llvm-project/clang/test/CodeGen/2007-07-29-RestrictPtrArg.c

// RUN: %clang_cc1 -emit-llvm %s -o - | grep noalias

void foo(int * __restrict myptr1, int * myptr2) {
  myptr1[0] = 0;
  myptr2[0] = 0;
}