[Issue 5656] New: dmd fails to compile optimized foreach over a big enum

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=5656

           Summary: dmd fails to compile optimized foreach over a big enum
           Product: D
           Version: D2
          Platform: x86_64
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: jens.k.mueller at gmx.de


--- Comment #0 from jens.k.mueller at gmx.de 2011-02-26 14:28:45 PST ---
Created an attachment (id=923)
Test program that fails to compile

Compiling the attached file with
$ dmd -O -c test.d
fails with
Internal error: ../ztc/blockopt.c 619

If you disable the optimization it works, i.e.
$ dmd -c test.d

If the enum contains more than 197 elements it fails. Don't know why this
number. Though such a big enum may be very artificial, you can run into the
same problem if you nest foreach of smaller enums (see the commented out code
in the attached file).

$ dmd | head -1
Digital Mars D Compiler v2.051

I could not reproduce the problem in dmd v2.039. But it also exists in v2.047.
I haven't checked any dmd between v2.039 and v2.047.

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