[PATCH Rust front-end v4 01/46] Use DW_ATE_UTF for the Rust 'char' type
arthur.cohen@embecosm.com
arthur.cohen@embecosm.com
Tue Dec 6 10:13:33 GMT 2022
From: Tom Tromey <tom@tromey.com>
The Rust 'char' type should use the DWARF DW_ATE_UTF encoding.
Co-authored-by: Mark Wielaard <mark@klomp.org>
Co-authored-by: Marc Poulhiès <dkm@kataplop.net>
---
gcc/dwarf2out.cc | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/gcc/dwarf2out.cc b/gcc/dwarf2out.cc
index e3920c898f5..0d8dd4f1767 100644
--- a/gcc/dwarf2out.cc
+++ b/gcc/dwarf2out.cc
@@ -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
@@ -13231,7 +13242,11 @@ 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;
@@ -25226,6 +25241,8 @@ 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. */
--
2.38.1
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