[Issue 6997] New: 64bit optimizer bug

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6997

           Summary: 64bit optimizer bug
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Keywords: wrong-code
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: timon.gehr at gmx.ch


--- Comment #0 from timon.gehr at gmx.ch 2011-11-23 13:21:40 PST ---
long fun(long a,long b,long c){
    return a<b?a<c?a:b<c?b:c:b;
}
long baz(long a, long b){
    bool s=(a<0)!=(b<0);
    a = a>0?a:-a;
    return s ? a : a;
}

struct R{
    ulong bar, qux;
    bool c;
    R foo(){
        if(!c){
            long a = baz(bar, 0),
                 b = baz(bar, 0),
                 c = baz(bar, 0);
            return R(fun(a,b,c), fun(a,b,c));
        }
        return R();
    }
}

void main(){auto x=R().foo();}

when compiled with dmd -O -release -inline (64bit), the program fails with a
segfault during runtime on my machine. Removing any of the flags makes it run
through.

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