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-rw-r--r--include/llvm/CodeGen/LexicalScopes.h261
1 files changed, 132 insertions, 129 deletions
diff --git a/include/llvm/CodeGen/LexicalScopes.h b/include/llvm/CodeGen/LexicalScopes.h
index 26563a605574..036aea30a510 100644
--- a/include/llvm/CodeGen/LexicalScopes.h
+++ b/include/llvm/CodeGen/LexicalScopes.h
@@ -21,16 +21,17 @@
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/Metadata.h"
-#include "llvm/Support/DebugLoc.h"
-#include "llvm/Support/ValueHandle.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
@@ -39,37 +40,130 @@ class LexicalScope;
typedef std::pair<const MachineInstr *, const MachineInstr *> InsnRange;
//===----------------------------------------------------------------------===//
+/// LexicalScope - This class is used to track scope information.
+///
+class LexicalScope {
+
+public:
+ LexicalScope(LexicalScope *P, const MDNode *D, const MDNode *I, bool A)
+ : Parent(P), Desc(D), InlinedAtLocation(I), AbstractScope(A),
+ LastInsn(nullptr), FirstInsn(nullptr), DFSIn(0), DFSOut(0) {
+ if (Parent)
+ Parent->addChild(this);
+ }
+
+ // Accessors.
+ LexicalScope *getParent() const { return Parent; }
+ const MDNode *getDesc() const { return Desc; }
+ const MDNode *getInlinedAt() const { return InlinedAtLocation; }
+ const MDNode *getScopeNode() const { return Desc; }
+ bool isAbstractScope() const { return AbstractScope; }
+ SmallVectorImpl<LexicalScope *> &getChildren() { return Children; }
+ SmallVectorImpl<InsnRange> &getRanges() { return Ranges; }
+
+ /// addChild - Add a child scope.
+ void addChild(LexicalScope *S) { Children.push_back(S); }
+
+ /// openInsnRange - This scope covers instruction range starting from MI.
+ void openInsnRange(const MachineInstr *MI) {
+ if (!FirstInsn)
+ FirstInsn = MI;
+
+ if (Parent)
+ Parent->openInsnRange(MI);
+ }
+
+ /// extendInsnRange - Extend the current instruction range covered by
+ /// this scope.
+ void extendInsnRange(const MachineInstr *MI) {
+ assert(FirstInsn && "MI Range is not open!");
+ LastInsn = MI;
+ if (Parent)
+ Parent->extendInsnRange(MI);
+ }
+
+ /// closeInsnRange - Create a range based on FirstInsn and LastInsn collected
+ /// until now. This is used when a new scope is encountered while walking
+ /// machine instructions.
+ void closeInsnRange(LexicalScope *NewScope = nullptr) {
+ assert(LastInsn && "Last insn missing!");
+ Ranges.push_back(InsnRange(FirstInsn, LastInsn));
+ FirstInsn = nullptr;
+ LastInsn = nullptr;
+ // If Parent dominates NewScope then do not close Parent's instruction
+ // range.
+ if (Parent && (!NewScope || !Parent->dominates(NewScope)))
+ Parent->closeInsnRange(NewScope);
+ }
+
+ /// dominates - Return true if current scope dominates given lexical scope.
+ bool dominates(const LexicalScope *S) const {
+ if (S == this)
+ return true;
+ if (DFSIn < S->getDFSIn() && DFSOut > S->getDFSOut())
+ return true;
+ return false;
+ }
+
+ // Depth First Search support to walk and manipulate LexicalScope hierarchy.
+ unsigned getDFSOut() const { return DFSOut; }
+ void setDFSOut(unsigned O) { DFSOut = O; }
+ unsigned getDFSIn() const { return DFSIn; }
+ void setDFSIn(unsigned I) { DFSIn = I; }
+
+ /// dump - print lexical scope.
+ void dump(unsigned Indent = 0) const;
+
+private:
+ LexicalScope *Parent; // Parent to this scope.
