[PATCH] D123453: [InstCombine] Fold mul nuw+lshr exact to a single multiplication when the latter is a factor

[Dávid Bolvanský via Phabricator via llvm-commits]

xbolva00 added a comment.

Comment should be more clear



================
Comment at: llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp:1176
+
+      //  lshr exact (mul nuw x, qc * (1 << ShAmtC)), ShAmtC -> mul nuw, c
+      if (Op0->hasOneUse() && I.isExact()) {
----------------
mul nuw, c??


================
Comment at: llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp:1176
+
+      //  lshr exact (mul nuw x, qc * (1 << ShAmtC)), ShAmtC -> mul nuw, c
+      if (Op0->hasOneUse() && I.isExact()) {
----------------
xbolva00 wrote:
> mul nuw, c??
qc is what?


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D123453/new/

https://reviews.llvm.org/D123453