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c2c50cdcdc
Aside from moving the actual files, this patch only updates the build system and the source file comments under lib/... that are relevant. I'll be updating other docs and other files in smaller subsequnet commits. While I've tried to test this, but it is entirely possible that there will still be some build system fallout. Also, note that I've not changed the library name itself: libLLVMCore.a is still the library name. I'd be interested in others' opinions about whether we should rename this as well (I think we should, just not sure what it might break) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171359 91177308-0d34-0410-b5e6-96231b3b80d8
316 lines
11 KiB
C++
316 lines
11 KiB
C++
//===-- DebugLoc.cpp - Implement DebugLoc class ---------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/DebugLoc.h"
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#include "LLVMContextImpl.h"
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#include "llvm/ADT/DenseMapInfo.h"
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#include "llvm/DebugInfo.h"
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// DebugLoc Implementation
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//===----------------------------------------------------------------------===//
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MDNode *DebugLoc::getScope(const LLVMContext &Ctx) const {
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if (ScopeIdx == 0) return 0;
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if (ScopeIdx > 0) {
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// Positive ScopeIdx is an index into ScopeRecords, which has no inlined-at
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// position specified.
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assert(unsigned(ScopeIdx) <= Ctx.pImpl->ScopeRecords.size() &&
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"Invalid ScopeIdx!");
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return Ctx.pImpl->ScopeRecords[ScopeIdx-1].get();
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}
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// Otherwise, the index is in the ScopeInlinedAtRecords array.
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assert(unsigned(-ScopeIdx) <= Ctx.pImpl->ScopeInlinedAtRecords.size() &&
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"Invalid ScopeIdx");
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return Ctx.pImpl->ScopeInlinedAtRecords[-ScopeIdx-1].first.get();
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}
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MDNode *DebugLoc::getInlinedAt(const LLVMContext &Ctx) const {
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// Positive ScopeIdx is an index into ScopeRecords, which has no inlined-at
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// position specified. Zero is invalid.
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if (ScopeIdx >= 0) return 0;
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// Otherwise, the index is in the ScopeInlinedAtRecords array.
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assert(unsigned(-ScopeIdx) <= Ctx.pImpl->ScopeInlinedAtRecords.size() &&
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"Invalid ScopeIdx");
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return Ctx.pImpl->ScopeInlinedAtRecords[-ScopeIdx-1].second.get();
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}
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/// Return both the Scope and the InlinedAt values.
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void DebugLoc::getScopeAndInlinedAt(MDNode *&Scope, MDNode *&IA,
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const LLVMContext &Ctx) const {
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if (ScopeIdx == 0) {
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Scope = IA = 0;
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return;
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}
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if (ScopeIdx > 0) {
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// Positive ScopeIdx is an index into ScopeRecords, which has no inlined-at
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// position specified.
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assert(unsigned(ScopeIdx) <= Ctx.pImpl->ScopeRecords.size() &&
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"Invalid ScopeIdx!");
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Scope = Ctx.pImpl->ScopeRecords[ScopeIdx-1].get();
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IA = 0;
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return;
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}
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// Otherwise, the index is in the ScopeInlinedAtRecords array.
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assert(unsigned(-ScopeIdx) <= Ctx.pImpl->ScopeInlinedAtRecords.size() &&
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"Invalid ScopeIdx");
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Scope = Ctx.pImpl->ScopeInlinedAtRecords[-ScopeIdx-1].first.get();
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IA = Ctx.pImpl->ScopeInlinedAtRecords[-ScopeIdx-1].second.get();
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}
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DebugLoc DebugLoc::get(unsigned Line, unsigned Col,
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MDNode *Scope, MDNode *InlinedAt) {
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DebugLoc Result;
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// If no scope is available, this is an unknown location.
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if (Scope == 0) return Result;
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// Saturate line and col to "unknown".
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if (Col > 255) Col = 0;
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if (Line >= (1 << 24)) Line = 0;
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Result.LineCol = Line | (Col << 24);
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LLVMContext &Ctx = Scope->getContext();
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// If there is no inlined-at location, use the ScopeRecords array.
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if (InlinedAt == 0)
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Result.ScopeIdx = Ctx.pImpl->getOrAddScopeRecordIdxEntry(Scope, 0);
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else
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Result.ScopeIdx = Ctx.pImpl->getOrAddScopeInlinedAtIdxEntry(Scope,
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InlinedAt, 0);
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return Result;
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}
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/// getAsMDNode - This method converts the compressed DebugLoc node into a
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/// DILocation compatible MDNode.
