+1998-10-06 Ken Raeburn <raeburn@cygnus.com>
+
+ * special/981006-1.c: New test. Make sure gcc doesn't lose track
+ of the possible targets of tablejump insns.
+ * special/special.exp: Run it.
+
Thu Oct 1 17:15:26 1998 Nick Clifton <nickc@cygnus.com>
* compile/981001-1.c: New test.
--- /dev/null
+/* Test that tablejump insns are correctly handled. If the compiler
+ loses track of the jump targets, it will report that x and y can be
+ used uninitialized.
+
+ This is broken in egcs 1998/10/06 for mips in pic mode. */
+/* { dg-do compile } */
+
+int foo (int a, int b)
+{
+ __label__ z;
+ int x; /* { dg-bogus "warning: `.' might be used uninitialized in this function" } */
+ int y; /* { dg-bogus "warning: `.' might be used uninitialized in this function" } */
+ static void *p;
+
+ switch (a) {
+ case 2:
+ x = 4;
+ break;
+ case 4:
+ x = 6;
+ break;
+ case 8: case 10: case 13: case 11: case 17: case 19:
+ x = 7;
+ break;
+ default:
+ x = -1;
+ break;
+ }
+ switch (b) {
+ case 2:
+ y = 4;
+ break;
+ case 4:
+ y = 6;
+ break;
+ case 8: case 10: case 13: case 11: case 17: case 19:
+ y = 7;
+ break;
+ default:
+ y = -1;
+ break;
+ }
+ z:
+ p = &&z;
+ return x * y;
+}
+int main (int argc, char *argv[])
+{
+ return 1 == foo (argc, argc + 1);
+}
################## ADD NEXT CASE HERE (NOT AT THE END) ##################
+# 981006-1
+# For MIPS at least, pic is needed to trigger the problem.
+dg-init
+if { [istarget rs6000-*-aix*]
+ || [istarget powerpc*-*-aix*]
+ || [istarget arm*-*-*]
+} {
+ set extra_flags ""
+} else {
+ set extra_flags "-fpic"
+}
+dg-runtest $srcdir/$subdir/981006-1.c "-Wuninitialized -O2 $extra_flags" ""
+dg-finish
+
# 921210-1
set lines [gcc_target_compile $srcdir/$subdir/921210-1.c "" preprocess ""]
set lines [prune [split [prune_warnings [prune_gcc_output $lines]] "\n"] ""]