[gcc r12-2166] [Ada] Use encoded names only with -fgnat-encodings=all

[Pierre-Marie de Rodat <pmderodat@gcc.gnu.org>]

https://gcc.gnu.org/g:4d743233ad29c03b5c65cfaf802d7c91f7fcc32c

commit r12-2166-g4d743233ad29c03b5c65cfaf802d7c91f7fcc32c
Author: Eric Botcazou <ebotcazou@adacore.com>
Date:   Fri Jun 4 18:08:49 2021 +0200

    [Ada] Use encoded names only with -fgnat-encodings=all
    
    gcc/ada/
    
            * exp_dbug.adb (Get_Encoded_Name): Do not encode names of discrete
            types with custom bounds, except with -fgnat-encodings=all.
            * exp_pakd.adb (Create_Packed_Array_Impl_Type): Adjust comment.

Diff:
---
 gcc/ada/exp_dbug.adb | 11 +++++------
 gcc/ada/exp_pakd.adb |  4 ++--
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/gcc/ada/exp_dbug.adb b/gcc/ada/exp_dbug.adb
index ed5ae43be9b..bfc3b3356f1 100644
--- a/gcc/ada/exp_dbug.adb
+++ b/gcc/ada/exp_dbug.adb
@@ -655,10 +655,10 @@ package body Exp_Dbug is
 
       Has_Suffix := True;
 
-      --  Fixed-point case: generate GNAT encodings when asked to
+      --  Generate GNAT encodings when asked to for fixed-point case
 
-      if Is_Fixed_Point_Type (E)
-        and then GNAT_Encodings = DWARF_GNAT_Encodings_All
+      if GNAT_Encodings = DWARF_GNAT_Encodings_All
+        and then Is_Fixed_Point_Type (E)
       then
          Get_External_Name (E, True, "XF_");
          Add_Real_To_Buffer (Delta_Value (E));
@@ -668,10 +668,9 @@ package body Exp_Dbug is
             Add_Real_To_Buffer (Small_Value (E));
          end if;
 
-      --  Discrete case where bounds do not match size. Not necessary if we can
-      --  emit standard DWARF.
+      --  Likewise for discrete case where bounds do not match size
 
-      elsif GNAT_Encodings /= DWARF_GNAT_Encodings_Minimal
+      elsif GNAT_Encodings = DWARF_GNAT_Encodings_All
         and then Is_Discrete_Type (E)
         and then not Bounds_Match_Size (E)
       then
diff --git a/gcc/ada/exp_pakd.adb b/gcc/ada/exp_pakd.adb
index 7e295024b9d..3477bba3d78 100644
--- a/gcc/ada/exp_pakd.adb
+++ b/gcc/ada/exp_pakd.adb
@@ -828,8 +828,8 @@ package body Exp_Pakd is
 
       elsif not Is_Constrained (Typ) then
 
-         --  When generating standard DWARF (i.e when GNAT_Encodings is
-         --  DWARF_GNAT_Encodings_Minimal), the ___XP suffix will be stripped
+         --  When generating standard DWARF (i.e when GNAT_Encodings is not
+         --  DWARF_GNAT_Encodings_All), the ___XP suffix will be stripped
          --  by the back-end but generate it anyway to ease compiler debugging.
          --  This will help to distinguish implementation types from original
          --  packed arrays.