PR middle-end/77721 - -Wformat-length not uses arg range for converted vars

gcc/testsuite/ChangeLog:
	PR middle-end/77721
	* gcc.dg/tree-ssa/builtin-sprintf-warn-6.c: New test.

From-SVN: r240595

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2016-09-28  Martin Sebor  <msebor@redhat.com>
+
+	PR middle-end/77721
+	* gcc.dg/tree-ssa/builtin-sprintf-warn-6.c: New test.
+
 2016-09-28  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
 	PR libgfortran/77707

gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-6.c

@@ -0,0 +1,92 @@
+/* PR middle-end/77721 - -Wformat-length not uses arg range for converted vars
+   Test to verify that the correct range information is made available to the
+   -Wformat-lenght check to prevent warnings.  */
+/* { dg-do compile } */
+/* { dg-options "-O2 -Wformat -Wformat-length" } */
+
+int snprintf (char*, __SIZE_TYPE__, const char*, ...);
+
+void fuchar (unsigned char j, char *p)
+{
+  if (j > 99)
+    return;
+  snprintf (p, 4, "%3hu", j);
+}
+
+void fschar (signed char j, char *p)
+{
+  const unsigned char k = (unsigned char) j;
+
+  if (k > 99)
+    return;
+
+  snprintf (p, 3, "%3hhu", k);   /* { dg-bogus "" "unsigned char" { xfail *-*-* } } */
+}
+
+void fushrt (unsigned short j, char *p)
+{
+  if (j > 999)
+    return;
+  snprintf (p, 4, "%3hu", j);
+}
+
+void fshrt (short j, char *p)
+{
+  const unsigned short k = (unsigned short) j;
+
+  if (k > 999)
+    return;
+
+  snprintf (p, 4, "%3hu", k);
+}
+
+void fuint (unsigned j, char *p)
+{
+  if (j > 999)
+    return;
+  snprintf (p, 4, "%3u", j);
+}
+
+void fint (int j, char *p)
+{
+  const unsigned k = (unsigned) j;
+
+  if (k > 999)
+    return;
+
+  snprintf (p, 4, "%3u", k);   /* { dg-bogus "" "unsigned int" { xfail *-*-* } } */
+}
+
+void fulong (unsigned long j, char *p)
+{
+  if (j > 999)
+    return;
+  snprintf (p, 4, "%3lu", j);
+}
+
+void flong (long j, char *p)
+{
+  const unsigned long k = (unsigned long) j;
+
+  if (k > 999)
+    return;
+
+  snprintf (p, 4, "%3lu", k);   /* { dg-bogus "" "unsigned long" { xfail *-*-* } } */
+}
+
+void fullong (unsigned long long j, char *p)
+{
+  if (j > 999)
+    return;
+  snprintf (p, 4, "%3llu", j);
+}
+
+void fllong (long j, char *p)
+{
+  const unsigned long long k = (unsigned long long) j;
+
+  if (k > 999)
+    return;
+
+  snprintf (p, 4, "%3llu", k);   /* { dg-bogus "" "unsigned long long" { xfail *-*-* } } */
+}