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Revert "Try simplifying LexicalScopes ownership again."

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Speculatively reverting due to a suspicious failure on a Windows
buildbot.

This reverts commit 10c37a012e.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208131 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie 2014-05-06 21:07:17 +00:00
parent d2ba53bdaa
commit ccad744d4a
2 changed files with 144 additions and 149 deletions
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233
include/llvm/CodeGen/LexicalScopes.h
View File

@ -25,12 +25,12 @@
#include "llvm/IR/Metadata.h"
#include "llvm/IR/ValueHandle.h"
#include <utility>
#include <unordered_map>
namespace llvm {
class MachineInstr;
class MachineBasicBlock;
class MachineFunction;
class LexicalScope;
//===----------------------------------------------------------------------===//
/// InsnRange - This is used to track range of instructions with identical
@ -38,6 +38,121 @@ class MachineFunction;
///
typedef std::pair<const MachineInstr *, const MachineInstr *> InsnRange;
//===----------------------------------------------------------------------===//
/// LexicalScopes - This class provides interface to collect and use lexical
/// scoping information from machine instruction.
///
class LexicalScopes {
public:
LexicalScopes() : MF(nullptr), CurrentFnLexicalScope(nullptr) {}
~LexicalScopes();
/// initialize - Scan machine function and constuct lexical scope nest, resets
/// the instance if necessary.
void initialize(const MachineFunction &);
/// releaseMemory - release memory.
void reset();
/// empty - Return true if there is any lexical scope information available.
bool empty() { return CurrentFnLexicalScope == nullptr; }
/// isCurrentFunctionScope - Return true if given lexical scope represents
/// current function.
bool isCurrentFunctionScope(const LexicalScope *LS) {
return LS == CurrentFnLexicalScope;
}
/// getCurrentFunctionScope - Return lexical scope for the current function.
LexicalScope *getCurrentFunctionScope() const {
return CurrentFnLexicalScope;
}
/// getMachineBasicBlocks - Populate given set using machine basic blocks
/// which have machine instructions that belong to lexical scope identified by
/// DebugLoc.
void getMachineBasicBlocks(DebugLoc DL,
SmallPtrSet<const MachineBasicBlock *, 4> &MBBs);
/// dominates - Return true if DebugLoc's lexical scope dominates at least one
/// machine instruction's lexical scope in a given machine basic block.
bool dominates(DebugLoc DL, MachineBasicBlock *MBB);
/// findLexicalScope - Find lexical scope, either regular or inlined, for the
/// given DebugLoc. Return NULL if not found.
LexicalScope *findLexicalScope(DebugLoc DL);
/// getAbstractScopesList - Return a reference to list of abstract scopes.
ArrayRef<LexicalScope *> getAbstractScopesList() const {
return AbstractScopesList;
}
/// findAbstractScope - Find an abstract scope or return NULL.
LexicalScope *findAbstractScope(const MDNode *N) {
return AbstractScopeMap.lookup(N);
}
/// findInlinedScope - Find an inlined scope for the given DebugLoc or return
/// NULL.
LexicalScope *findInlinedScope(DebugLoc DL) {
return InlinedLexicalScopeMap.lookup(DL);
}
/// findLexicalScope - Find regular lexical scope or return NULL.
LexicalScope *findLexicalScope(const MDNode *N) {
return LexicalScopeMap.lookup(N);
}
/// dump - Print data structures to dbgs().
void dump();
private:
/// getOrCreateLexicalScope - Find lexical scope for the given DebugLoc. If
/// not available then create new lexical scope.
LexicalScope *getOrCreateLexicalScope(DebugLoc DL);
/// getOrCreateRegularScope - Find or create a regular lexical scope.
LexicalScope *getOrCreateRegularScope(MDNode *Scope);
/// getOrCreateInlinedScope - Find or create an inlined lexical scope.
LexicalScope *getOrCreateInlinedScope(MDNode *Scope, MDNode *InlinedAt);
/// getOrCreateAbstractScope - Find or create an abstract lexical scope.
LexicalScope *getOrCreateAbstractScope(const MDNode *N);
/// extractLexicalScopes - Extract instruction ranges for each lexical scopes
/// for the given machine function.
void extractLexicalScopes(SmallVectorImpl<InsnRange> &MIRanges,
DenseMap<const MachineInstr *, LexicalScope *> &M);
void constructScopeNest(LexicalScope *Scope);
void
assignInstructionRanges(SmallVectorImpl<InsnRange> &MIRanges,
DenseMap<const MachineInstr *, LexicalScope *> &M);
private:
const MachineFunction *MF;
/// LexicalScopeMap - Tracks the scopes in the current function. Owns the
/// contained LexicalScope*s.
DenseMap<const MDNode *, LexicalScope *> LexicalScopeMap;
/// InlinedLexicalScopeMap - Tracks inlined function scopes in current
/// function.
DenseMap<DebugLoc, LexicalScope *> InlinedLexicalScopeMap;
/// AbstractScopeMap - These scopes are not included LexicalScopeMap.
