On 10 Aug 2015, at 11:37, Martin Nowak via dmd-internals wrote:
On 07/11/2015 08:27 PM, David Nadlinger via dmd-internals wrote:
With 2.067 the volatileLoad and volatileStore intrinsics were added,
which are directly lowered to loads and stores. Is DMD's optimizer
overly conservative here and prohibits *all* code motion across these
[…]
No unnecessary hacks please, let's simply add intrinsics to dmd.
https://issues.dlang.org/show_bug.cgi?id=13713
Sure, this would be a much better solution. However, I have little
inclination of digging into the DMD backend to add this myself. And
given that Walter and Andrei still do not seem to acknowledge the
importance of a well-defined and reasonably fine-grained memory model
for today's high performance code, I am not holding my breath for
somebody else to do it. (Ab)using volatile{Load, Store} would have
simple been a quick fix for the currently abysmal DMD codegen on x86.
— David
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