forked from OSchip/llvm-project
b143e31164
Normally this is ensured when adding PHI nodes, but as PHI node dependences do not need to be added in case all incoming blocks are within the same non-affine region, this was missed. This corrects an issue visible in LNT's sqlite3, in case invariant load hoisting was disabled. llvm-svn: 278792 |
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README
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.