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Use DW_ATE_UTF for the Rust 'char' type

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The Rust 'char' type should use the DWARF DW_ATE_UTF encoding.

	gcc/
	* dwarf2out.cc (is_rust): New.
	(base_type_die): Use DW_ATE_UTF for the Rust 'char' type.
	(gen_compile_unit_die): Handle "GNU Rust".

Co-authored-by: Mark Wielaard <mark@klomp.org>
Co-authored-by: Marc Poulhiès <dkm@kataplop.net>
This commit is contained in:
Tom Tromey 2022-08-23 15:47:13 +01:00 committed by Arthur Cohen
parent b4fddbe959
commit dd950cbbb9
1 changed files with 18 additions and 1 deletions
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19
gcc/dwarf2out.cc
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@ -5600,6 +5600,17 @@ is_fortran (const_tree decl)
return is_fortran ();
}
/* Return TRUE if the language is Rust.
Note, returns FALSE for dwarf_version < 5 && dwarf_strict. */
static inline bool
is_rust ()
{
unsigned int lang = get_AT_unsigned (comp_unit_die (), DW_AT_language);
return lang == DW_LANG_Rust;
}
/* Return TRUE if the language is Ada. */
static inline bool
@ -13232,7 +13243,11 @@ base_type_die (tree type, bool reverse)
}
if (TYPE_STRING_FLAG (type))
{
if (TYPE_UNSIGNED (type))
if ((dwarf_version >= 4 || !dwarf_strict)
&& is_rust ()
&& int_size_in_bytes (type) == 4)
encoding = DW_ATE_UTF;
else if (TYPE_UNSIGNED (type))
encoding = DW_ATE_unsigned_char;
else
encoding = DW_ATE_signed_char;
@ -25231,6 +25246,8 @@ gen_compile_unit_die (const char *filename)
{
if (strcmp (language_string, "GNU Go") == 0)
language = DW_LANG_Go;
else if (strcmp (language_string, "GNU Rust") == 0)
language = DW_LANG_Rust;
}
}
/* Use a degraded Fortran setting in strict DWARF2 so is_fortran works. */