efe18d3977
The general-purpose add() now sometimes adds unexpected loop-variant pointers to the AliasSetTracker, so certain loops would be rejected with -polly-allow-modref-calls. Use addUnknown() instead, which has the old behavior. I'm not completely convinced the resulting behavior is actually correct: ScopDetection::isValidAccess seems to mostly ignore "unknown" instructions in the AliasSetTracker. But it's not any worse than what was happening before. Committing without pre-commit review to unbreak the buildbots; the following tests were failing: test/ScopInfo/mod_ref_access_pointee_arguments.ll test/ScopInfo/mod_ref_read_pointee_arguments.ll test/ScopInfo/multidim_2d_with_modref_call_2.ll llvm-svn: 342010
Polly - Polyhedral optimizations for LLVM ----------------------------------------- http://polly.llvm.org/ Polly uses a mathematical representation, the polyhedral model, to represent and transform loops and other control flow structures. Using an abstract representation it is possible to reason about transformations in a more general way and to use highly optimized linear programming libraries to figure out the optimal loop structure. These transformations can be used to do constant propagation through arrays, remove dead loop iterations, optimize loops for cache locality, optimize arrays, apply advanced automatic parallelization, drive vectorization, or they can be used to do software pipelining.