[Bug c/91254] Wrong generate code with a series of array access

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91254

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |msebor at gcc dot gnu.org

--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
I only quickly glanced at the attached test program but the first thing I
noticed is that the memset call clears only a subset of the array elements.  If
the rest of the test case depends on the array being zeroed out as it seems to
it's not going to behave predictably.

  #define ARRAY_SIZE 128000

  int main(int argc, char **argv)
  {
    int casas = argc == 2 ? atoi(argv[1]) : 1000;
    int x[ARRAY_SIZE];
    int xc;
    memset(x, 0, ARRAY_SIZE);   <<<

Presumably this should be:

    memset(x, 0, sizeof x);