[llvm-branch-commits] [llvm] [LoopInterchange] Change the cost model to interchange `[* =]` (PR #193481)

[Ryotaro Kasuga via llvm-branch-commits]

kasuga-fj wrote:

@sjoerdmeijer This patch should not be mandatory for the default enablement, but it should give us some simple cases that demonstrate performance improvements from loop interchange. IIUC, with this patch, several loops in the llvm-test-suite (e.g., mentioned in https://discourse.llvm.org/t/loopinterchange-some-questions-and-a-potential-missing-case/90270) will be interchanged.

https://github.com/llvm/llvm-project/pull/193481