mirror of
https://github.com/capstone-engine/llvm-capstone.git
synced 2025-02-03 07:38:57 +00:00
e199f285b0
Control flow would flow-through after the check whether the operations quota exceeded, with the intention that it would later be caught by Knowledge::isUsable(). However, the Knowledge constructor has its own assertions to check consistency which would fail if its fields have only been initialized partially because some sets have been computed correctly before the operations quota takes effect. Fix by erroring-out early instead of falling-throught into the code that might expect that everything has been computed correctly. For robustness, also bail-out if any of the fields contain nullptr values instead of relying on isl always setting exactly this error code if something went wrong. This should fix the perf-x86_64-penryn-O3-polly-before-vectorizer-unprofitable (-polly-process-unprofitable -polly-position=before-vectorizer -polly-enable-delicm) buildbot. llvm-svn: 296022
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.