[Clang][CodeGen] Move `EmitPointerArithmetic` into `CodeGenFunction`. NFC. (#152634)

`CodeGenFunction::EmitPointerArithmetic` is needed by
https://github.com/llvm/llvm-project/pull/152575. Separate the NFC
changes into a new PR for smooth review.

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index 272587f..bf16d72 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -5212,6 +5212,12 @@ public:
   /// operation is a subtraction.
   enum { NotSubtraction = false, IsSubtraction = true };
 
+  /// Emit pointer + index arithmetic.
+  llvm::Value *EmitPointerArithmetic(const BinaryOperator *BO,
+                                     Expr *pointerOperand, llvm::Value *pointer,
+                                     Expr *indexOperand, llvm::Value *index,
+                                     bool isSubtraction);
+
   /// Same as IRBuilder::CreateInBoundsGEP, but additionally emits a check to
   /// detect undefined behavior when the pointer overflow sanitizer is enabled.
   /// \p SignedIndices indicates whether any of the GEP indices are signed.