1 //===-- DebugLoc.cpp - Implement DebugLoc class ---------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/Support/DebugLoc.h"
11 #include "llvm/DebugInfo.h"
12 #include "llvm/ADT/DenseMapInfo.h"
13 #include "LLVMContextImpl.h"
16 //===----------------------------------------------------------------------===//
17 // DebugLoc Implementation
18 //===----------------------------------------------------------------------===//
20 MDNode *DebugLoc::getScope(const LLVMContext &Ctx) const {
21 if (ScopeIdx == 0) return 0;
24 // Positive ScopeIdx is an index into ScopeRecords, which has no inlined-at
25 // position specified.
26 assert(unsigned(ScopeIdx) <= Ctx.pImpl->ScopeRecords.size() &&
28 return Ctx.pImpl->ScopeRecords[ScopeIdx-1].get();
31 // Otherwise, the index is in the ScopeInlinedAtRecords array.
32 assert(unsigned(-ScopeIdx) <= Ctx.pImpl->ScopeInlinedAtRecords.size() &&
34 return Ctx.pImpl->ScopeInlinedAtRecords[-ScopeIdx-1].first.get();
37 MDNode *DebugLoc::getInlinedAt(const LLVMContext &Ctx) const {
38 // Positive ScopeIdx is an index into ScopeRecords, which has no inlined-at
39 // position specified. Zero is invalid.
40 if (ScopeIdx >= 0) return 0;
42 // Otherwise, the index is in the ScopeInlinedAtRecords array.
43 assert(unsigned(-ScopeIdx) <= Ctx.pImpl->ScopeInlinedAtRecords.size() &&
45 return Ctx.pImpl->ScopeInlinedAtRecords[-ScopeIdx-1].second.get();
48 /// Return both the Scope and the InlinedAt values.
49 void DebugLoc::getScopeAndInlinedAt(MDNode *&Scope, MDNode *&IA,
50 const LLVMContext &Ctx) const {
57 // Positive ScopeIdx is an index into ScopeRecords, which has no inlined-at
58 // position specified.
59 assert(unsigned(ScopeIdx) <= Ctx.pImpl->ScopeRecords.size() &&
61 Scope = Ctx.pImpl->ScopeRecords[ScopeIdx-1].get();
66 // Otherwise, the index is in the ScopeInlinedAtRecords array.
67 assert(unsigned(-ScopeIdx) <= Ctx.pImpl->ScopeInlinedAtRecords.size() &&
69 Scope = Ctx.pImpl->ScopeInlinedAtRecords[-ScopeIdx-1].first.get();
70 IA = Ctx.pImpl->ScopeInlinedAtRecords[-ScopeIdx-1].second.get();
74 DebugLoc DebugLoc::get(unsigned Line, unsigned Col,
75 MDNode *Scope, MDNode *InlinedAt) {
78 // If no scope is available, this is an unknown location.
79 if (Scope == 0) return Result;
81 // Saturate line and col to "unknown".
82 if (Col > 255) Col = 0;
83 if (Line >= (1 << 24)) Line = 0;
84 Result.LineCol = Line | (Col << 24);
86 LLVMContext &Ctx = Scope->getContext();
88 // If there is no inlined-at location, use the ScopeRecords array.
90 Result.ScopeIdx = Ctx.pImpl->getOrAddScopeRecordIdxEntry(Scope, 0);
92 Result.ScopeIdx = Ctx.pImpl->getOrAddScopeInlinedAtIdxEntry(Scope,
98 /// getAsMDNode - This method converts the compressed DebugLoc node into a
99 /// DILocation compatible MDNode.
100 MDNode *DebugLoc::getAsMDNode(const LLVMContext &Ctx) const {
101 if (isUnknown()) return 0;
104 getScopeAndInlinedAt(Scope, IA, Ctx);
105 assert(Scope && "If scope is null, this should be isUnknown()");
107 LLVMContext &Ctx2 = Scope->getContext();
108 Type *Int32 = Type::getInt32Ty(Ctx2);
110 ConstantInt::get(Int32, getLine()), ConstantInt::get(Int32, getCol()),
113 return MDNode::get(Ctx2, Elts);
116 /// getFromDILocation - Translate the DILocation quad into a DebugLoc.
