[PATCH] D36552: [LVI] Fix LVI compile time regression around constantFoldUser()

Sanjoy Das via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Wed Aug 9 14:53:17 PDT 2017


sanjoy requested changes to this revision.
sanjoy added inline comments.
This revision now requires changes to proceed.


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Comment at: lib/Analysis/LazyValueInfo.cpp:1408
+// to call it.
+static bool canConstantFoldUser(Value *Val) {
+  return isa<CastInst>(Val) || isa<BinaryOperator>(Val);
----------------
Please add an assert in constantFolderUser that this is true for its input.  Also please s/`Value *Val`/`User *U`/


================
Comment at: lib/Analysis/LazyValueInfo.cpp:1494
       if (User *Usr = dyn_cast<User>(Val))
         ValUsesCondition = usesOperand(Usr, Condition);
       if (!ValUsesCondition)
----------------
Don't you need to guard this too?


https://reviews.llvm.org/D36552





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