+ AssertingVH<const MDNode> Desc; // Debug info descriptor.
+ AssertingVH<const MDNode> InlinedAtLocation; // Location at which this
+ // scope is inlined.
+ bool AbstractScope; // Abstract Scope
+ SmallVector<LexicalScope *, 4> Children; // Scopes defined in scope.
+ // Contents not owned.
+ SmallVector<InsnRange, 4> Ranges;
+
+ const MachineInstr *LastInsn; // Last instruction of this scope.
+ const MachineInstr *FirstInsn; // First instruction of this scope.
+ unsigned DFSIn, DFSOut; // In & Out Depth use to determine
+ // scope nesting.
+};
+
+//===----------------------------------------------------------------------===//
/// LexicalScopes - This class provides interface to collect and use lexical
/// scoping information from machine instruction.
///
class LexicalScopes {
public:
- LexicalScopes() : MF(NULL), CurrentFnLexicalScope(NULL) { }
- virtual ~LexicalScopes();
+ LexicalScopes() : MF(nullptr), CurrentFnLexicalScope(nullptr) {}
- /// initialize - Scan machine function and constuct lexical scope nest.
- virtual void initialize(const MachineFunction &);
+ /// initialize - Scan machine function and constuct lexical scope nest, resets
+ /// the instance if necessary.
+ void initialize(const MachineFunction &);
/// releaseMemory - release memory.
- virtual void releaseMemory();
-
+ void reset();
+
/// empty - Return true if there is any lexical scope information available.
- bool empty() { return CurrentFnLexicalScope == NULL; }
+ bool empty() { return CurrentFnLexicalScope == nullptr; }
- /// isCurrentFunctionScope - Return true if given lexical scope represents
+ /// isCurrentFunctionScope - Return true if given lexical scope represents
/// current function.
- bool isCurrentFunctionScope(const LexicalScope *LS) {
+ bool isCurrentFunctionScope(const LexicalScope *LS) {
return LS == CurrentFnLexicalScope;
}
/// getCurrentFunctionScope - Return lexical scope for the current function.
- LexicalScope *getCurrentFunctionScope() const { return CurrentFnLexicalScope;}
+ 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);
+ 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.
@@ -84,27 +178,29 @@ public:
return AbstractScopesList;
}
- /// findAbstractScope - Find an abstract scope or return NULL.
+ /// findAbstractScope - Find an abstract scope or return null.
LexicalScope *findAbstractScope(const MDNode *N) {
- return AbstractScopeMap.lookup(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);
- }
+ LexicalScope *findInlinedScope(DebugLoc DL);
- /// findLexicalScope - Find regular lexical scope or return NULL.
+ /// findLexicalScope - Find regular lexical scope or return null.
LexicalScope *findLexicalScope(const MDNode *N) {
- return LexicalScopeMap.lookup(N);
+ auto I = LexicalScopeMap.find(N);
+ return I != LexicalScopeMap.end() ? &I->second : nullptr;
}
/// dump - Print data structures to dbgs().
void dump();
-private:
+ /// getOrCreateAbstractScope - Find or create an abstract lexical scope.
+ LexicalScope *getOrCreateAbstractScope(const MDNode *N);
+private:
/// getOrCreateLexicalScope - Find lexical scope for the given DebugLoc. If
/// not available then create new lexical scope.
LexicalScope *getOrCreateLexicalScope(DebugLoc DL);
@@ -115,30 +211,31 @@ private:
/// 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);
+ 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;
+ /// 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;
+ /// InlinedLexicalScopeMap - Tracks inlined function scopes in current
+ /// function.
+ std::unordered_map<std::pair<const MDNode *, const MDNode *>, LexicalScope,
+ pair_hash<const MDNode *, const MDNode *>>
+ InlinedLexicalScopeMap;
- /// AbstractScopeMap - These scopes are not included LexicalScopeMap.
- /// AbstractScopes owns its LexicalScope*s.
