Stephen Tozer ce0c1f3ced [DebugInfo] Fix crash when emitting an invalidated SDDbgValue ...

This patch fixes a crash in the compiler that occurs when certain
invalidated SDDbgValues are emitted. The cause of this was that we would
attempt to check the liveness of the debug value's operands, which
triggers an assert if any of those operands are invalid. This patch
changes this check such that it only occurs if the SDDbgValue is valid;
if not, the check is irrelevant anyway, so can be safely ignored.

Differential Revision: https://reviews.llvm.org/D101540

2021-05-07 13:13:56 +01:00

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