The slides and videos for the last LLVM conference are up, and it
seems there is a way to use the Clang C++ front-end with the
Intel back-end. So in theory a LDC2+Intel compiler is possible :-)
http://llvm.org/devmtg/2014-04/PDFs/Posters/ClangIntel.pdf
It looks like the faster route to an Intel D compiler :-)
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Unrelated: from the same conferences I've also appreciated the
slides about the data structures of LLVM, that look handy (I
created a SmallVector in D because it's quite useful, I think
it's in Bugzilla):
http://llvm.org/devmtg/2014-04/PDFs/LightningTalks/data_structure_llvm.pdf
Bye,
bearophile