Fortran: Fix array copy-in/copy-out for BIND(C) functions [PR103390]
The Fortran front end was generating invalid code for the array
copy-out after a call to a BIND(C) function for a dummy with the
CONTIGUOUS attribute when the actual argument was a call to the SHAPE
intrinsic or other array expressions that are not lvalues. It was
also generating code to evaluate the argument expression multiple
times on copy-in. This patch teaches it to recognize that a copy is
not needed in these cases.
gcc/fortran/
* expr.c (gfc_is_simply_contiguous): Make it smarter about
function calls.
* trans-expr.c (gfc_conv_gfc_desc_to_cfi_desc): Do not generate
copy loops for array expressions that are not "variables" (lvalues).