================
@@ -246,7 +246,17 @@ def RemoveDeadValues : Pass<"remove-dead-values"> {
do = square_and_double_of_y(5)
print(do)
```
+
+ Note: If `canonicalize` is set to "false", this pass does not remove any
+ block arguments / op results from ops that implement the
+ RegionBranchOpInterface. Instead, it just sets dead operands to
+ "ub.poison".
----------------
rengolin wrote:
If you run this to a fixed point with `canon=false` and then run once more with
`true`, will the last time bypass all checks for the arguments that are all
`poison`?
https://github.com/llvm/llvm-project/pull/173505
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