[Loads] Const correct the Size argument to isSafeToLoadUnconditionally. NFC (#96993)

The APInt is not modified so we should pass by const reference.

Author: topperc

llvm/include/llvm/Analysis/Loads.h

@@ -68,7 +68,7 @@ bool isDereferenceableAndAlignedPointer(const Value *V, Align Alignment,
 /// If it is not obviously safe to load from the specified pointer, we do a
 /// quick local scan of the basic block containing ScanFrom, to determine if
 /// the address is already accessed.
-bool isSafeToLoadUnconditionally(Value *V, Align Alignment, APInt &Size,
+bool isSafeToLoadUnconditionally(Value *V, Align Alignment, const APInt &Size,
                                  const DataLayout &DL,
                                  Instruction *ScanFrom = nullptr,
                                  AssumptionCache *AC = nullptr,

llvm/lib/Analysis/Loads.cpp

@@ -349,7 +349,7 @@ bool llvm::isDereferenceableAndAlignedInLoop(LoadInst *LI, Loop *L,
 ///
 /// This uses the pointee type to determine how many bytes need to be safe to
 /// load from the pointer.
-bool llvm::isSafeToLoadUnconditionally(Value *V, Align Alignment, APInt &Size,
+bool llvm::isSafeToLoadUnconditionally(Value *V, Align Alignment, const APInt &Size,
                                        const DataLayout &DL,
                                        Instruction *ScanFrom,
                                        AssumptionCache *AC,