Recently I had to use it and although one assumes it returns null if
there's no parent loop, I think it helps to doc it.
Reviewed By: Meinersbur
Differential Revision: https://reviews.llvm.org/D74890
In the approval of D65299, commited as rL367440, I mentioned that my
proposed wording was lacking the word "maximal". It is added now for
correctness.
llvm-svn: 367445
Given the example:
header:
br i1 %c, label %next, label %header
next:
br i1 %c2, label %exit, label %header
We end up with a loop containing both header and next. Given that, the describing the loop in terms of cycles is confusing since we have multiple distinct cycles within a single Loop. Standardize on the SCC to clarify.
Differential Revision: https://reviews.llvm.org/D65299
llvm-svn: 367440
I've noticed a lot of confusion around this area recently with key terms being misused in a number of threads. To help reign that in, let's go ahead and document the current terminology and meaning thereof.
My hope is to grow this over time into a broader discussion of canonical loop forms - yes, there are more than one ... many more than one - but for the moment, simply having the key terminology is a good stopping place.
Note: I am landing this *without* an LGTM. All feedback so far has been positive, and trying to apply all of the suggested changes/extensions would cause the review to never end. Instead, I decided to land it with the obvious fixes made based on reviewer comments, then iterate from there.
Differential Revision: https://reviews.llvm.org/D65164
llvm-svn: 366960