/// AbstractScopes owns its LexicalScope*s.
DenseMap<const MDNode *, LexicalScope *> AbstractScopeMap;
/// AbstractScopesList - Tracks abstract scopes constructed while processing
/// a function.
SmallVector<LexicalScope *, 4> AbstractScopesList;
/// CurrentFnLexicalScope - Top level scope for the current function.
///
LexicalScope *CurrentFnLexicalScope;
};
//===----------------------------------------------------------------------===//
/// LexicalScope - This class is used to track scope information.
///
@ -129,122 +244,6 @@ private:
// scope nesting.
};
//===----------------------------------------------------------------------===//
/// LexicalScopes - This class provides interface to collect and use lexical
/// scoping information from machine instruction.
///
class LexicalScopes {
public:
LexicalScopes() : MF(nullptr), CurrentFnLexicalScope(nullptr) {}
/// initialize - Scan machine function and constuct lexical scope nest, resets
/// the instance if necessary.
void initialize(const MachineFunction &);
/// releaseMemory - release memory.
void reset();
/// empty - Return true if there is any lexical scope information available.
bool empty() { return CurrentFnLexicalScope == nullptr; }
/// isCurrentFunctionScope - Return true if given lexical scope represents
/// current function.
bool isCurrentFunctionScope(const LexicalScope *LS) {
return LS == CurrentFnLexicalScope;
}
/// getCurrentFunctionScope - Return lexical scope for the current function.
LexicalScope *getCurrentFunctionScope() const {
return CurrentFnLexicalScope;
}
/// getMachineBasicBlocks - Populate given set using machine basic blocks
/// which have machine instructions that belong to lexical scope identified by
/// DebugLoc.
void getMachineBasicBlocks(DebugLoc DL,
SmallPtrSet<const MachineBasicBlock *, 4> &MBBs);
/// dominates - Return true if DebugLoc's lexical scope dominates at least one
/// machine instruction's lexical scope in a given machine basic block.
bool dominates(DebugLoc DL, MachineBasicBlock *MBB);
/// findLexicalScope - Find lexical scope, either regular or inlined, for the
/// given DebugLoc. Return NULL if not found.
LexicalScope *findLexicalScope(DebugLoc DL);
/// getAbstractScopesList - Return a reference to list of abstract scopes.
ArrayRef<LexicalScope *> getAbstractScopesList() const {
return AbstractScopesList;
}
/// findAbstractScope - Find an abstract scope or return null.
LexicalScope *findAbstractScope(const MDNode *N) {
auto I = AbstractScopeMap.find(N);
return I != AbstractScopeMap.end() ? &I->second : nullptr;
}
/// findInlinedScope - Find an inlined scope for the given DebugLoc or return
/// NULL.
LexicalScope *findInlinedScope(DebugLoc DL) {
return InlinedLexicalScopeMap.lookup(DL);
}
/// findLexicalScope - Find regular lexical scope or return null.
LexicalScope *findLexicalScope(const MDNode *N) {
auto I = LexicalScopeMap.find(N);
return I != LexicalScopeMap.end() ? &I->second : nullptr;
}
/// dump - Print data structures to dbgs().
void dump();
private:
/// getOrCreateLexicalScope - Find lexical scope for the given DebugLoc. If
/// not available then create new lexical scope.
LexicalScope *getOrCreateLexicalScope(DebugLoc DL);
/// getOrCreateRegularScope - Find or create a regular lexical scope.
LexicalScope *getOrCreateRegularScope(MDNode *Scope);
/// getOrCreateInlinedScope - Find or create an inlined lexical scope.
LexicalScope *getOrCreateInlinedScope(MDNode *Scope, MDNode *InlinedAt);
/// getOrCreateAbstractScope - Find or create an abstract lexical scope.
LexicalScope *getOrCreateAbstractScope(const MDNode *N);
/// extractLexicalScopes - Extract instruction ranges for each lexical scopes
/// for the given machine function.
void extractLexicalScopes(SmallVectorImpl<InsnRange> &MIRanges,
DenseMap<const MachineInstr *, LexicalScope *> &M);
void constructScopeNest(LexicalScope *Scope);
void
assignInstructionRanges(SmallVectorImpl<InsnRange> &MIRanges,
DenseMap<const MachineInstr *, LexicalScope *> &M);
private:
const MachineFunction *MF;
/// LexicalScopeMap - Tracks the scopes in the current function.
// Use an unordered_map to ensure value pointer validity over insertion.
std::unordered_map<const MDNode *, LexicalScope> LexicalScopeMap;
/// InlinedLexicalScopeMap - Tracks inlined function scopes in current
/// function.
DenseMap<DebugLoc, LexicalScope *> InlinedLexicalScopeMap;
/// AbstractScopeMap - These scopes are not included LexicalScopeMap.
// Use an unordered_map to ensure value pointer validity over insertion.
std::unordered_map<const MDNode *, LexicalScope> AbstractScopeMap;
/// AbstractScopesList - Tracks abstract scopes constructed while processing
/// a function.
SmallVector<LexicalScope *, 4> AbstractScopesList;
/// CurrentFnLexicalScope - Top level scope for the current function.
///
LexicalScope *CurrentFnLexicalScope;
};
} // end llvm namespace
#endif

