[Issue 9387] Compiler switch -O changes behavior of correct code

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=9387


Don <clugdbug at yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice
         OS/Version|Mac OS X                    |All


--- Comment #13 from Don <clugdbug at yahoo.com.au> 2013-01-29 23:51:04 PST ---
A reduced test case for the ICE:

import std.math : abs;

void bug9387()
{
    double x = 3;
    double r = (x-2.1)*0.1;
    double q = (x-2.1)*0.1 - r;
    double p = (x-2.1)*q - (x-2.1)*r;

    if (q > 0.0) p = -p;
    if (abs(p) >= q ) { }
}
---
dmd -O -m64 bug.d
Internal error: backend/cgcod.c 769

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