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... when the derived type used in the structure constructor(s) is from another module and not use-associated into the current module. This came up in a test with a derived type component default initializer of "c_null_ptr", which is replaced with the expression "__builtin_c_ptr(address=0_8)"; the derived type name "__builtin_c_ptr" is not available in the current scope, and the module file would fail semantic analysis when USE'd. The best solution that I found was to extend module file generation to detect this case and handle it by inserting the right USE association to the ultimate derived type symbol, possibly with renaming to a compiler-created name in the case of a conflict. To implement this transformation, it was necessary to fix the utility evaluate::CollectSymbols() to include the derived type symbol from a structure constructor. This involved extending the expression traversal framework to visit the derived type spec of a structure constructor. Extending CollectSymbols() caused a lowering test to fail mysteriously, so I tracked down the code in PFTBuilder that didn't expect to see a DerivedTypeDetails symbol and dealt with it there.
31 lines
1.1 KiB
Fortran
31 lines
1.1 KiB
Fortran
! RUN: %python %S/test_modfile.py %s %flang_fc1
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! Test derived type renaming in initializers necessary to avoid
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! clashing with local names
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module m
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use, intrinsic :: iso_c_binding, only: &
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c_ptr, c_funptr, c_null_ptr, c_null_funptr
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real, private :: __builtin_c_ptr, __builtin_c_funptr
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type mydt
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type(c_funptr) :: component = c_null_funptr
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end type
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type(c_ptr), parameter :: namedConst = c_null_ptr
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end
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!Expect: m.mod
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!module m
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!use,intrinsic::__fortran_builtins,only:__fortran_builtins$__builtin_c_ptr=>__builtin_c_ptr
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!use,intrinsic::__fortran_builtins,only:__fortran_builtins$__builtin_c_funptr=>__builtin_c_funptr
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!use,intrinsic::iso_c_binding,only:c_ptr
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!use,intrinsic::iso_c_binding,only:c_funptr
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!use,intrinsic::iso_c_binding,only:c_null_ptr
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!use,intrinsic::iso_c_binding,only:c_null_funptr
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!private::__fortran_builtins$__builtin_c_ptr
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!private::__fortran_builtins$__builtin_c_funptr
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!real(4),private::__builtin_c_ptr
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!real(4),private::__builtin_c_funptr
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!type::mydt
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!type(c_funptr)::component=__fortran_builtins$__builtin_c_funptr(__address=0_8)
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!end type
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!type(c_ptr),parameter::namedconst=__fortran_builtins$__builtin_c_ptr(__address=0_8)
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!end
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