[PATCH] D64286: [LFTR] Don't use post-inc IV unless already used

[Nikita Popov via Phabricator via llvm-commits]

nikic marked an inline comment as done.
nikic added inline comments.


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Comment at: llvm/test/Transforms/IndVarSimplify/lftr.ll:390
+; CHECK-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV]] to i32
+; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i32 [[LFTR_WIDEIV]], [[TMP1]]
 ; CHECK-NEXT:    br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT:%.*]]
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This change can be avoided by strengthening the isLoopExitTestBasedOn() check to look for indirect uses (there's a truncate in between here).


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D64286/new/

https://reviews.llvm.org/D64286