Relax verification of dealloc_stack. #2288
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Allow it to have undef as an operand. This can happen when NoReturnFolding does RAUW for the instructions that come after a @NoReturn function, replacing the uses of those instructions in blocks that are unreachable. These instructions end up getting deleted during diagnose unreachable when we remove the unreachable code. Fixes SR-967 / rdar://problem/25882880.
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@swift-ci Please test and merge. |
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What's in this pull request?
Relax verification of dealloc_stack, allowing it to have an undef operand.
Resolved bug number: (SR-967)
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Allow it to have undef as an operand.
This can happen when NoReturnFolding does RAUW for the instructions that
come after a @NoReturn function, replacing the uses of those
instructions in blocks that are unreachable. These instructions end up
getting deleted during diagnose unreachable when we remove the
unreachable code.
Fixes SR-967 / rdar://problem/25882880.