[Bug 115] Union literals as rvalues yields different values every run

[gdc-bugzilla at gdcproject.org]

http://bugzilla.gdcproject.org/show_bug.cgi?id=115

Johannes Pfau <johannespfau at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |johannespfau at gmail.com

--- Comment #1 from Johannes Pfau <johannespfau at gmail.com> ---
The problem starts in the frontend, optimize.c(DotVarExp::optimize).
It optimizes 'func(_f(a).i)' into 'func (a)', so it produces a call to func
with an incorrectly typed parameter.

The backend then tries to pass 'a' in floating point register leading to these
strange results.

@Iain do you think this should be fixed in the frontend or in the glue layer by
doing an explicit conversion? I also wonder why the GCC backend didn't catch
this problem, I thought it should know there's a type mismatch between the
function declaration and the actual call?

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