[PATCH] D109091: [SCEV] Further clarify comments regarding UB and zero stride

[Philip Reames via Phabricator via llvm-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG965906997865: [SCEV] Further clarify comments regarding UB and zero stride (authored by reames).

Changed prior to commit:
  https://reviews.llvm.org/D109091?vs=370053&id=371180#toc

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D109091/new/

https://reviews.llvm.org/D109091

Files:
  llvm/lib/Analysis/ScalarEvolution.cpp


Index: llvm/lib/Analysis/ScalarEvolution.cpp
===================================================================
--- llvm/lib/Analysis/ScalarEvolution.cpp
+++ llvm/lib/Analysis/ScalarEvolution.cpp
@@ -11631,9 +11631,9 @@
     //
     // a) IV is either nuw or nsw depending upon signedness (indicated by the
     //    NoWrap flag).
-    // b) loop is single exit with no side effects.
-    // c) loop has no abnormal exits
-    //
+    // b) the loop is guaranteed to be finite (e.g. is mustprogress and has
+    //    no side effects within the loop)
+    // c) loop has a single static exit (with no abnormal exits)
     //
     // Precondition a) implies that if the stride is negative, this is a single
     // trip loop. The backedge taken count formula reduces to zero in this case.


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