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During the construction of MemoryAccesses in ScopBuilder, BasicBlocks were used in function parameters, assuming that the ScopStmt an be directly derived from it. This won't be true anymore once we split BasicBlocks into multiple ScopStmt. As a preparation for such a change in the future, we instead pass the ScopStmt and avoid the use of getStmtFor(). There are two occasions where a kind of mapping from BasicBlock to ScopStmt is still required. 1. Get the statement representing the incoming block of a `PHINode` using `getLastStmtOf`. 2. One statement is required to write a scalar to be readable by those which need it. This is most often the statement which contains its definition, which we get using `getStmtFor(Instruction*)`. Differential Revision: https://reviews.llvm.org/D34369 llvm-svn: 306132
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.