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8e6fb0ee84
This reapplies commit 5d6d74359d.
Fix: added assertions to the requirements of the test
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Original commit message:
In the Inliner pass, tailcalls are converted to calls in the inlined
BasicBlock. If the tailcall is indirect, the `BR` is converted to `BLR`.
These instructions require different BTI landing pads at their targets.
As the targets of indirect tailcalls are unknown, inlining such blocks
is unsound for BTI: they should be skipped instead.