117 DebugLoc DebugLoc::getFromDILocation(MDNode *N) {
119 MDNode *Scope = Loc.getScope();
120 if (Scope == 0) return DebugLoc();
121 return get(Loc.getLineNumber(), Loc.getColumnNumber(), Scope,
122 Loc.getOrigLocation());
125 /// getFromDILexicalBlock - Translate the DILexicalBlock into a DebugLoc.
126 DebugLoc DebugLoc::getFromDILexicalBlock(MDNode *N) {
127 DILexicalBlock LexBlock(N);
128 MDNode *Scope = LexBlock.getContext();
129 if (Scope == 0) return DebugLoc();
130 return get(LexBlock.getLineNumber(), LexBlock.getColumnNumber(), Scope, NULL);
133 void DebugLoc::dump(const LLVMContext &Ctx) const {
138 dbgs() << ',' << getCol();
139 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(getInlinedAt(Ctx));
140 if (!InlinedAtDL.isUnknown()) {
142 InlinedAtDL.dump(Ctx);
149 //===----------------------------------------------------------------------===//
150 // DenseMap specialization
151 //===----------------------------------------------------------------------===//
153 DebugLoc DenseMapInfo<DebugLoc>::getEmptyKey() {
154 return DebugLoc::getEmptyKey();
157 DebugLoc DenseMapInfo<DebugLoc>::getTombstoneKey() {
158 return DebugLoc::getTombstoneKey();
161 unsigned DenseMapInfo<DebugLoc>::getHashValue(const DebugLoc &Key) {
162 return static_cast<unsigned>(hash_combine(Key.LineCol, Key.ScopeIdx));
165 bool DenseMapInfo<DebugLoc>::isEqual(const DebugLoc &LHS, const DebugLoc &RHS) {
169 //===----------------------------------------------------------------------===//
170 // LLVMContextImpl Implementation
171 //===----------------------------------------------------------------------===//
173 int LLVMContextImpl::getOrAddScopeRecordIdxEntry(MDNode *Scope,
175 // If we already have an entry for this scope, return it.
176 int &Idx = ScopeRecordIdx[Scope];
179 // If we don't have an entry, but ExistingIdx is specified, use it.
181 return Idx = ExistingIdx;
183 // Otherwise add a new entry.
185 // Start out ScopeRecords with a minimal reasonable size to avoid
186 // excessive reallocation starting out.
187 if (ScopeRecords.empty())
188 ScopeRecords.reserve(128);
190 // Index is biased by 1 for index.
191 Idx = ScopeRecords.size()+1;
192 ScopeRecords.push_back(DebugRecVH(Scope, this, Idx));
196 int LLVMContextImpl::getOrAddScopeInlinedAtIdxEntry(MDNode *Scope, MDNode *IA,
198 // If we already have an entry, return it.
199 int &Idx = ScopeInlinedAtIdx[std::make_pair(Scope, IA)];
202 // If we don't have an entry, but ExistingIdx is specified, use it.
204 return Idx = ExistingIdx;
206 // Start out ScopeInlinedAtRecords with a minimal reasonable size to avoid
207 // excessive reallocation starting out.
208 if (ScopeInlinedAtRecords.empty())
209 ScopeInlinedAtRecords.reserve(128);
211 // Index is biased by 1 and negated.
212 Idx = -ScopeInlinedAtRecords.size()-1;
213 ScopeInlinedAtRecords.push_back(std::make_pair(DebugRecVH(Scope, this, Idx),
214 DebugRecVH(IA, this, Idx)));
219 //===----------------------------------------------------------------------===//
220 // DebugRecVH Implementation
221 //===----------------------------------------------------------------------===//
223 /// deleted - The MDNode this is pointing to got deleted, so this pointer needs
224 /// to drop to null and we need remove our entry from the DenseMap.
225 void DebugRecVH::deleted() {
226 // If this is a non-canonical reference, just drop the value to null, we know
227 // it doesn't have a map entry.
