Michael Kruse 305cf623d7
[Polly] Check for ISL errors after schedule optimization (#166551)
When ISL encounters an internal error, it sets the error flag, but it is
not isl_error_quota that was already checked. Check for general errors
and abort the schedule optimization if that happens, instead of
continuing on the good path.

The error occured when compiling llvm-test-suite's
MultiSource/Applications/JM/lencod/leaky_bucket.c with Polly enabled.
Not adding a test case because it depends on ISL internals. We do not
want to a test case to depend on which version of ISL is used.
2025-11-05 13:17:05 +00:00
..

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.