From: Martin Uecker <uecker@tugraz.at>
Date: Tue, 23 Jan 2024 12:33:34 +0000 (+0100)
Subject: Fix ICE with -g and -std=c23 when forming composite types [PR113438]
X-Git-Tag: basepoints/gcc-15~1473
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f6ba433d3c30c20fadd393eed31617a4da81789c;p=thirdparty%2Fgcc.git

Fix ICE with -g and -std=c23 when forming composite types [PR113438]

Set TYPE_STUB_DECL to an artificial decl when creating a new structure
as a composite type.

	PR c/113438

gcc/c/
	* c-typeck.cc (composite_type_internal): Set TYPE_STUB_DECL.

gcc/testsuite/
	* gcc.dg/pr113438.c: New test.
---

diff --git a/gcc/c/c-typeck.cc b/gcc/c/c-typeck.cc
index 12d1a5a5fa19..3b519c48ae0a 100644
--- a/gcc/c/c-typeck.cc
+++ b/gcc/c/c-typeck.cc
@@ -585,6 +585,11 @@ composite_type_internal (tree t1, tree t2, struct composite_cache* cache)
 	  /* Setup the struct/union type.  Because we inherit all variably
 	     modified components, we can ignore the size expression.  */
 	  tree expr = NULL_TREE;
+
+	  /* Set TYPE_STUB_DECL for debugging symbols.  */
+	  TYPE_STUB_DECL (n) = pushdecl (build_decl (input_location, TYPE_DECL,
+						     NULL_TREE, n));
+
 	  n = finish_struct(input_location, n, fields, attributes, NULL, &expr);
 
 	  n = qualify_type (n, t1);
diff --git a/gcc/testsuite/gcc.dg/pr113438.c b/gcc/testsuite/gcc.dg/pr113438.c
new file mode 100644
index 000000000000..5612ee4fa385
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr113438.c
@@ -0,0 +1,7 @@
+/* PR113438
+ * { dg-do compile }
+ * { dg-options "-std=c23 -g" } */
+
+void g(struct foo { int x; } a);
+void g(struct foo { int x; } a);
+