[Bug tree-optimization/55085] New: [4.8 regression] false positive -Warray-bounds

[dimhen at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55085



             Bug #: 55085

           Summary: [4.8 regression] false positive -Warray-bounds

    Classification: Unclassified

           Product: gcc

           Version: 4.8.0

            Status: UNCONFIRMED

          Severity: normal

          Priority: P3

         Component: tree-optimization

        AssignedTo: unassig...@gcc.gnu.org

        ReportedBy: dim...@gmail.com





$ gcc -Werror -Wall -Wextra -O2 -funroll-loops -c 1.c

1.c: In function 'bar':

1.c:12:11: error: array subscript is above array bounds [-Werror=array-bounds]

      if(!a[i])

           ^

void bar(unsigned m)

{

    void *a[3];



    int i;

    for(i=0; i<(int)m; i++)

        a[i]=0; // missing warning ?



    switch(m) {

    case 2:

    for(i=0; i<(int)m; i++)

        if(!a[i])

        return;

    }

}