Make APInt arguments for GFNIAffine const

Author: chaitanyav

clang/lib/AST/ExprConstShared.h

@@ -79,7 +79,7 @@ CharUnits GetAlignOfExpr(const ASTContext &Ctx, const Expr *E,
 
 uint8_t GFNIMultiplicativeInverse(uint8_t Byte);
 uint8_t GFNIMul(uint8_t AByte, uint8_t BByte);
-uint8_t GFNIAffine(uint8_t XByte, llvm::APInt &AQword, llvm::APSInt Imm,
-                   bool Inverse = false);
+uint8_t GFNIAffine(uint8_t XByte, const llvm::APInt &AQword,
+                   const llvm::APSInt Imm, bool Inverse = false);
 
 #endif

clang/lib/AST/ExprConstant.cpp

@@ -19390,7 +19390,8 @@ uint8_t GFNIMultiplicativeInverse(uint8_t Byte) {
   return GFInv[Byte];
 }
 
-uint8_t GFNIAffine(uint8_t XByte, APInt &AQword, APSInt Imm, bool Inverse) {
+uint8_t GFNIAffine(uint8_t XByte, const APInt &AQword, const APSInt Imm,
+                   bool Inverse) {
   unsigned NumBitsInByte = 8;
   // Computing the affine transformation
   uint8_t RetByte = 0;