[PATCH] D41043: Support for an intrinsic "fake.use" (and corresponding operand) representing a use of an operand to aid debugging

[Eli Friedman via Phabricator via llvm-commits]

efriedma added inline comments.


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Comment at: include/llvm/IR/Intrinsics.td:831
+// Introduce a use of the argument without generating any code.
+def int_fake_use : Intrinsic<[], [llvm_vararg_ty]>;
+
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Does this support more than one argument?


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Comment at: lib/Transforms/Utils/CloneFunction.cpp:333
+      if (IntrInst->getIntrinsicID() == Intrinsic::fake_use)
+        continue;
+
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This is an interesting heuristic...

Putting the code here isn't great; IIRC some code outside the inliner uses this codepath.


https://reviews.llvm.org/D41043