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
|
//===- PassManager.cpp - Infrastructure for managing & running IR passes --===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/PassManager.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/PassManagerImpl.h"
using namespace llvm;
// Explicit template instantiations and specialization defininitions for core
// template typedefs.
namespace llvm {
template class AllAnalysesOn<Module>;
template class AllAnalysesOn<Function>;
template class PassManager<Module>;
template class PassManager<Function>;
template class AnalysisManager<Module>;
template class AnalysisManager<Function>;
template class InnerAnalysisManagerProxy<FunctionAnalysisManager, Module>;
template class OuterAnalysisManagerProxy<ModuleAnalysisManager, Function>;
template <>
bool FunctionAnalysisManagerModuleProxy::Result::invalidate(
Module &M, const PreservedAnalyses &PA,
ModuleAnalysisManager::Invalidator &Inv) {
// If literally everything is preserved, we're done.
if (PA.areAllPreserved())
return false; // This is still a valid proxy.
// If this proxy isn't marked as preserved, then even if the result remains
// valid, the key itself may no longer be valid, so we clear everything.
//
// Note that in order to preserve this proxy, a module pass must ensure that
// the FAM has been completely updated to handle the deletion of functions.
// Specifically, any FAM-cached results for those functions need to have been
// forcibly cleared. When preserved, this proxy will only invalidate results
// cached on functions *still in the module* at the end of the module pass.
auto PAC = PA.getChecker<FunctionAnalysisManagerModuleProxy>();
if (!PAC.preserved() && !PAC.preservedSet<AllAnalysesOn<Module>>()) {
InnerAM->clear();
return true;
}
// Directly check if the relevant set is preserved.
bool AreFunctionAnalysesPreserved =
PA.allAnalysesInSetPreserved<AllAnalysesOn<Function>>();
// Now walk all the functions to see if any inner analysis invalidation is
// necessary.
for (Function &F : M) {
Optional<PreservedAnalyses> FunctionPA;
// Check to see whether the preserved set needs to be pruned based on
// module-level analysis invalidation that triggers deferred invalidation
// registered with the outer analysis manager proxy for this function.
if (auto *OuterProxy =
InnerAM->getCachedResult<ModuleAnalysisManagerFunctionProxy>(F))
for (const auto &OuterInvalidationPair :
OuterProxy->getOuterInvalidations()) {
AnalysisKey *OuterAnalysisID = OuterInvalidationPair.first;
const auto &InnerAnalysisIDs = OuterInvalidationPair.second;
if (Inv.invalidate(OuterAnalysisID, M, PA)) {
if (!FunctionPA)
FunctionPA = PA;
for (AnalysisKey *InnerAnalysisID : InnerAnalysisIDs)
FunctionPA->abandon(InnerAnalysisID);
}
}
// Check if we needed a custom PA set, and if so we'll need to run the
// inner invalidation.
if (FunctionPA) {
InnerAM->invalidate(F, *FunctionPA);
continue;
}
// Otherwise we only need to do invalidation if the original PA set didn't
// preserve all function analyses.
if (!AreFunctionAnalysesPreserved)
InnerAM->invalidate(F, PA);
}
// Return false to indicate that this result is still a valid proxy.
return false;
}
} // namespace llvm
PreservedAnalyses ModuleToFunctionPassAdaptor::run(Module &M,
ModuleAnalysisManager &AM) {
FunctionAnalysisManager &FAM =
AM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
// Request PassInstrumentation from analysis manager, will use it to run
// instrumenting callbacks for the passes later.
PassInstrumentation PI = AM.getResult<PassInstrumentationAnalysis>(M);
PreservedAnalyses PA = PreservedAnalyses::all();
for (Function &F : M) {
if (F.isDeclaration())
continue;
// Check the PassInstrumentation's BeforePass callbacks before running the
// pass, skip its execution completely if asked to (callback returns
// false).
if (!PI.runBeforePass<Function>(*Pass, F))
continue;
PreservedAnalyses PassPA;
{
TimeTraceScope TimeScope(Pass->name(), F.getName());
PassPA = Pass->run(F, FAM);
}
PI.runAfterPass(*Pass, F, PassPA);
// We know that the function pass couldn't have invalidated any other
// function's analyses (that's the contract of a function pass), so
// directly handle the function analysis manager's invalidation here.
FAM.invalidate(F, PassPA);
// Then intersect the preserved set so that invalidation of module
// analyses will eventually occur when the module pass completes.
PA.intersect(std::move(PassPA));
}
// The FunctionAnalysisManagerModuleProxy is preserved because (we assume)
// the function passes we ran didn't add or remove any functions.
//
// We also preserve all analyses on Functions, because we did all the
// invalidation we needed to do above.
PA.preserveSet<AllAnalysesOn<Function>>();
PA.preserve<FunctionAnalysisManagerModuleProxy>();
return PA;
}
AnalysisSetKey CFGAnalyses::SetKey;
AnalysisSetKey PreservedAnalyses::AllAnalysesKey;
|
