[cfe-dev] one bit error

[Ashish Gahlot via cfe-dev]

This is my first try on mailing list. Please correct if I am wrong.
On compiling this program using clang 3.9.1

#include <stdio.h>
#include <stdlib.h>

int main () {
  int i,j;
  static int x[4000][4000];
  for (j = 0; j < 4000; j++) {
     for (i = 0; i < 4000; i++) {
       x[j][i] = i + j; }
   }
}
got compiled to

        mov     dword ptr [rbp - 4], 0
        mov     dword ptr [rbp - 12], 0
.LBB0_1:                                # =>This Loop Header: Depth=1
        cmp     dword ptr [rbp - 12], 4000
        jge     .LBB0_8
        mov     dword ptr [rbp - 8], 0
.LBB0_3:                                #   Parent Loop BB0_1 Depth=1
        cmp     dword ptr [rbp - 8], 4000

while gcc 7 gives this

        mov     DWORD PTR [rbp-8], 0
.L5:
        cmp     DWORD PTR [rbp-8], 3999
        jg      .L2
        mov     DWORD PTR [rbp-4], 0
.L4:
        cmp     DWORD PTR [rbp-4], 3999
        jg      .L3

I think it should be 3999.

-- 
Ashish Kumar Gahlot
III year, UG
Govt. Engg. College, Ajmer, India
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