ARM64: Combine shifts and uses from different basic block to bit-extract instruction

[oota-llvm.git] / lib / CodeGen / LexicalScopes.cpp

diff --git a/lib/CodeGen/LexicalScopes.cpp b/lib/CodeGen/LexicalScopes.cpp
index 006db6ccc9e9c9bf8e94622067123fc7aea0aa25..a5640091f712fbcfef41b10039c6092d44e3be1a 100644 (file)
--- a/lib/CodeGen/LexicalScopes.cpp
+++ b/lib/CodeGen/LexicalScopes.cpp
@@ -18,19 +18,20 @@
 #include "llvm/CodeGen/LexicalScopes.h"
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/DebugInfo.h"
+#include "llvm/IR/DebugInfo.h"
 #include "llvm/IR/Function.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/FormattedStream.h"
 using namespace llvm;
 
-LexicalScopes::~LexicalScopes() { releaseMemory(); }
+/// ~LexicalScopes - final cleanup after ourselves.
+LexicalScopes::~LexicalScopes() { reset(); }
 
-/// releaseMemory - release memory.
-void LexicalScopes::releaseMemory() {
-  MF = NULL;
-  CurrentFnLexicalScope = NULL;
+/// reset - Reset the instance so that it's prepared for another function.
+void LexicalScopes::reset() {
+  MF = nullptr;
+  CurrentFnLexicalScope = nullptr;
   DeleteContainerSeconds(LexicalScopeMap);
   DeleteContainerSeconds(AbstractScopeMap);
   InlinedLexicalScopeMap.clear();
@@ -39,7 +40,7 @@ void LexicalScopes::releaseMemory() {
 
 /// initialize - Scan machine function and constuct lexical scope nest.
 void LexicalScopes::initialize(const MachineFunction &Fn) {
-  releaseMemory();
+  reset();
   MF = &Fn;
   SmallVector<InsnRange, 4> MIRanges;
   DenseMap<const MachineInstr *, LexicalScope *> MI2ScopeMap;
@@ -59,8 +60,8 @@ void LexicalScopes::extractLexicalScopes(
   // Scan each instruction and create scopes. First build working set of scopes.
   for (MachineFunction::const_iterator I = MF->begin(), E = MF->end(); I != E;
        ++I) {
-    const MachineInstr *RangeBeginMI = NULL;
-    const MachineInstr *PrevMI = NULL;
+    const MachineInstr *RangeBeginMI = nullptr;
+    const MachineInstr *PrevMI = nullptr;
     DebugLoc PrevDL;
     for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
          II != IE; ++II) {
@@ -112,11 +113,11 @@ void LexicalScopes::extractLexicalScopes(
 /// findLexicalScope - Find lexical scope, either regular or inlined, for the
 /// given DebugLoc. Return NULL if not found.
 LexicalScope *LexicalScopes::findLexicalScope(DebugLoc DL) {
-  MDNode *Scope = NULL;
-  MDNode *IA = NULL;
+  MDNode *Scope = nullptr;
+  MDNode *IA = nullptr;
   DL.getScopeAndInlinedAt(Scope, IA, MF->getFunction()->getContext());
   if (!Scope)
-    return NULL;
+    return nullptr;
 
   // The scope that we were created with could have an extra file - which
   // isn't what we care about in this case.
@@ -132,8 +133,8 @@ LexicalScope *LexicalScopes::findLexicalScope(DebugLoc DL) {
 /// getOrCreateLexicalScope - Find lexical scope for the given DebugLoc. If
 /// not available then create new lexical scope.
 LexicalScope *LexicalScopes::getOrCreateLexicalScope(DebugLoc DL) {
-  MDNode *Scope = NULL;
-  MDNode *InlinedAt = NULL;
+  MDNode *Scope = nullptr;
+  MDNode *InlinedAt = nullptr;
   DL.getScopeAndInlinedAt(Scope, InlinedAt, MF->getFunction()->getContext());
 
   if (InlinedAt) {
@@ -158,10 +159,10 @@ LexicalScope *LexicalScopes::getOrCreateRegularScope(MDNode *Scope) {
   if (WScope)
     return WScope;
 
-  LexicalScope *Parent = NULL;
+  LexicalScope *Parent = nullptr;
   if (D.isLexicalBlock())
     Parent = getOrCreateLexicalScope(DebugLoc::getFromDILexicalBlock(Scope));
-  WScope = new LexicalScope(Parent, DIDescriptor(Scope), NULL, false);
+  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()))
@@ -196,13 +197,13 @@ LexicalScope *LexicalScopes::getOrCreateAbstractScope(const MDNode *N) {
   if (AScope)
     return AScope;
 
-  LexicalScope *Parent = NULL;
+  LexicalScope *Parent = nullptr;
   if (Scope.isLexicalBlock()) {
     DILexicalBlock DB(N);
     DIDescriptor ParentDesc = DB.getContext();
     Parent = getOrCreateAbstractScope(ParentDesc);
   }
-  AScope = new LexicalScope(Parent, DIDescriptor(N), NULL, true);
+  AScope = new LexicalScope(Parent, DIDescriptor(N), nullptr, true);
   AbstractScopeMap[N] = AScope;
   if (DIDescriptor(N).isSubprogram())
     AbstractScopesList.push_back(AScope);
@@ -243,7 +244,7 @@ void LexicalScopes::assignInstructionRanges(
     SmallVectorImpl<InsnRange> &MIRanges,
     DenseMap<const MachineInstr *, LexicalScope *> &MI2ScopeMap) {
 
-  LexicalScope *PrevLexicalScope = NULL;
+  LexicalScope *PrevLexicalScope = nullptr;
   for (SmallVectorImpl<InsnRange>::const_iterator RI = MIRanges.begin(),
                                                   RE = MIRanges.end();
        RI != RE; ++RI) {
@@ -311,8 +312,6 @@ bool LexicalScopes::dominates(DebugLoc DL, MachineBasicBlock *MBB) {
   return Result;
 }
 
-void LexicalScope::anchor() {}
-
 /// dump - Print data structures.
 void LexicalScope::dump(unsigned Indent) const {
 #ifndef NDEBUG