forked from OSchip/llvm-project
58e4e71fc8
Compilation of the file insn-attrtab.c of the SPEC CPU 2017 502.gcc_r benchmark takes excessive time (> 30min) with Polly enabled. Most time is spent in the isErrorBlock function querying the DominatorTree. The isErrorBlock is invoked redundantly over the course of ScopDetection and ScopBuilder. This patch introduces a caching mechanism for its result. Instead of a free function, isErrorBlock is moved to ScopDetection where its cache map resides. This also means that many functions directly or indirectly calling isErrorBlock are not "const" anymore. The DetectionContextMap was marked as "mutable", but IMHO it never should have been since it stores the detection result. 502.gcc_r only takes excessive time with the new pass manager. The reason seeams to be that it invalidates the ScopDetection analysis more often than the legacy pass manager, for unknown reasons. |
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| include/polly | ||
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| tools | ||
| unittests | ||
| utils | ||
| www | ||
| .arclint | ||
| .gitattributes | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CREDITS.txt | ||
| LICENSE.TXT | ||
| README | ||
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.