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MDNode *DebugLoc::getAsMDNode(const LLVMContext &Ctx) const {
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if (isUnknown()) return 0;
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MDNode *Scope, *IA;
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getScopeAndInlinedAt(Scope, IA, Ctx);
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assert(Scope && "If scope is null, this should be isUnknown()");
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LLVMContext &Ctx2 = Scope->getContext();
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Type *Int32 = Type::getInt32Ty(Ctx2);
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Value *Elts[] = {
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ConstantInt::get(Int32, getLine()), ConstantInt::get(Int32, getCol()),
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Scope, IA
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};
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return MDNode::get(Ctx2, Elts);
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}
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/// getFromDILocation - Translate the DILocation quad into a DebugLoc.
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DebugLoc DebugLoc::getFromDILocation(MDNode *N) {
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DILocation Loc(N);
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MDNode *Scope = Loc.getScope();
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if (Scope == 0) return DebugLoc();
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return get(Loc.getLineNumber(), Loc.getColumnNumber(), Scope,
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Loc.getOrigLocation());
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}
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/// getFromDILexicalBlock - Translate the DILexicalBlock into a DebugLoc.
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DebugLoc DebugLoc::getFromDILexicalBlock(MDNode *N) {
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DILexicalBlock LexBlock(N);
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MDNode *Scope = LexBlock.getContext();
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if (Scope == 0) return DebugLoc();
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return get(LexBlock.getLineNumber(), LexBlock.getColumnNumber(), Scope, NULL);
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}
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void DebugLoc::dump(const LLVMContext &Ctx) const {
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#ifndef NDEBUG
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if (!isUnknown()) {
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dbgs() << getLine();
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if (getCol() != 0)
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dbgs() << ',' << getCol();
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DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(getInlinedAt(Ctx));
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if (!InlinedAtDL.isUnknown()) {
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dbgs() << " @ ";
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InlinedAtDL.dump(Ctx);
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} else
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dbgs() << "\n";
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}
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#endif
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}
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//===----------------------------------------------------------------------===//
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// DenseMap specialization
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//===----------------------------------------------------------------------===//
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unsigned DenseMapInfo<DebugLoc>::getHashValue(const DebugLoc &Key) {
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return static_cast<unsigned>(hash_combine(Key.LineCol, Key.ScopeIdx));
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}
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//===----------------------------------------------------------------------===//
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// LLVMContextImpl Implementation
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//===----------------------------------------------------------------------===//
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int LLVMContextImpl::getOrAddScopeRecordIdxEntry(MDNode *Scope,
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int ExistingIdx) {
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// If we already have an entry for this scope, return it.
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int &Idx = ScopeRecordIdx[Scope];
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if (Idx) return Idx;
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// If we don't have an entry, but ExistingIdx is specified, use it.
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if (ExistingIdx)
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return Idx = ExistingIdx;
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// Otherwise add a new entry.
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// Start out ScopeRecords with a minimal reasonable size to avoid
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// excessive reallocation starting out.
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if (ScopeRecords.empty())
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ScopeRecords.reserve(128);
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// Index is biased by 1 for index.
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Idx = ScopeRecords.size()+1;
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ScopeRecords.push_back(DebugRecVH(Scope, this, Idx));
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return Idx;
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}
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int LLVMContextImpl::getOrAddScopeInlinedAtIdxEntry(MDNode *Scope, MDNode *IA,
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int ExistingIdx) {
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// If we already have an entry, return it.
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int &Idx = ScopeInlinedAtIdx[std::make_pair(Scope, IA)];
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if (Idx) return Idx;
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// If we don't have an entry, but ExistingIdx is specified, use it.
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if (ExistingIdx)
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return Idx = ExistingIdx;
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// Start out ScopeInlinedAtRecords with a minimal reasonable size to avoid
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// excessive reallocation starting out.
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if (ScopeInlinedAtRecords.empty())
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ScopeInlinedAtRecords.reserve(128);
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// Index is biased by 1 and negated.
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Idx = -ScopeInlinedAtRecords.size()-1;
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ScopeInlinedAtRecords.push_back(std::make_pair(DebugRecVH(Scope, this, Idx),
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DebugRecVH(IA, this, Idx)));
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return Idx;
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}
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//===----------------------------------------------------------------------===//
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// DebugRecVH Implementation
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//===----------------------------------------------------------------------===//
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/// deleted - The MDNode this is pointing to got deleted, so this pointer needs
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/// to drop to null and we need remove our entry from the DenseMap.
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void DebugRecVH::deleted() {
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// If this is a non-canonical reference, just drop the value to null, we know
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// it doesn't have a map entry.
