PR debug/43942

	* tree.c (auto_var_in_fn_p): Return false for DECL_EXTERNAL vars.

	* c-c++-common/pr43942.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@158931 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 33 insertions, 0 deletions

diff --git a/gcc/testsuite/c-c++-common/pr43942.c b/gcc/testsuite/c-c++-common/pr43942.c
new file mode 100644
index 00000000000..3d97db6624e
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/pr43942.c
@@ -0,0 +1,33 @@
+/* PR debug/43942 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -fcompare-debug" } */
+
+extern int f1 (int);
+
+int
+f2 (int x)
+{
+  extern int v;
+  return f1 (x);
+}
+
+void
+f3 (void)
+{
+  f2 (0);
+}
+
+static inline int
+f4 (int x)
+{
+  extern int w;
+  if (w)
+    return f1 (x);
+  return 0;
+}
+
+void
+f5 (void)
+{
+  f4 (0);
+}