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
|
///===- DroppedVariableStatsIR.cpp ----------------------------------------===//
///
/// 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
///
///===---------------------------------------------------------------------===//
/// \file
/// Dropped Variable Statistics for Debug Information. Reports any number
/// of #dbg_value that get dropped due to an optimization pass.
///
///===---------------------------------------------------------------------===//
#include "llvm/Passes/DroppedVariableStatsIR.h"
using namespace llvm;
void DroppedVariableStatsIR::runOnFunction(StringRef PassID, const Function *F,
bool Before) {
auto &DebugVariables = DebugVariablesStack.back()[F];
auto FuncName = F->getName();
Func = F;
run(DebugVariables, FuncName, Before);
}
void DroppedVariableStatsIR::calculateDroppedVarStatsOnFunction(
const Function *F, StringRef PassID, StringRef FuncOrModName,
StringRef PassLevel) {
Func = F;
StringRef FuncName = F->getName();
DebugVariables &DbgVariables = DebugVariablesStack.back()[F];
calculateDroppedStatsAndPrint(DbgVariables, FuncName, PassID, FuncOrModName,
PassLevel, Func);
}
void DroppedVariableStatsIR::runOnModule(StringRef PassID, const Module *M,
bool Before) {
for (auto &F : *M) {
runOnFunction(PassID, &F, Before);
}
}
void DroppedVariableStatsIR::calculateDroppedVarStatsOnModule(
const Module *M, StringRef PassID, StringRef FuncOrModName,
StringRef PassLevel) {
for (auto &F : *M) {
calculateDroppedVarStatsOnFunction(&F, PassID, FuncOrModName, PassLevel);
}
}
void DroppedVariableStatsIR::registerCallbacks(
PassInstrumentationCallbacks &PIC) {
if (!DroppedVariableStatsEnabled)
return;
PIC.registerBeforeNonSkippedPassCallback(
[this](StringRef P, Any IR) { return runBeforePass(P, IR); });
PIC.registerAfterPassCallback(
[this](StringRef P, Any IR, const PreservedAnalyses &PA) {
return runAfterPass(P, IR);
});
PIC.registerAfterPassInvalidatedCallback(
[this](StringRef P, const PreservedAnalyses &PA) { return cleanup(); });
}
void DroppedVariableStatsIR::visitEveryInstruction(
unsigned &DroppedCount, DenseMap<VarID, DILocation *> &InlinedAtsMap,
VarID Var) {
const DIScope *DbgValScope = std::get<0>(Var);
for (const auto &I : instructions(Func)) {
auto *DbgLoc = I.getDebugLoc().get();
if (!DbgLoc)
continue;
if (updateDroppedCount(DbgLoc, DbgLoc->getScope(), DbgValScope,
InlinedAtsMap, Var, DroppedCount))
break;
}
}
void DroppedVariableStatsIR::visitEveryDebugRecord(
DenseSet<VarID> &VarIDSet,
DenseMap<StringRef, DenseMap<VarID, DILocation *>> &InlinedAtsMap,
StringRef FuncName, bool Before) {
for (const auto &I : instructions(Func)) {
for (DbgRecord &DR : I.getDbgRecordRange()) {
if (auto *Dbg = dyn_cast<DbgVariableRecord>(&DR)) {
auto *DbgVar = Dbg->getVariable();
auto DbgLoc = DR.getDebugLoc();
populateVarIDSetAndInlinedMap(DbgVar, DbgLoc, VarIDSet, InlinedAtsMap,
FuncName, Before);
}
}
}
}
|
