[PATCH] D148841: [LV] Use SCEV for uniformity analysis across VF

[Nikita Popov via Phabricator via llvm-commits]

nikic added inline comments.


================
Comment at: llvm/lib/Analysis/LoopAccessAnalysis.cpp:2570
+    // Build a new AddRec by multiplying the step by StepMultiplier and adding
+    // Offset * Step to the resulting AddRec.
+    auto *Ty = Expr->getType();
----------------
Assert that the addrec loop is correct?


================
Comment at: llvm/lib/Analysis/LoopAccessAnalysis.cpp:2577
+                         SE.getMulExpr(StepC, Expr->getStepRecurrence(SE)),
+                         Expr->getLoop(), Expr->getNoWrapFlags()),
+        SE.getMulExpr(OffsetC, Expr->getStepRecurrence(SE)));
----------------
Why is it valid to preserve nowrap flags here?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D148841/new/

https://reviews.llvm.org/D148841