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420c4863a9
Since r312249 instructions of a entry block of region statements are not marked as root anymore and hence can theoretically be removed if unused. Theoretically, because the instruction list was not changed. Still, MemoryAccesses for unused instructions were removed. This lead to a failed assertion in the code generator when the MemoryAccess for the still listed instruction was not found. This hould fix the Assertion failed: ArrayAccess && "No array access found for instruction!", file ScopInfo.h, line 1494 compiler crashes. llvm-svn: 312566
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.