LoopCacheAnalysis currently assumes the loop will be iterated over in
a forward direction. This patch addresses the issue by using the
absolute value of the stride when iterating backwards.
Note: this patch will treat negative and positive array access the
same, resulting in the same cost being calculated for single and
bi-directional access patterns. This should be improved in a
subsequent patch.
Reviewed By: jdoerfert
Differential Revision: https://reviews.llvm.org/D73064
Ensure the stride and trip count have the same type before multiplying them during reference cost calculation
Reviewed By: jdoefert
Differential Revision: https://reviews.llvm.org/D70192
Rachel Craik