obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 36 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.c-torture/execute/va-arg-trap-1.c b/gcc/testsuite/gcc.c-torture/execute/va-arg-trap-1.c
new file mode 100644
index 000000000..1e1dae8e8
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/va-arg-trap-1.c
@@ -0,0 +1,36 @@
+/* Undefined behavior from a call to va_arg with a type other than
+   that of the argument passed (in particular, with a type such as
+   "float" that can never be the type of an argument passed through
+   "...") does not appear until after the va_list expression is
+   evaluated.  PR 38483.  */
+/* Origin: Joseph Myers <joseph@codesourcery.com> */
+
+#include <stdarg.h>
+
+extern void exit (int);
+extern void abort (void);
+
+va_list ap;
+float f;
+
+va_list *
+foo (void)
+{
+  exit (0);
+  return &ap;
+}
+
+void
+bar (int i, ...)
+{
+  va_start (ap, i);
+  f = va_arg (*foo (), float);
+  va_end (ap);
+}
+
+int
+main (void)
+{
+  bar (1, 0);
+  abort ();
+}