Nikita Popov 4eafc9b6ff [IR] Treat callbr as special terminator (PR64215) ...

isLegalToHoistInto() currently return true for callbr instructions.
That means that a callbr with one successor will be considered a
proper loop preheader, which may result in instructions that use
the callbr return value being hoisted past it.

Fix this by adding callbr to isExceptionTerminator (with a rename
to isSpecialTerminator), which also fixes similar assumptions in
other places.

Fixes https://github.com/llvm/llvm-project/issues/64215.

Differential Revision: https://reviews.llvm.org/D158609

2023-08-25 09:20:18 +02:00

1.6 KiB

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