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-rw-r--r--gcc/ChangeLog4
-rw-r--r--gcc/dwarf2out.c4
-rw-r--r--gcc/testsuite/ChangeLog3
-rw-r--r--gcc/testsuite/g++.dg/debug/dwarf2/ref-1.C19
4 files changed, 30 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index cdc5f29..59e4fcf 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,9 @@
2016-08-12 Alexandre Oliva <aoliva@redhat.com>
+ PR debug/55641
+ * dwarf2out.c (decl_quals): Don't map TREE_READONLY to
+ TYPE_QUAL_CONST in reference-typed decls.
+
PR debug/49366
* dwarf2out.c (loc_list_from_tree_1): Expand some CONSTRUCTORs
in DW_OP_pieces, just enough to handle pointers to member
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index c658220..06dbadb 100644
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -11126,6 +11126,10 @@ static int
decl_quals (const_tree decl)
{
return ((TREE_READONLY (decl)
+ /* The C++ front-end correctly marks reference-typed
+ variables as readonly, but from a language (and debug
+ info) standpoint they are not const-qualified. */
+ && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
? TYPE_QUAL_CONST : TYPE_UNQUALIFIED)
| (TREE_THIS_VOLATILE (decl)
? TYPE_QUAL_VOLATILE : TYPE_UNQUALIFIED));
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 54939b8..1726157 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
2016-08-12 Alexandre Oliva <aoliva@redhat.com>
+ PR debug/55641
+ * g++.dg/debug/dwarf2/ref-1.C: New.
+
PR debug/49366
* g++.dg/debug/dwarf2/template-params-12.H: New.
* g++.dg/debug/dwarf2/template-params-12f.C: New.
diff --git a/gcc/testsuite/g++.dg/debug/dwarf2/ref-1.C b/gcc/testsuite/g++.dg/debug/dwarf2/ref-1.C
new file mode 100644
index 0000000..75e9fca
--- /dev/null
+++ b/gcc/testsuite/g++.dg/debug/dwarf2/ref-1.C
@@ -0,0 +1,19 @@
+// { dg-do compile }
+// { dg-options "-O -g -dA -gno-strict-dwarf" }
+// { dg-final { scan-assembler-not "DW_TAG_const_type" { xfail { powerpc-ibm-aix* } } } }
+
+int x;
+int &y = x;
+
+typedef int &z_t;
+z_t z = x;
+
+void f(int &p) {}
+
+struct foo {
+ int &bar;
+ typedef int &bart;
+ bart fool;
+};
+
+void f3(struct foo &p) {}