[all-commits] [llvm/llvm-project] 13ead0: [Flang] Fix PowerPC build failure due to the depre...

[Daniel Chen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 13ead00049e2faea57dac2d9a43f2aef5bbe3370
      https://github.com/llvm/llvm-project/commit/13ead00049e2faea57dac2d9a43f2aef5bbe3370
  Author: Daniel Chen <cdchen at ca.ibm.com>
  Date:   2025-07-10 (Thu, 10 Jul 2025)

  Changed paths:
    M flang/lib/Optimizer/CodeGen/CodeGen.cpp
    M flang/lib/Optimizer/CodeGen/PreCGRewrite.cpp

  Log Message:
  -----------
  [Flang] Fix PowerPC build failure due to the deprecation of ArrayRef(std::nullopt_t) {}. (#147816)

Our local Flang build on PowerPC was broken as
```
llvm/flang/../mlir/include/mlir/IR/ValueRange.h:401:20: error: 'ArrayRef' is deprecated: Use {} or ArrayRef<T>() instead [-Werror,-Wdeprecated-declarations]
  401 |       : ValueRange(ArrayRef<Value>(std::forward<Arg>(arg))) {}
      |                    ^
llvm/flang/lib/Optimizer/CodeGen/CodeGen.cpp:2243:53: note: in instantiation of function template specialization 'mlir::ValueRange::ValueRange<const std::nullopt_t &, void>' requested here
 2243 |                              /*cstInteriorIndices=*/std::nullopt, fieldIndices,
      |                                                     ^
 llvm/include/llvm/ADT/ArrayRef.h:70:18: note: 'ArrayRef' has been explicitly marked deprecated here
   70 |     /*implicit*/ LLVM_DEPRECATED("Use {} or ArrayRef<T>() instead", "{}")
      |                  ^
llvm/include/llvm/Support/Compiler.h:244:50: note: expanded from macro 'LLVM_DEPRECATED'
  244 | #define LLVM_DEPRECATED(MSG, FIX) __attribute__((deprecated(MSG, FIX)))
      |                                                  ^
1 error generated.
```

This patch is to fix it.



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