Attach original file/info in the transformed file

[yanyh15]

Just like how c preprocessing attaches the original filename/line in the processed file. We can add the similar kind info to the transformed file. I believe this is actually used by the debugger. e.g. The original file:

  1 #include<stdio.h>
  2 #include<omp.h>
  3 int main(int argc, char * argv[])
  4 {
  5     //Initialize array     
  6     int arr[] = {1, 2, 3, 4, 5};
  7     int sum = 0;
  8 
  9     //Calculate length of array arr    
 10     int length = sizeof(arr)/sizeof(arr[0]);
 11 
 12     //Loop through the array to calculate sum of elements
 13 #pragma omp parallel
 14     printf("thread %d of team %d\n", omp_get_thread_num(), omp_get_num_threads());
 15 #pragma omp parallel for reduction(+:sum)
 16     for (int i = 0; i < length; i++) {
 17        sum = sum + arr[i];
 18     }
 19     printf("Sum of all the elements of an array: %d\n", sum);
 20     return 0;
 21 }

The preprocessed file:

  1 # 1 "sum_openmp.c"
  2 # 1 "<built-in>"
  3 # 1 "<command-line>"
  4 # 1 "/usr/include/stdc-predef.h" 1 3 4
  5 # 1 "<command-line>" 2
  6 # 1 "sum_openmp.c"
  7 # 1 "/usr/include/stdio.h" 1 3 4
  8 # 27 "/usr/include/stdio.h" 3 4
  9 # 1 "/usr/include/x86_64-linux-gnu/bits/libc-header-start.h" 1 3 4
 10 # 33 "/usr/include/x86_64-linux-gnu/bits/libc-header-start.h" 3 4
 11 # 1 "/usr/include/features.h" 1 3 4
 12 # 461 "/usr/include/features.h" 3 4
 13 # 1 "/usr/include/x86_64-linux-gnu/sys/cdefs.h" 1 3 4

.....

886 # 3 "sum_openmp.c" 2
887 
888 # 3 "sum_openmp.c"
889 int main(int argc, char * argv[])
890 {
891 
892     int arr[] = {1, 2, 3, 4, 5};
893     int sum = 0;
894 
895     
896     int length = sizeof(arr)/sizeof(arr[0]);
897 
898 
899         
900 # 13 "sum_openmp.c"
901 #pragma omp parallel
902 # 13 "sum_openmp.c"
903     
904     printf("thread %d of team %d\n", omp_get_thread_num(), omp_get_num_threads());
905         
906 # 15 "sum_openmp.c"
907 #pragma omp parallel for reduction(+:sum)
908 # 15 "sum_openmp.c"
909     
910     for (int i = 0; i < length; i++) {
911        sum = sum + arr[i];
912     }
913     printf("Sum of all the elements of an array: %d\n", sum);
914     return 0;
915 }