From: Alexandre Oliva <oliva@adacore.com>
Date: Wed, 12 Jun 2024 03:16:22 +0000 (-0300)
Subject: map packed field type to unpacked for debug info
X-Git-Tag: basepoints/gcc-16~8359
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ea5c9f25241ae0658180afbcad7f4e298352f561;p=thirdparty%2Fgcc.git

map packed field type to unpacked for debug info

We create a distinct type for each field in a packed record with a
gnu_size, but there is no distinct debug information for them.  Use
the same unpacked type for debug information.


for  gcc/ada/ChangeLog

	* gcc-interface/decl.cc (gnat_to_gnu_field): Use unpacked type
	as the debug type for packed fields.

for  gcc/testsuite/ChangeLog

	* gnat.dg/bias1.adb: Count occurrences of -7.*DW_AT_GNU_bias.
---

diff --git a/gcc/ada/gcc-interface/decl.cc b/gcc/ada/gcc-interface/decl.cc
index 8b72c96c439..e97ff64a480 100644
--- a/gcc/ada/gcc-interface/decl.cc
+++ b/gcc/ada/gcc-interface/decl.cc
@@ -7786,6 +7786,7 @@ gnat_to_gnu_field (Entity_Id gnat_field, tree gnu_record_type, int packed,
   /* If a size is specified, adjust the field's type to it.  */
   if (gnu_size)
     {
+      tree debug_field_type = gnu_field_type;
       tree orig_field_type;
 
       /* If the field's type is justified modular, we would need to remove
@@ -7844,6 +7845,9 @@ gnat_to_gnu_field (Entity_Id gnat_field, tree gnu_record_type, int packed,
 	  && !DECL_P (TYPE_NAME (gnu_field_type)))
 	create_type_decl (TYPE_NAME (gnu_field_type), gnu_field_type, true,
 			  debug_info_p, gnat_field);
+
+      if (debug_info_p && gnu_field_type != debug_field_type)
+	SET_TYPE_DEBUG_TYPE (gnu_field_type, debug_field_type);
     }
 
   /* Otherwise (or if there was an error), don't specify a position.  */
diff --git a/gcc/testsuite/gnat.dg/bias1.adb b/gcc/testsuite/gnat.dg/bias1.adb
index 016a159b692..d9a00a1aa45 100644
--- a/gcc/testsuite/gnat.dg/bias1.adb
+++ b/gcc/testsuite/gnat.dg/bias1.adb
@@ -1,6 +1,7 @@
 --  { dg-do compile }
 --  { dg-options "-cargs -g -dA -gnatws -fgnat-encodings=gdb -margs" }
 --  { dg-final { scan-assembler "DW_AT_GNU_bias" } }
+--  { dg-final { scan-assembler-times "-7.*DW_AT_GNU_bias" 1 } }
 
 procedure Bias1 is
    type Small is range -7 .. -4;
@@ -31,4 +32,4 @@ procedure Bias1 is
 
 begin
    null;
-end Bias1;
\ No newline at end of file
+end Bias1;