60
lib/CodeGen/LexicalScopes.cpp
View File

@ -26,12 +26,15 @@ using namespace llvm;
#define DEBUG_TYPE "lexicalscopes"
/// ~LexicalScopes - final cleanup after ourselves.
LexicalScopes::~LexicalScopes() { reset(); }
/// reset - Reset the instance so that it's prepared for another function.
void LexicalScopes::reset() {
MF = nullptr;
CurrentFnLexicalScope = nullptr;
LexicalScopeMap.clear();
AbstractScopeMap.clear();
DeleteContainerSeconds(LexicalScopeMap);
DeleteContainerSeconds(AbstractScopeMap);
InlinedLexicalScopeMap.clear();
AbstractScopesList.clear();
}
@ -121,7 +124,7 @@ LexicalScope *LexicalScopes::findLexicalScope(DebugLoc DL) {
if (IA)
return InlinedLexicalScopeMap.lookup(DebugLoc::getFromDILocation(IA));
return findLexicalScope(Scope);
return LexicalScopeMap.lookup(Scope);
}
/// getOrCreateLexicalScope - Find lexical scope for the given DebugLoc. If
@ -149,40 +152,35 @@ LexicalScope *LexicalScopes::getOrCreateRegularScope(MDNode *Scope) {
D = DIDescriptor(Scope);
}
auto I = LexicalScopeMap.find(Scope);
if (I != LexicalScopeMap.end())
return &I->second;
LexicalScope *WScope = LexicalScopeMap.lookup(Scope);
if (WScope)
return WScope;
LexicalScope *Parent = nullptr;
if (D.isLexicalBlock())
Parent = getOrCreateLexicalScope(DebugLoc::getFromDILexicalBlock(Scope));
I = LexicalScopeMap.emplace(std::piecewise_construct,
std::forward_as_tuple(Scope),
std::forward_as_tuple(Parent, DIDescriptor(Scope),
nullptr, false)).first;
WScope = new LexicalScope(Parent, DIDescriptor(Scope), nullptr, false);
LexicalScopeMap.insert(std::make_pair(Scope, WScope));
if (!Parent && DIDescriptor(Scope).isSubprogram() &&
DISubprogram(Scope).describes(MF->getFunction()))
CurrentFnLexicalScope = &I->second;
CurrentFnLexicalScope = WScope;
return &I->second;
return WScope;
}
/// getOrCreateInlinedScope - Find or create an inlined lexical scope.
LexicalScope *LexicalScopes::getOrCreateInlinedScope(MDNode *Scope,
MDNode *InlinedAt) {
auto I = LexicalScopeMap.find(InlinedAt);
if (I != LexicalScopeMap.end())
return &I->second;
LexicalScope *InlinedScope = LexicalScopeMap.lookup(InlinedAt);
if (InlinedScope)
return InlinedScope;
DebugLoc InlinedLoc = DebugLoc::getFromDILocation(InlinedAt);
I = LexicalScopeMap.emplace(std::piecewise_construct,
std::forward_as_tuple(InlinedAt),
std::forward_as_tuple(
getOrCreateLexicalScope(InlinedLoc),
DIDescriptor(Scope), InlinedAt, false)).first;
InlinedLexicalScopeMap[InlinedLoc] = &I->second;
return &I->second;
InlinedScope = new LexicalScope(getOrCreateLexicalScope(InlinedLoc),
DIDescriptor(Scope), InlinedAt, false);
InlinedLexicalScopeMap[InlinedLoc] = InlinedScope;
LexicalScopeMap[InlinedAt] = InlinedScope;
return InlinedScope;
}
/// getOrCreateAbstractScope - Find or create an abstract lexical scope.
@ -192,9 +190,9 @@ LexicalScope *LexicalScopes::getOrCreateAbstractScope(const MDNode *N) {
DIDescriptor Scope(N);
if (Scope.isLexicalBlockFile())
Scope = DILexicalBlockFile(Scope).getScope();
auto I = AbstractScopeMap.find(N);
if (I != AbstractScopeMap.end())
return &I->second;
LexicalScope *AScope = AbstractScopeMap.lookup(N);
if (AScope)
return AScope;
LexicalScope *Parent = nullptr;
if (Scope.isLexicalBlock()) {
@ -202,13 +200,11 @@ LexicalScope *LexicalScopes::getOrCreateAbstractScope(const MDNode *N) {
DIDescriptor ParentDesc = DB.getContext();
Parent = getOrCreateAbstractScope(ParentDesc);
}
I = AbstractScopeMap.emplace(std::piecewise_construct,
std::forward_as_tuple(N),
std::forward_as_tuple(Parent, DIDescriptor(N),
nullptr, true)).first;
AScope = new LexicalScope(Parent, DIDescriptor(N), nullptr, true);
AbstractScopeMap[N] = AScope;
if (DIDescriptor(N).isSubprogram())
AbstractScopesList.push_back(&I->second);
return &I->second;
AbstractScopesList.push_back(AScope);
return AScope;
}
/// constructScopeNest