Scalar variable not correctly generated for loop unrolling

[overrainbow]

This issue occurs in loop unrolling. For example:

/*@ begin PerfTuning (
  4   def build
  5   {
  6   arg build_command = 'gcc -O3';
  7   arg libs = '-lm -lrt';
  8   }
  9
 10   def performance_counter
 11   {
 12   arg repetitions = 10;
 13   }
 14
 15   def performance_params
 16   {
 17
 18     # Unroll-jam
 19     param U1_I[] = [1]+range(2,17,2);
 20
 21     # Scalar replacement
 22     param SCR[]  = [False,True];
 23
 24   }
 25
 26   def search
 27   {
 28     arg algorithm = 'Exhaustive';
 29   }
 30
 31   def input_params
 32   {
 33   param N[] = [1000];
 34   }
 35
 36   def input_vars
 37   {
 38   arg init_file = 'init.c';
 39   }
 40 ) @*/
 41
 42 #define max(x,y)    ((x) > (y)? (x) : (y))
 43 #define min(x,y)    ((x) < (y)? (x) : (y))
 44
 45 int i;
 46 double expect;`

 50 /*@ begin Loop(
 51
 52   transform Composite(
 53     unrolljam = (['i'],[U1_I]),
 54     scalarreplace = (SCR, 'double')
 55   )
 56   for (i = 0; i <= N-1; i++) {
 57     expect = expect + s[i];
 58   }
 59
 60   expect = expect/N;
 61 ) @*/
 62
 63
 64 /*@ end @*/
 65
 66 /*@ end @*/ 

In one generated variant:

for (int loop_56=0; loop_56 < 1; loop_56++)  {
 69     for (int i = 0; i <= N - 16; i = i + 16) {
 70       expect = expect + s[i];
 71       expect1 = expect1 + s[(i + 1)];
 72       expect2 = expect2 + s[(i + 2)];
 73       expect3 = expect3 + s[(i + 3)];
 74       expect4 = expect4 + s[(i + 4)];
 75       expect5 = expect5 + s[(i + 5)];
 76       expect6 = expect6 + s[(i + 6)];
 77       expect7 = expect7 + s[(i + 7)];
 78       expect8 = expect8 + s[(i + 8)];
 79       expect9 = expect9 + s[(i + 9)];
 80       expect10 = expect10 + s[(i + 10)];
 81       expect11 = expect11 + s[(i + 11)];
 82       expect12 = expect12 + s[(i + 12)];
 83       expect13 = expect13 + s[(i + 13)];
 84       expect14 = expect14 + s[(i + 14)];
 85       expect15 = expect15 + s[(i + 15)];
 86     }
 87     for (int i = N - ((N - (0)) % 16); i <= N - 1; i = i + 1) {
 88       expect = expect + s[i];
 89     }
 90   }
 91 expect = expect / N;

It raises errors for the scalar variable:

error: ‘expect1’ undeclared (first use in this function); did you mean ‘expect’?
expect1 = expect1 + s[(i + 1)];

Thanks!