[C++11] Make this interface accept const Use pointers and use override

to ensure we don't mess up any of the overrides. Necessary for cleaning
up the Value use iterators and enabling range-based traversing of use
lists.

llvm-svn: 202958

5 files changed, 12 insertions, 12 deletions

diff --git a/llvm/include/llvm/Analysis/CaptureTracking.h b/llvm/include/llvm/Analysis/CaptureTracking.h
index 8edabfe860a..eccf1f81138 100644
--- a/llvm/include/llvm/Analysis/CaptureTracking.h
+++ b/llvm/include/llvm/Analysis/CaptureTracking.h
@@ -45,12 +45,12 @@ namespace llvm {
     /// capture) return false. To search it, return true.
     ///
     /// U->getUser() is always an Instruction.
-    virtual bool shouldExplore(Use *U);
+    virtual bool shouldExplore(const Use *U);
 
     /// captured - Information about the pointer was captured by the user of
     /// use U. Return true to stop the traversal or false to continue looking
     /// for more capturing instructions.
-    virtual bool captured(Use *U) = 0;
+    virtual bool captured(const Use *U) = 0;
   };
 
   /// PointerMayBeCaptured - Visit the value and the values derived from it and
diff --git a/llvm/lib/Analysis/AliasAnalysis.cpp b/llvm/lib/Analysis/AliasAnalysis.cpp
index 8f2ddb5507d..36ed40d3549 100644
--- a/llvm/lib/Analysis/AliasAnalysis.cpp
+++ b/llvm/lib/Analysis/AliasAnalysis.cpp
@@ -372,7 +372,7 @@ namespace {
 
     void tooManyUses() override { Captured = true; }
 
-    bool shouldExplore(Use *U) override {
+    bool shouldExplore(const Use *U) override {
       Instruction *I = cast<Instruction>(U->getUser());
       BasicBlock *BB = I->getParent();
       // We explore this usage only if the usage can reach "BeforeHere".
@@ -388,7 +388,7 @@ namespace {
       return true;
     }
 
-    bool captured(Use *U) override {
+    bool captured(const Use *U) override {
       Instruction *I = cast<Instruction>(U->getUser());
       BasicBlock *BB = I->getParent();
       // Same logic as in shouldExplore.
diff --git a/llvm/lib/Analysis/CaptureTracking.cpp b/llvm/lib/Analysis/CaptureTracking.cpp
index 1e864b29547..60978470d2b 100644
--- a/llvm/lib/Analysis/CaptureTracking.cpp
+++ b/llvm/lib/Analysis/CaptureTracking.cpp
@@ -28,7 +28,7 @@ using namespace llvm;
 
 CaptureTracker::~CaptureTracker() {}
 
-bool CaptureTracker::shouldExplore(Use *U) { return true; }
+bool CaptureTracker::shouldExplore(const Use *U) { return true; }
 
 namespace {
   struct SimpleCaptureTracker : public CaptureTracker {
@@ -37,7 +37,7 @@ namespace {
 
     void tooManyUses() override { Captured = true; }
 
-    bool captured(Use *U) override {
+    bool captured(const Use *U) override {
       if (isa<ReturnInst>(U->getUser()) && !ReturnCaptures)
         return false;
 
@@ -81,8 +81,8 @@ static int const Threshold = 20;
 
 void llvm::PointerMayBeCaptured(const Value *V, CaptureTracker *Tracker) {
   assert(V->getType()->isPointerTy() && "Capture is for pointers only!");
-  SmallVector<Use*, Threshold> Worklist;
-  SmallSet<Use*, Threshold> Visited;
+  SmallVector<const Use *, Threshold> Worklist;
+  SmallSet<const Use *, Threshold> Visited;
   int Count = 0;
 
   for (Value::const_use_iterator UI = V->use_begin(), UE = V->use_end();
@@ -99,7 +99,7 @@ void llvm::PointerMayBeCaptured(const Value *V, CaptureTracker *Tracker) {
   }
 
   while (!Worklist.empty()) {
-    Use *U = Worklist.pop_back_val();
+    const Use *U = Worklist.pop_back_val();
     Instruction *I = cast<Instruction>(U->getUser());
     V = U->get();
 
diff --git a/llvm/lib/Transforms/IPO/FunctionAttrs.cpp b/llvm/lib/Transforms/IPO/FunctionAttrs.cpp
index 68eca52991b..cb565d0814b 100644
--- a/llvm/lib/Transforms/IPO/FunctionAttrs.cpp
+++ b/llvm/lib/Transforms/IPO/FunctionAttrs.cpp
@@ -344,7 +344,7 @@ namespace {
 
     void tooManyUses() override { Captured = true; }
 
-    bool captured(Use *U) override {
+    bool captured(const Use *U) override {
       CallSite CS(U->getUser());
       if (!CS.getInstruction()) { Captured = true; return true; }
 
diff --git a/llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp b/llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp
index fad4e0a6a3d..bf49f814f63 100644
--- a/llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp
+++ b/llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp
@@ -151,14 +151,14 @@ struct AllocaCaptureTracker : public CaptureTracker {
 
   void tooManyUses() override { Captured = true; }
 
-  bool shouldExplore(Use *U) override {
+  bool shouldExplore(const Use *U) override {
     Value *V = U->getUser();
     if (isa<CallInst>(V) || isa<InvokeInst>(V))
       UsesAlloca.insert(V);
     return true;
   }
 
-  bool captured(Use *U) override {
+  bool captured(const Use *U) override {
     if (isa<ReturnInst>(U->getUser()))
       return false;
     Captured = true;