[all-commits] [llvm/llvm-project] 7eb701: [IndVarSimplify][SimplifyIndVar] Move WidenIV to U...

[sjoerdmeijer via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 7eb70158e4d03d2c1fe430ce62aa76982a483d1b
      https://github.com/llvm/llvm-project/commit/7eb70158e4d03d2c1fe430ce62aa76982a483d1b
  Author: Sjoerd Meijer <sjoerd.meijer at arm.com>
  Date:   2020-11-05 (Thu, 05 Nov 2020)

  Changed paths:
    M llvm/include/llvm/Transforms/Utils/SimplifyIndVar.h
    M llvm/lib/Transforms/Scalar/IndVarSimplify.cpp
    M llvm/lib/Transforms/Utils/SimplifyIndVar.cpp

  Log Message:
  -----------
  [IndVarSimplify][SimplifyIndVar] Move WidenIV to Utils/SimplifyIndVar. NFCI.

This moves WidenIV from IndVarSimplify to Utils/SimplifyIndVar so that we have
createWideIV available as a generic helper utility. I.e., this is not only
useful in IndVarSimplify, but could be useful for loop transformations. For
example, motivation for this refactoring is the loop flatten transformation: if
induction variables in a loop nest can be widened, we can avoid having to
perform certain overflow checks, enabling this transformation.

Differential Revision: https://reviews.llvm.org/D90421