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if (Idx == 0) {
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setValPtr(0);
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return;
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}
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MDNode *Cur = get();
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// If the index is positive, it is an entry in ScopeRecords.
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if (Idx > 0) {
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assert(Ctx->ScopeRecordIdx[Cur] == Idx && "Mapping out of date!");
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Ctx->ScopeRecordIdx.erase(Cur);
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// Reset this VH to null and we're done.
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setValPtr(0);
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Idx = 0;
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return;
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}
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// Otherwise, it is an entry in ScopeInlinedAtRecords, we don't know if it
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// is the scope or the inlined-at record entry.
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assert(unsigned(-Idx-1) < Ctx->ScopeInlinedAtRecords.size());
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std::pair<DebugRecVH, DebugRecVH> &Entry = Ctx->ScopeInlinedAtRecords[-Idx-1];
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assert((this == &Entry.first || this == &Entry.second) &&
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"Mapping out of date!");
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MDNode *OldScope = Entry.first.get();
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MDNode *OldInlinedAt = Entry.second.get();
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assert(OldScope != 0 && OldInlinedAt != 0 &&
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"Entry should be non-canonical if either val dropped to null");
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// Otherwise, we do have an entry in it, nuke it and we're done.
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assert(Ctx->ScopeInlinedAtIdx[std::make_pair(OldScope, OldInlinedAt)] == Idx&&
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"Mapping out of date");
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Ctx->ScopeInlinedAtIdx.erase(std::make_pair(OldScope, OldInlinedAt));
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// Reset this VH to null. Drop both 'Idx' values to null to indicate that
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// we're in non-canonical form now.
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setValPtr(0);
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Entry.first.Idx = Entry.second.Idx = 0;
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}
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void DebugRecVH::allUsesReplacedWith(Value *NewVa) {
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// If being replaced with a non-mdnode value (e.g. undef) handle this as if
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// the mdnode got deleted.
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MDNode *NewVal = dyn_cast<MDNode>(NewVa);
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if (NewVal == 0) return deleted();
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// If this is a non-canonical reference, just change it, we know it already
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// doesn't have a map entry.
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if (Idx == 0) {
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setValPtr(NewVa);
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return;
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}
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MDNode *OldVal = get();
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assert(OldVal != NewVa && "Node replaced with self?");
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// If the index is positive, it is an entry in ScopeRecords.
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if (Idx > 0) {
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assert(Ctx->ScopeRecordIdx[OldVal] == Idx && "Mapping out of date!");
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Ctx->ScopeRecordIdx.erase(OldVal);
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setValPtr(NewVal);
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int NewEntry = Ctx->getOrAddScopeRecordIdxEntry(NewVal, Idx);
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// If NewVal already has an entry, this becomes a non-canonical reference,
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// just drop Idx to 0 to signify this.
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if (NewEntry != Idx)
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Idx = 0;
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return;
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}
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// Otherwise, it is an entry in ScopeInlinedAtRecords, we don't know if it
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// is the scope or the inlined-at record entry.
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assert(unsigned(-Idx-1) < Ctx->ScopeInlinedAtRecords.size());
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std::pair<DebugRecVH, DebugRecVH> &Entry = Ctx->ScopeInlinedAtRecords[-Idx-1];
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assert((this == &Entry.first || this == &Entry.second) &&
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"Mapping out of date!");
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MDNode *OldScope = Entry.first.get();
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MDNode *OldInlinedAt = Entry.second.get();
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assert(OldScope != 0 && OldInlinedAt != 0 &&
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"Entry should be non-canonical if either val dropped to null");
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// Otherwise, we do have an entry in it, nuke it and we're done.
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assert(Ctx->ScopeInlinedAtIdx[std::make_pair(OldScope, OldInlinedAt)] == Idx&&
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"Mapping out of date");
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Ctx->ScopeInlinedAtIdx.erase(std::make_pair(OldScope, OldInlinedAt));
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// Reset this VH to the new value.
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setValPtr(NewVal);
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int NewIdx = Ctx->getOrAddScopeInlinedAtIdxEntry(Entry.first.get(),
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Entry.second.get(), Idx);
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// If NewVal already has an entry, this becomes a non-canonical reference,
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// just drop Idx to 0 to signify this.
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if (NewIdx != Idx) {
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std::pair<DebugRecVH, DebugRecVH> &Entry=Ctx->ScopeInlinedAtRecords[-Idx-1];
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Entry.first.Idx = Entry.second.Idx = 0;
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}
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}
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