• via Digitalmars-d-bugs (35/35) May 21 2015 https://issues.dlang.org/show_bug.cgi?id=14613

via Digitalmars-d-bugs <digitalmars-d-bugs puremagic.com> writes:

https://issues.dlang.org/show_bug.cgi?id=14613

          Issue ID: 14613
           Summary: DMD: Internal error: backend/cod1.c 1567 on '-O'
                    switch
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P1
         Component: DMD
          Assignee: nobody puremagic.com
          Reporter: saurabh.das gmail.com

Created attachment 1523
  --> https://issues.dlang.org/attachment.cgi?id=1523&action=edit
reduced_expr.d

We have been working on a genetic programming project, and occasionally the
compiler fails and gives an internal error. I've captured and reduced one of
these down to a single expression. See reduced_expr.d
(http://dpaste.dzfl.pl/raw/e7a66aa067ab)

When I compile this file using: 'dmd -c -O reduced_expr.d' it fails with:

DMD 2.066.1] Internal error: backend/cod1.c 1562
DMD 2.067.1] Internal error: backend/cod1.c 1567

The compile succeeds without the '-O' flag.

Using dustmite, the expression in the file reduces to:

double someFunction(double AvgPriceChangeNormalized, double
TicksTenMinutesNormalized)
{
    return
(TicksTenMinutesNormalized?1:AvgPriceChangeNormalized)1:TicksTenMinutesNormalized/(TicksTenMinutesNormalized==0)==0;
}

This internal error has been reproduced on Linux (x86_64) and MacOS and on DMD
versions 2.066.1 and 2.067.1.

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