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
|
//===-- DependenceAnalyzer.cpp - DependenceAnalyzer ----------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//
//
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "ModuloSched"
#include "DependenceAnalyzer.h"
#include "llvm/Support/Debug.h"
namespace llvm {
/// Create ModuloSchedulingPass
///
FunctionPass *llvm::createDependenceAnalyzer() {
return new DependenceAnalyzer();
}
bool DependenceAnalyzer::runOnFunction(Function &F) {
AA = &getAnalysis<AliasAnalysis>();
TD = &getAnalysis<TargetData>();
return false;
}
static RegisterAnalysis<DependenceAnalyzer>X("depanalyzer", "Dependence Analyzer");
DependenceResult DependenceAnalyzer::getDependenceInfo(Instruction *inst1, Instruction *inst2) {
std::vector<Dependence> deps;
DEBUG(std::cerr << "Inst1: " << *inst1 << "\n");
DEBUG(std::cerr << "Inst2: " << *inst2 << "\n");
if(LoadInst *ldInst = dyn_cast<LoadInst>(inst1)) {
if(StoreInst *stInst = dyn_cast<StoreInst>(inst2)) {
//Get load mem ref
Value *ldOp = ldInst->getOperand(0);
//Get store mem ref
Value *stOp = stInst->getOperand(1);
if(AA->alias(ldOp, (unsigned)TD->getTypeSize(ldOp->getType()),
stOp,(unsigned)TD->getTypeSize(stOp->getType()))
!= AliasAnalysis::NoAlias) {
//Anti Dep
deps.push_back(Dependence(0, Dependence::AntiDep));
}
}
}
else if(StoreInst *stInst = dyn_cast<StoreInst>(inst1)) {
if(LoadInst *ldInst = dyn_cast<LoadInst>(inst2)) {
//Get load mem ref
Value *ldOp = ldInst->getOperand(0);
//Get store mem ref
Value *stOp = stInst->getOperand(1);
if(AA->alias(ldOp, (unsigned)TD->getTypeSize(ldOp->getType()),
stOp,(unsigned)TD->getTypeSize(stOp->getType()))
!= AliasAnalysis::NoAlias) {
//Anti Dep
deps.push_back(Dependence(0, Dependence::TrueDep));
}
}
else if(StoreInst *stInst2 = dyn_cast<StoreInst>(inst2)) {
//Get load mem ref
Value *stOp1 = stInst->getOperand(1);
//Get store mem ref
Value *stOp2 = stInst2->getOperand(1);
if(AA->alias(stOp1, (unsigned)TD->getTypeSize(stOp1->getType()),
stOp2,(unsigned)TD->getTypeSize(stOp2->getType()))
!= AliasAnalysis::NoAlias) {
//Anti Dep
deps.push_back(Dependence(0, Dependence::OutputDep));
}
}
}
else
assert("Expected a load or a store\n");
DependenceResult dr = DependenceResult(deps);
return dr;
}
}
|