235 // If the index is positive, it is an entry in ScopeRecords.
237 assert(Ctx->ScopeRecordIdx[Cur] == Idx && "Mapping out of date!");
238 Ctx->ScopeRecordIdx.erase(Cur);
239 // Reset this VH to null and we're done.
245 // Otherwise, it is an entry in ScopeInlinedAtRecords, we don't know if it
246 // is the scope or the inlined-at record entry.
247 assert(unsigned(-Idx-1) < Ctx->ScopeInlinedAtRecords.size());
248 std::pair<DebugRecVH, DebugRecVH> &Entry = Ctx->ScopeInlinedAtRecords[-Idx-1];
249 assert((this == &Entry.first || this == &Entry.second) &&
250 "Mapping out of date!");
252 MDNode *OldScope = Entry.first.get();
253 MDNode *OldInlinedAt = Entry.second.get();
254 assert(OldScope != 0 && OldInlinedAt != 0 &&
255 "Entry should be non-canonical if either val dropped to null");
257 // Otherwise, we do have an entry in it, nuke it and we're done.
258 assert(Ctx->ScopeInlinedAtIdx[std::make_pair(OldScope, OldInlinedAt)] == Idx&&
259 "Mapping out of date");
260 Ctx->ScopeInlinedAtIdx.erase(std::make_pair(OldScope, OldInlinedAt));
262 // Reset this VH to null. Drop both 'Idx' values to null to indicate that
263 // we're in non-canonical form now.
265 Entry.first.Idx = Entry.second.Idx = 0;
268 void DebugRecVH::allUsesReplacedWith(Value *NewVa) {
269 // If being replaced with a non-mdnode value (e.g. undef) handle this as if
270 // the mdnode got deleted.
271 MDNode *NewVal = dyn_cast<MDNode>(NewVa);
272 if (NewVal == 0) return deleted();
274 // If this is a non-canonical reference, just change it, we know it already
275 // doesn't have a map entry.
281 MDNode *OldVal = get();
282 assert(OldVal != NewVa && "Node replaced with self?");
284 // If the index is positive, it is an entry in ScopeRecords.
286 assert(Ctx->ScopeRecordIdx[OldVal] == Idx && "Mapping out of date!");
287 Ctx->ScopeRecordIdx.erase(OldVal);
290 int NewEntry = Ctx->getOrAddScopeRecordIdxEntry(NewVal, Idx);
292 // If NewVal already has an entry, this becomes a non-canonical reference,
293 // just drop Idx to 0 to signify this.
299 // Otherwise, it is an entry in ScopeInlinedAtRecords, we don't know if it
300 // is the scope or the inlined-at record entry.
301 assert(unsigned(-Idx-1) < Ctx->ScopeInlinedAtRecords.size());
302 std::pair<DebugRecVH, DebugRecVH> &Entry = Ctx->ScopeInlinedAtRecords[-Idx-1];
303 assert((this == &Entry.first || this == &Entry.second) &&
304 "Mapping out of date!");
306 MDNode *OldScope = Entry.first.get();
307 MDNode *OldInlinedAt = Entry.second.get();
308 assert(OldScope != 0 && OldInlinedAt != 0 &&
309 "Entry should be non-canonical if either val dropped to null");
311 // Otherwise, we do have an entry in it, nuke it and we're done.
312 assert(Ctx->ScopeInlinedAtIdx[std::make_pair(OldScope, OldInlinedAt)] == Idx&&
313 "Mapping out of date");
314 Ctx->ScopeInlinedAtIdx.erase(std::make_pair(OldScope, OldInlinedAt));
316 // Reset this VH to the new value.
319 int NewIdx = Ctx->getOrAddScopeInlinedAtIdxEntry(Entry.first.get(),
320 Entry.second.get(), Idx);
321 // If NewVal already has an entry, this becomes a non-canonical reference,
322 // just drop Idx to 0 to signify this.
324 std::pair<DebugRecVH, DebugRecVH> &Entry=Ctx->ScopeInlinedAtRecords[-Idx-1];
325 Entry.first.Idx = Entry.second.Idx = 0;