[flang] [llvm] [flang][llvm][OpenMP][OpenACC] Add implicit casts to omp.atomic and acc.atomic (PR #131603)

[via llvm-commits]

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@@ -386,6 +442,7 @@ void genOmpAccAtomicRead(Fortran::lower::AbstractConverter &converter,
       fir::getBase(converter.genExprAddr(fromExpr, stmtCtx));
   mlir::Value toAddress = fir::getBase(converter.genExprAddr(
       *Fortran::semantics::GetExpr(assignmentStmtVariable), stmtCtx));
+  emitImplicitCast(converter, loc, fromAddress, toAddress, elementType);
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NimishMishra wrote:

Understood. I'll then make this PR ready for atomic read/write, and add a TODO for capture. 

> If at all possible I would like this to be fixed for LLVM 21 though. I am happy to take over fixing the bugs myself if you won't have time

Thanks! I'll have time to work on the atomic issues; we should be able to merge the fixes from LLVM 21 

https://github.com/llvm/llvm-project/pull/131603