Make byref llvm::Use parameters const. NFC.

llvm-svn: 308522

Author: Meinersbur

polly/include/polly/Support/ScopHelper.h

@@ -409,7 +409,7 @@ bool canSynthesize(const llvm::Value *V, const Scop &S,
 /// operand must be defined (i.e. its definition dominates this block).
 /// Non-instructions do not use operands at a specific point such that in this
 /// case this function returns nullptr.
-llvm::BasicBlock *getUseBlock(llvm::Use &U);
+llvm::BasicBlock *getUseBlock(const llvm::Use &U);
 
 /// Derive the individual index expressions from a GEP instruction.
 ///

polly/include/polly/Support/VirtualInstruction.h

@@ -97,7 +97,7 @@ class VirtualUse {
   /// @param Virtual Whether to ignore existing MemoryAcccess.
   ///
   /// @return The VirtualUse representing the same use as @p U.
-  static VirtualUse create(Scop *S, Use &U, LoopInfo *LI, bool Virtual);
+  static VirtualUse create(Scop *S, const Use &U, LoopInfo *LI, bool Virtual);
 
   /// Get a VirtualUse for any kind of use of a value within a statement.
   ///

polly/lib/Support/ScopHelper.cpp

@@ -508,7 +508,7 @@ bool polly::canSynthesize(const Value *V, const Scop &S, ScalarEvolution *SE,
   return false;
 }
 
-llvm::BasicBlock *polly::getUseBlock(llvm::Use &U) {
+llvm::BasicBlock *polly::getUseBlock(const llvm::Use &U) {
   Instruction *UI = dyn_cast<Instruction>(U.getUser());
   if (!UI)
     return nullptr;

polly/lib/Support/VirtualInstruction.cpp

@@ -18,7 +18,8 @@
 using namespace polly;
 using namespace llvm;
 
-VirtualUse VirtualUse ::create(Scop *S, Use &U, LoopInfo *LI, bool Virtual) {
+VirtualUse VirtualUse ::create(Scop *S, const Use &U, LoopInfo *LI,
+                               bool Virtual) {
   auto *UserBB = getUseBlock(U);
   auto *UserStmt = S->getStmtFor(UserBB);
   auto *UserScope = LI->getLoopFor(UserBB);