    fn emit_and_r64_r64(&mut self, dest: &P<Value>, src: &P<Value>) {
        trace!("emit: and {}, {} -> {}", src, dest, dest);
        
        let (reg1, id1, loc1) = self.prepare_reg(src, 4 + 1);
        let (reg2, id2, loc2) = self.prepare_reg(dest, 4 + 1 + reg1.len() + 1); 

        let asm = format!("andq {},{}", reg1, reg2);
        
        self.add_asm_inst(
            asm,
            vec![id2],
            vec![loc2.clone()],
            vec![id1, id2],
            vec![loc1, loc2],
            false
        )
    }    
    
qinsoon's avatar
qinsoon committed
964 965
    fn emit_add_r64_mem64(&mut self, dest: &P<Value>, src: &P<Value>) {
        trace!("emit: add {}, {} -> {}", dest, src, dest);
966
        unimplemented!()
qinsoon's avatar
qinsoon committed
967 968
    }
    
969
    fn emit_add_r64_imm32(&mut self, dest: &P<Value>, src: i32) {
qinsoon's avatar
qinsoon committed
970
        trace!("emit: add {}, {} -> {}", dest, src, dest);
971
        
972
        let (reg1, id1, loc1) = self.prepare_reg(dest, 4 + 1 + 1 + src.to_string().len() + 1);
973
        
974
        let asm = format!("addq ${},{}", src, reg1);
975
        
976 977 978 979 980
        self.add_asm_inst(
            asm,
            vec![id1],
            vec![loc1.clone()],
            vec![id1],
qinsoon's avatar
qinsoon committed
981 982
            vec![loc1],
            false
983
        )
qinsoon's avatar
qinsoon committed
984 985 986 987
    }
    
    fn emit_sub_r64_r64(&mut self, dest: &P<Value>, src: &P<Value>) {
        trace!("emit: sub {}, {} -> {}", dest, src, dest);
988
        
989 990
        let (reg1, id1, loc1) = self.prepare_reg(src, 4 + 1);
        let (reg2, id2, loc2) = self.prepare_reg(dest, 4 + 1 + reg1.len() + 1);
991
        
qinsoon's avatar
qinsoon committed
992
        let asm = format!("subq {},{}", reg1, reg2);
993
        
994 995
        self.add_asm_inst(
            asm,
996 997
            vec![id2],
            vec![loc2.clone()],
998
            vec![id1, id2],
qinsoon's avatar
qinsoon committed
999 1000
            vec![loc1, loc2],
            false
1001
        )        
qinsoon's avatar
qinsoon committed
1002 1003 1004 1005
    }
    
    fn emit_sub_r64_mem64(&mut self, dest: &P<Value>, src: &P<Value>) {
        trace!("emit: sub {}, {} -> {}", dest, src, dest);
1006
        unimplemented!()
qinsoon's avatar
qinsoon committed
1007 1008
    }
    
1009
    fn emit_sub_r64_imm32(&mut self, dest: &P<Value>, src: i32) {
qinsoon's avatar
qinsoon committed
1010
        trace!("emit: sub {}, {} -> {}", dest, src, dest);
1011
        
1012
        let (reg1, id1, loc1) = self.prepare_reg(dest, 4 + 1 + 1 + src.to_string().len() + 1);
1013
        
qinsoon's avatar
qinsoon committed
1014
        let asm = format!("subq ${},{}", src, reg1);
1015
        
1016 1017 1018 1019 1020
        self.add_asm_inst(
            asm,
            vec![id1],
            vec![loc1.clone()],
            vec![id1],
qinsoon's avatar
qinsoon committed
1021 1022
            vec![loc1],
            false
1023
        )        
qinsoon's avatar
qinsoon committed
1024 1025
    }
    
1026
    fn emit_mul_r64(&mut self, src: &P<Value>) {
1027
        trace!("emit: mul rax, {} -> (rdx, rax)", src);
1028
        
1029
        let (reg, id, loc) = self.prepare_reg(src, 3 + 1);
1030 1031
        let rax = self.prepare_machine_reg(&x86_64::RAX);
        let rdx = self.prepare_machine_reg(&x86_64::RDX);
1032 1033 1034
        
        let asm = format!("mul {}", reg);
        
1035 1036 1037 1038 1039
        self.add_asm_inst(
            asm,
            vec![rax, rdx],
            vec![],
            vec![id, rax],
qinsoon's avatar
qinsoon committed
1040 1041
            vec![loc],
            false
1042
        )
1043 1044 1045 1046
    }
    
    fn emit_mul_mem64(&mut self, src: &P<Value>) {
        trace!("emit: mul rax, {} -> rax", src);
1047
        unimplemented!()
1048 1049
    }
    
1050
    fn emit_jmp(&mut self, dest_name: MuName) {
qinsoon's avatar
qinsoon committed
1051
        trace!("emit: jmp {}", dest_name);
1052 1053
        
        // symbolic label, we dont need to patch it
1054
        let asm = format!("jmp {}", self.asm_block_label(dest_name.clone()));
qinsoon's avatar
qinsoon committed
1055
        self.add_asm_branch(asm, dest_name)
qinsoon's avatar
qinsoon committed
1056 1057
    }
    
1058
    fn emit_je(&mut self, dest_name: MuName) {
qinsoon's avatar
qinsoon committed
1059
        trace!("emit: je {}", dest_name);
1060
        
