l

Tests for various kinds of spurious uninit variable warning.
All are derived from cpplib; see comments in the files.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@25710 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 52 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/uninit-2.c b/gcc/testsuite/gcc.dg/uninit-2.c
new file mode 100644
index 00000000000..5035a309ebd
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/uninit-2.c
@@ -0,0 +1,52 @@
+/* Spurious uninitialized variable warnings, case 2.
+   Taken from cpphash.c (macroexpand) */
+/* { dg-do compile } */
+/* { dg-options "-O -Wuninitialized" } */
+
+struct definition
+{
+  int nargs;
+  int rest_args;
+};
+
+struct cpp_reader;
+
+enum cpp_token
+{
+  CPP_EOF, CPP_POP, CPP_COMMA, CPP_RPAREN
+};
+
+extern enum cpp_token macarg (struct cpp_reader *, int);
+
+void
+macroexpand (struct cpp_reader *pfile, struct definition *defn)
+{
+  int nargs = defn->nargs;
+
+  if (nargs >= 0)
+    {
+      enum cpp_token token;  /* { dg-bogus "token" "uninitialized variable warning" { xfail *-*-* } } */
+      int i, rest_args;
+      i = 0;
+      rest_args = 0;
+      do
+	{
+	  if (rest_args)
+	    continue;
+	  if (i < nargs || (nargs == 0 && i == 0))
+	    {
+	      /* if we are working on last arg which absorbs rest of args... */
+	      if (i == nargs - 1 && defn->rest_args)
+		rest_args = 1;
+	      token = macarg (pfile, rest_args);
+	    }
+	  else
+	    token = macarg (pfile, 0);
+	  if (token == CPP_EOF || token == CPP_POP)
+	    return;
+
+	  i++;
+	}
+      while (token == CPP_COMMA);
+    }
+}