Recent IPA work exposed this issue by causing wrong-code for
gfortran.dg/pdt_15.f03
with optimization turned on; this shows up rather prominently with an endless
loop,
until after 300s (per optimization level) the timeout kicks in.
OK? It probably should be backported to GCC 9 + 10, I think, even though IPA
patches are mainline/GCC 11, only.
Tobias
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Walter
Fortran: Fix type-decl for PDT / wrong-code pdt_14.f03 issue [PR97652]
Parameterized derived types are handled in a special way and start with 'Pdt'.
If the 'P' is not uppercase, gfc_get_derived_type (which calls
gfc_get_module_backend_decl) does not find the existing declaration and
builds a new type. The middle end then sees those types as being different
and nonalising, creating an endless loop for pdt_14.f03.
gcc/fortran/ChangeLog:
PR fortran/97652
* module.c (mio_symbol): Fix symbol name for pdt_type.
diff --git a/gcc/fortran/module.c b/gcc/fortran/module.c
index 33e7df7d6a4..4c6ff22d5c1 100644
--- a/gcc/fortran/module.c
+++ b/gcc/fortran/module.c
@@ -4549,6 +4549,9 @@ mio_symbol (gfc_symbol *sym)
mio_symbol_attribute (&sym->attr);
+ if (sym->attr.pdt_type)
+ sym->name = gfc_dt_upper_string (sym->name);
+
/* Note that components are always saved, even if they are supposed
to be private. Component access is checked during searching. */
mio_component_list (&sym->components, sym->attr.vtype);