1061
        let asm = format!("je {}", self.asm_block_label(dest_name.clone()));
qinsoon's avatar
qinsoon committed
1062
        self.add_asm_branch2(asm, dest_name);        
qinsoon's avatar
qinsoon committed
1063 1064
    }
    
1065
    fn emit_jne(&mut self, dest_name: MuName) {
qinsoon's avatar
qinsoon committed
1066
        trace!("emit: jne {}", dest_name);
1067
        
1068
        let asm = format!("jne {}", self.asm_block_label(dest_name.clone()));
qinsoon's avatar
qinsoon committed
1069
        self.add_asm_branch2(asm, dest_name);
qinsoon's avatar
qinsoon committed
1070 1071
    }
    
1072
    fn emit_ja(&mut self, dest_name: MuName) {
qinsoon's avatar
qinsoon committed
1073
        trace!("emit: ja {}", dest_name);
1074
        
1075
        let asm = format!("ja {}", self.asm_block_label(dest_name.clone()));
qinsoon's avatar
qinsoon committed
1076
        self.add_asm_branch2(asm, dest_name);
qinsoon's avatar
qinsoon committed
1077 1078
    }
    
1079
    fn emit_jae(&mut self, dest_name: MuName) {
qinsoon's avatar
qinsoon committed
1080
        trace!("emit: jae {}", dest_name);
1081
        
1082
        let asm = format!("jae {}", self.asm_block_label(dest_name.clone()));
qinsoon's avatar
qinsoon committed
1083
        self.add_asm_branch2(asm, dest_name);        
qinsoon's avatar
qinsoon committed
1084 1085
    }
    
1086
    fn emit_jb(&mut self, dest_name: MuName) {
qinsoon's avatar
qinsoon committed
1087
        trace!("emit: jb {}", dest_name);
1088
        
1089
        let asm = format!("jb {}", self.asm_block_label(dest_name.clone()));
qinsoon's avatar
qinsoon committed
1090
        self.add_asm_branch2(asm, dest_name);
qinsoon's avatar
qinsoon committed
1091 1092
    }
    
1093
    fn emit_jbe(&mut self, dest_name: MuName) {
qinsoon's avatar
qinsoon committed
1094
        trace!("emit: jbe {}", dest_name);
1095
        
1096
        let asm = format!("jbe {}", self.asm_block_label(dest_name.clone()));
qinsoon's avatar
qinsoon committed
1097
        self.add_asm_branch2(asm, dest_name);        
qinsoon's avatar
qinsoon committed
1098 1099
    }
    
1100
    fn emit_jg(&mut self, dest_name: MuName) {
qinsoon's avatar
qinsoon committed
1101
        trace!("emit: jg {}", dest_name);
1102
        
1103
        let asm = format!("jg {}", self.asm_block_label(dest_name.clone()));
qinsoon's avatar
qinsoon committed
1104
        self.add_asm_branch2(asm, dest_name);        
1105 1106
    }
    
1107
    fn emit_jge(&mut self, dest_name: MuName) {
qinsoon's avatar
qinsoon committed
1108
        trace!("emit: jge {}", dest_name);
1109
        
1110
        let asm = format!("jge {}", self.asm_block_label(dest_name.clone()));
qinsoon's avatar
qinsoon committed
1111
        self.add_asm_branch2(asm, dest_name);        
1112 1113
    }
    
1114
    fn emit_jl(&mut self, dest_name: MuName) {
qinsoon's avatar
qinsoon committed
1115
        trace!("emit: jl {}", dest_name);
1116
        
1117
        let asm = format!("jl {}", self.asm_block_label(dest_name.clone()));
qinsoon's avatar
qinsoon committed
1118
        self.add_asm_branch2(asm, dest_name);        
1119 1120
    }
    
1121
    fn emit_jle(&mut self, dest_name: MuName) {
qinsoon's avatar
qinsoon committed
1122
        trace!("emit: jle {}", dest_name);
1123
        
1124
        let asm = format!("jle {}", self.asm_block_label(dest_name.clone()));
qinsoon's avatar
qinsoon committed
1125
        self.add_asm_branch2(asm, dest_name);        
1126 1127
    }    
    
qinsoon's avatar
qinsoon committed
1128
    fn emit_call_near_rel32(&mut self, func: MuName) {
1129
        trace!("emit: call {}", func);
1130
        
qinsoon's avatar
qinsoon committed
1131
        let asm = format!("call {}", symbol(func));
1132
        self.add_asm_call(asm);
1133 1134
        
        // FIXME: call interferes with machine registers
1135 1136 1137 1138
    }
    
    fn emit_call_near_r64(&mut self, func: &P<Value>) {
        trace!("emit: call {}", func);
1139
        unimplemented!()
1140 1141 1142
    }
    
    fn emit_call_near_mem64(&mut self, func: &P<Value>) {
qinsoon's avatar
qinsoon committed
1143
        trace!("emit: call {}", func);
1144
        unimplemented!()
qinsoon's avatar
qinsoon committed
1145 1146 1147 1148
    }
    
    fn emit_ret(&mut self) {
        trace!("emit: ret");
1149 1150
        
        let asm = format!("ret");
1151
        self.add_asm_ret(asm);
1152
    }
1153