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
|
//===--- AADumper.cpp - Compare all values in Function with AA ------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This pass collects all values in a function and applies alias analysis to
/// them. The purpose of this is to enable unit tests for SIL Alias Analysis
/// implementations independent of any other passes.
///
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "sil-aa-evaluator"
#include "swift/SILOptimizer/PassManager/Passes.h"
#include "swift/SIL/SILArgument.h"
#include "swift/SIL/SILFunction.h"
#include "swift/SIL/SILValue.h"
#include "swift/SILOptimizer/Analysis/AliasAnalysis.h"
#include "swift/SILOptimizer/Analysis/Analysis.h"
#include "swift/SILOptimizer/PassManager/Transforms.h"
#include "llvm/Support/Debug.h"
using namespace swift;
//===----------------------------------------------------------------------===//
// Value Gatherer
//===----------------------------------------------------------------------===//
// Return a list of all instruction values in Fn. Returns true if we have at
// least two values to compare.
static bool gatherValues(SILFunction &Fn, std::vector<SILValue> &Values) {
for (auto &BB : Fn) {
for (auto *Arg : BB.getArguments())
Values.push_back(SILValue(Arg));
for (auto &II : BB)
for (auto result : II.getResults())
Values.push_back(result);
}
return Values.size() > 1;
}
//===----------------------------------------------------------------------===//
// Top Level Driver
//===----------------------------------------------------------------------===//
namespace {
/// Dumps the alias relations between all instructions of a function.
class SILAADumper : public SILModuleTransform {
void run() override {
for (auto &Fn: *getModule()) {
llvm::outs() << "@" << Fn.getName() << "\n";
// Gather up all Values in Fn.
std::vector<SILValue> Values;
if (!gatherValues(Fn, Values))
continue;
AliasAnalysis *AA = PM->getAnalysis<AliasAnalysis>(&Fn);
// A cache
llvm::DenseMap<uint64_t, AliasAnalysis::AliasResult> Results;
// Emit the N^2 alias evaluation of the values.
unsigned PairCount = 0;
for (unsigned i1 = 0, e1 = Values.size(); i1 != e1; ++i1) {
for (unsigned i2 = 0, e2 = Values.size(); i2 != e2; ++i2) {
auto V1 = Values[i1];
auto V2 = Values[i2];
auto Result =
AA->alias(V1, V2, computeTBAAType(V1), computeTBAAType(V2));
// Results should always be the same. But if they are different print
// it out so we find the error. This should make our test results less
// verbose.
uint64_t Key = uint64_t(i1) | (uint64_t(i2) << 32);
uint64_t OpKey = uint64_t(i2) | (uint64_t(i1) << 32);
auto R = Results.find(OpKey);
if (R != Results.end() && R->second == Result)
continue;
Results[Key] = Result;
llvm::outs() << "PAIR #" << PairCount++ << ".\n" << V1 << V2 << Result
<< "\n";
}
}
llvm::outs() << "\n";
}
}
};
} // end anonymous namespace
SILTransform *swift::createAADumper() { return new SILAADumper(); }
|
