re PR rtl-optimization/13031 (ICE (unrecognizable insn) when building gnome-libs-1.4.2)

2003-12-20  Roger Sayle  <roger@eyesopen.com>

	PR optimization/13031
	* gcc.c-torture/compile/20031220-1.c: New test case.

From-SVN: r74892

gcc/testsuite/ChangeLog

+2003-12-20  Roger Sayle  <roger@eyesopen.com>
+
+	PR optimization/13031
+	* gcc.c-torture/compile/20031220-1.c: New test case.
+
 2003-12-20  Eric Botcazou  <ebotcazou@libertysurf.fr>
 
 	* gcc.dg/cast-function-1.c: New test.

gcc/testsuite/gcc.c-torture/compile/20031220-1.c

+/* PR optimization/13031  */
+/* The following code used to ICE on alphaev67-*-* at -O2 with an
+   unrecognizable instruction, caused by local register allocation
+   substituting a register for a constant in a conditional branch.  */
+
+void emit(int, int);
+int f(void);
+static int signals[5];
+
+static inline void select(int sel, void *klass)
+{
+  emit(klass ? 0 : f(), signals[sel ? 0 : 1]);
+}
+
+void all(void *gil, void *l, void *icon)
+{
+  while (l)
+    if (icon)
+      select(0, gil);
+}
+