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* Update to isl-0.18-417-gb9e7334Tobias Grosser2017-04-061-0/+31
| | | | | | This is a regular maintenance update. llvm-svn: 299617
* Update isl to 0ae2b02 "isl_seq_combine: optimize for common case"Tobias Grosser2015-02-171-0/+8
| | | | | | | | This is just a single commit that includes a performance optimization that should improve dependence analysis time. Our performance bots should measure this difference. llvm-svn: 229476
* Import isl(+imath) as an external library into PollyTobias Grosser2015-02-041-0/+321
With this patch Polly is always GPL-free (no dependency on GMP any more). As a result, building and distributing Polly will be easier. Furthermore, there is no need to tightly coordinate isl and Polly releases anymore. We import isl b3e0fa7a05d as well as imath 4d707e5ef2. These are the git versions Polly currently was tested with when using utils/checkout_isl.sh. The imported libraries are both MIT-style licensed. We build isl and imath with -fvisibility=hidden to avoid clashes in case other projects (such as gcc) use conflicting versions of isl. The use of imath can temporarily reduce compile-time performance of Polly. We will work on performance tuning in tree. Patches to isl should be contributed first to the main isl repository and can then later be reimported to Polly. This patch is also a prerequisite for the upcoming isl C++ interface. llvm-svn: 228193
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