- DenseMap<const MDNode *, LexicalScope *> AbstractScopeMap;
+ /// 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.
@@ -149,100 +246,6 @@ private:
LexicalScope *CurrentFnLexicalScope;
};
-//===----------------------------------------------------------------------===//
-/// LexicalScope - This class is used to track scope information.
-///
-class LexicalScope {
- virtual void anchor();
-
-public:
- LexicalScope(LexicalScope *P, const MDNode *D, const MDNode *I, bool A)
- : Parent(P), Desc(D), InlinedAtLocation(I), AbstractScope(A),
- LastInsn(0), FirstInsn(0), DFSIn(0), DFSOut(0) {
- if (Parent)
- Parent->addChild(this);
- }
-
- virtual ~LexicalScope() {}
-
- // Accessors.
- LexicalScope *getParent() const { return Parent; }
- const MDNode *getDesc() const { return Desc; }
- const MDNode *getInlinedAt() const { return InlinedAtLocation; }
- const MDNode *getScopeNode() const { return Desc; }
- bool isAbstractScope() const { return AbstractScope; }
- SmallVectorImpl<LexicalScope *> &getChildren() { return Children; }
- SmallVectorImpl<InsnRange> &getRanges() { return Ranges; }
-
- /// addChild - Add a child scope.
- void addChild(LexicalScope *S) { Children.push_back(S); }
-
- /// openInsnRange - This scope covers instruction range starting from MI.
- void openInsnRange(const MachineInstr *MI) {
- if (!FirstInsn)
- FirstInsn = MI;
-
- if (Parent)
- Parent->openInsnRange(MI);
- }
-
- /// extendInsnRange - Extend the current instruction range covered by
- /// this scope.
- void extendInsnRange(const MachineInstr *MI) {
- assert (FirstInsn && "MI Range is not open!");
- LastInsn = MI;
- if (Parent)
- Parent->extendInsnRange(MI);
- }
-
- /// closeInsnRange - Create a range based on FirstInsn and LastInsn collected
- /// until now. This is used when a new scope is encountered while walking
- /// machine instructions.
- void closeInsnRange(LexicalScope *NewScope = NULL) {
- assert (LastInsn && "Last insn missing!");
- Ranges.push_back(InsnRange(FirstInsn, LastInsn));
- FirstInsn = NULL;
- LastInsn = NULL;
- // If Parent dominates NewScope then do not close Parent's instruction
- // range.
- if (Parent && (!NewScope || !Parent->dominates(NewScope)))
- Parent->closeInsnRange(NewScope);
- }
-
- /// dominates - Return true if current scope dominates given lexical scope.
- bool dominates(const LexicalScope *S) const {
- if (S == this)
- return true;
- if (DFSIn < S->getDFSIn() && DFSOut > S->getDFSOut())
- return true;
- return false;
- }
-
- // Depth First Search support to walk and manipulate LexicalScope hierarchy.
- unsigned getDFSOut() const { return DFSOut; }
- void setDFSOut(unsigned O) { DFSOut = O; }
- unsigned getDFSIn() const { return DFSIn; }
- void setDFSIn(unsigned I) { DFSIn = I; }
-
- /// dump - print lexical scope.
- void dump(unsigned Indent = 0) const;
-
-private:
- LexicalScope *Parent; // Parent to this scope.
- AssertingVH<const MDNode> Desc; // Debug info descriptor.
- AssertingVH<const MDNode> InlinedAtLocation; // Location at which this
- // scope is inlined.
- bool AbstractScope; // Abstract Scope
- SmallVector<LexicalScope *, 4> Children; // Scopes defined in scope.
- // Contents not owned.
- SmallVector<InsnRange, 4> Ranges;
-
- const MachineInstr *LastInsn; // Last instruction of this scope.
- const MachineInstr *FirstInsn; // First instruction of this scope.
- unsigned DFSIn, DFSOut; // In & Out Depth use to determine
- // scope nesting.
-};
-
} // end llvm namespace
#endif
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