[LoopAccesses] Change LAA:getInfo to return a constant reference

As expected, this required a few more const-correctness fixes.

Based on Hal's feedback on D7684.

llvm-svn: 229634

2 files changed, 7 insertions, 6 deletions

diff --git a/llvm/lib/Analysis/LoopAccessAnalysis.cpp b/llvm/lib/Analysis/LoopAccessAnalysis.cpp
index a99d657ed31..c974b36d76e 100644
--- a/llvm/lib/Analysis/LoopAccessAnalysis.cpp
+++ b/llvm/lib/Analysis/LoopAccessAnalysis.cpp
@@ -1173,7 +1173,7 @@ void LoopAccessInfo::emitAnalysis(LoopAccessReport &Message) {
   Report = Message;
 }
 
-bool LoopAccessInfo::isUniform(Value *V) {
+bool LoopAccessInfo::isUniform(Value *V) const {
   return (SE->isLoopInvariant(SE->getSCEV(V), TheLoop));
 }
 
@@ -1189,7 +1189,7 @@ static Instruction *getFirstInst(Instruction *FirstInst, Value *V,
 }
 
 std::pair<Instruction *, Instruction *>
-LoopAccessInfo::addRuntimeCheck(Instruction *Loc) {
+LoopAccessInfo::addRuntimeCheck(Instruction *Loc) const {
   Instruction *tnullptr = nullptr;
   if (!PtrRtCheck.Need)
     return std::pair<Instruction *, Instruction *>(tnullptr, tnullptr);
@@ -1301,7 +1301,8 @@ void LoopAccessInfo::print(raw_ostream &OS, unsigned Depth) const {
   OS << "\n";
 }
 
-LoopAccessInfo &LoopAccessAnalysis::getInfo(Loop *L, ValueToValueMap &Strides) {
+const LoopAccessInfo &LoopAccessAnalysis::getInfo(Loop *L,
+                                                  ValueToValueMap &Strides) {
   auto &LAI = LoopAccessInfoMap[L];
 
 #ifndef NDEBUG
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index ed4210b5bcf..d75eead0683 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -756,11 +756,11 @@ public:
   bool isUniformAfterVectorization(Instruction* I) { return Uniforms.count(I); }
 
   /// Returns the information that we collected about runtime memory check.
-  LoopAccessInfo::RuntimePointerCheck *getRuntimePointerCheck() {
+  const LoopAccessInfo::RuntimePointerCheck *getRuntimePointerCheck() const {
     return LAI->getRuntimePointerCheck();
   }
 
-  LoopAccessInfo *getLAI() {
+  const LoopAccessInfo *getLAI() const {
     return LAI;
   }
 
@@ -877,7 +877,7 @@ private:
   LoopAccessAnalysis *LAA;
   // And the loop-accesses info corresponding to this loop.  This pointer is
   // null until canVectorizeMemory sets it up.
-  LoopAccessInfo *LAI;
+  const LoopAccessInfo *LAI;
 
   //  ---  vectorization state --- //