Change LoadAndStorePromoter to take ArrayRef instead of SmallVectorImpl&.

The array passed to LoadAndStorePromoter's constructor was a constant reference to a SmallVectorImpl, which is just the same as passing an ArrayRef.

Also, the data in the array can be 'const Instruction*' instead of 'Instruction*'.  Its not possible to convert a SmallVectorImpl<T*> to SmallVectorImpl<const T*>, but ArrayRef does provide such a method.

Currently this added calls to makeArrayRef which should be a nop, but i'm going to kick off a discussion about improving ArrayRef to not need these.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237226 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Transforms/Utils/SSAUpdater.h

@@ -14,6 +14,7 @@
 #ifndef LLVM_TRANSFORMS_UTILS_SSAUPDATER_H
 #define LLVM_TRANSFORMS_UTILS_SSAUPDATER_H
 
+#include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/Compiler.h"
 
@@ -135,7 +136,7 @@ protected:
   SSAUpdater &SSA;
 
 public:
-  LoadAndStorePromoter(const SmallVectorImpl<Instruction*> &Insts,
+  LoadAndStorePromoter(ArrayRef<const Instruction*> Insts,
                        SSAUpdater &S, StringRef Name = StringRef());
   virtual ~LoadAndStorePromoter() {}
 

lib/Transforms/Scalar/LICM.cpp

@@ -714,7 +714,8 @@ namespace {
     }
 
   public:
-    LoopPromoter(Value *SP, const SmallVectorImpl<Instruction *> &Insts,
+    LoopPromoter(Value *SP,
+                 ArrayRef<const Instruction *> Insts,
                  SSAUpdater &S, SmallPtrSetImpl<Value *> &PMA,
                  SmallVectorImpl<BasicBlock *> &LEB,
                  SmallVectorImpl<Instruction *> &LIP, PredIteratorCache &PIC,
@@ -920,7 +921,8 @@ bool llvm::promoteLoopAccessesToScalars(AliasSet &AS,
   // We use the SSAUpdater interface to insert phi nodes as required.
   SmallVector<PHINode*, 16> NewPHIs;
   SSAUpdater SSA(&NewPHIs);
-  LoopPromoter Promoter(SomePtr, LoopUses, SSA, PointerMustAliases, ExitBlocks,
+  LoopPromoter Promoter(SomePtr, makeArrayRef(LoopUses), SSA,
+                        PointerMustAliases, ExitBlocks,
                         InsertPts, PIC, *CurAST, *LI, DL, Alignment, AATags);
 
   // Set up the preheader to have a definition of the value.  It is the live-out

lib/Transforms/Scalar/SROA.cpp

@@ -1088,7 +1088,8 @@ class AllocaPromoter : public LoadAndStorePromoter {
   SmallVector<DbgValueInst *, 4> DVIs;
 
 public:
-  AllocaPromoter(const SmallVectorImpl<Instruction *> &Insts, SSAUpdater &S,
+  AllocaPromoter(ArrayRef<const Instruction *> Insts,
+                 SSAUpdater &S,
                  AllocaInst &AI, DIBuilder &DIB)
       : LoadAndStorePromoter(Insts, S), AI(AI), DIB(DIB) {}
 
@@ -4418,7 +4419,7 @@ bool SROA::promoteAllocas(Function &F) {
       DeadInsts.push_back(I);
       enqueueUsersInWorklist(*I, Worklist, Visited);
     }
-    AllocaPromoter(Insts, SSA, *AI, DIB).run(Insts);
+    AllocaPromoter(makeArrayRef(Insts), SSA, *AI, DIB).run(Insts);
     while (!DeadInsts.empty())
       DeadInsts.pop_back_val()->eraseFromParent();
     AI->eraseFromParent();

lib/Transforms/Scalar/ScalarReplAggregates.cpp

@@ -1052,7 +1052,7 @@ class AllocaPromoter : public LoadAndStorePromoter {
   SmallVector<DbgDeclareInst *, 4> DDIs;
   SmallVector<DbgValueInst *, 4> DVIs;
 public:
-  AllocaPromoter(const SmallVectorImpl<Instruction*> &Insts, SSAUpdater &S,
+  AllocaPromoter(ArrayRef<Instruction*> Insts, SSAUpdater &S,
                  DIBuilder *DB)
     : LoadAndStorePromoter(Insts, S), AI(nullptr), DIB(DB) {}
 

lib/Transforms/Utils/SSAUpdater.cpp

@@ -322,12 +322,12 @@ Value *SSAUpdater::GetValueAtEndOfBlockInternal(BasicBlock *BB) {
 //===----------------------------------------------------------------------===//
 
 LoadAndStorePromoter::
-LoadAndStorePromoter(const SmallVectorImpl<Instruction*> &Insts,
+LoadAndStorePromoter(ArrayRef<const Instruction*> Insts,
                      SSAUpdater &S, StringRef BaseName) : SSA(S) {
   if (Insts.empty()) return;
   
-  Value *SomeVal;
-  if (LoadInst *LI = dyn_cast<LoadInst>(Insts[0]))
+  const Value *SomeVal;
+  if (const LoadInst *LI = dyn_cast<LoadInst>(Insts[0]))
     SomeVal = LI;
   else
     SomeVal = cast<StoreInst>(Insts[0])->getOperand(0);