http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49914

           Summary: call to abs(long long) in gcc/fold-const.c
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: marc.gli...@normalesup.org


Hello,

in gcc/fold-const.c (currently line 7051), in function
fold_plusminus_mult_expr:

if (exact_log2 (abs (int11)) > 0 && int01 % int11 == 0

where int11 is a HOST_WIDE_INT. Is this call to abs safe? A few lines above,
abs is computed as x>=0?x:-x.

(don't know how to classify this, but it causes a build failure for me with a
C++98 compiler (ambiguous))

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