2d956d2d4e
Some MPI libraries use character dummies + ignore(TKR) to allow passing any kind of buffer. This was meant to already be handled by #108168 However, when the library interface also had an argument requiring an explicit interface, `builder.convertWithSemantics` was not allowed to properly deal with the actual/dummy type mismatch and generated bad IR causing errors like: `'fir.convert' op invalid type conversion'!fir.ref' / '!fir.boxchar\<1\>'`. This restriction was artificial, lowering should just handle any cases allowed by semantics. Just remove it.
The LLVM Compiler Infrastructure
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