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digitalmars.D.bugs - [Issue 7089] New: Inconsistent results when comparing structs with NaNs

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=7089

           Summary: Inconsistent results when comparing structs with NaNs
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Keywords: wrong-code
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: dsimcha yahoo.com


--- Comment #0 from David Simcha <dsimcha yahoo.com> 2011-12-10 09:27:01 PST ---
When comparing structs that contain a NaN for equality, the results differ
between 32- and 64-bit binaries on DMD 2.057 beta:

// test2.d:
import std.stdio;

struct S {
    double d;  // NaN
}

void main() {
    S s;
    writeln(s == S.init);
}

$ dmd test2.d -m32
$ ./test2
true
$ dmd test2.d -m64
$ ./test2
false

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next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=7089


Trass3r <mrmocool gmx.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |mrmocool gmx.de
         Resolution|                            |DUPLICATE


--- Comment #1 from Trass3r <mrmocool gmx.de> 2011-12-10 10:01:55 PST ---
According to Kenji

*** This issue has been marked as a duplicate of issue 3789 ***

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prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=7089


Kenji Hara <k.hara.pg gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|DUPLICATE                   |


--- Comment #2 from Kenji Hara <k.hara.pg gmail.com> 2011-12-10 11:44:11 PST ---
Umm. Yes, issue 3789 is not yet fixed, but it is front-end issue.
Then -m32 and -m64 should output same wrong result 'true', but it doesn't.

It seems to me that there is a back-end or a optimizer bug.
(Not only issue 3789)

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