Tobias Grosser 28a70c543d ScopDetect: Transitively remove all children after region expansion
In rare cases, a region R which is itself not valid has an indirect child region
that is valid. When R becomes part of a valid region by expansion of another
region, then all children of R have to be erased from the set of valid regions.
This patch ensures that indirect children are erased in addition to direct
children.

Contributed-by: Armin Groesslinger <armin.groesslinger@uni-passau.de>

Tobias: I added a reduced test case and adjusted the logic of the patch to
        only recurse until the first child is found.
llvm-svn: 200411
2014-01-29 19:05:30 +00:00
..
2014-01-29 19:05:22 +00:00
2011-07-16 13:30:03 +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.