[cfe-dev] OpenMP support
Ben.Gaster at clearspeed.com
Fri Mar 14 04:13:29 PDT 2008
I was wondering if there are any plans for support OpenMP within Clang
and more generally within LLVM? As I understand that the LLVM GCC 4.2
frontend supports OpenMP but this is done via a lowing phase to the GOMP
library before LLVM code generation and LLVM does not explicitly support
OpenMP. The problem with this approach is that it difficult to develop
specific optimizations for OpenMP, although not impossible, with the
LLVM framework, and more over many standard optimizations are not valid
with the OpenMP memory model. For example, an important optimization for
OpenMP is barrier removal but one would need to reconstruct this from
the GOMP library rather than optimizing for a general OpenMP
representation and then code generating for GOMP or alternative OpenMP
Benedict R. Gaster
S/W Architecture Team Lead
ClearSpeed Technology Plc
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brg at clearspeed.com
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