re PR tree-optimization/22171 (gcc-4.0-20050623 internal compiler error in…

re PR tree-optimization/22171 (gcc-4.0-20050623 internal compiler error in linux/drivers/serial/8250.c)

	PR 22171
	* tree-ssa-operands.c (get_expr_operands): Check s_ann for NULL
	before use.

	PR 22171
	* gcc.dg/tree-ssa/pr22171.c: New test.

From-SVN: r101292

gcc/ChangeLog

+2005-06-24  Mark Mitchell  <mark@codesourcery.com>
+
+	PR 22171
+	* tree-ssa-operands.c (get_expr_operands): Check s_ann for NULL
+	before use.
+
 2005-06-23  Mark Mitchell  <mark@codesourcery.com>
 
 	PR 22000

gcc/testsuite/ChangeLog

+2005-06-24  Mark Mitchell  <mark@codesourcery.com>
+
+	PR 22171
+	* gcc.dg/tree-ssa/pr22171.c: New test.
+
 2005-06-24  Feng Wang  <fengwang@nudt.edu.cn>
 
 	* gfortran.dg/simplify_modulo.f90: New.

gcc/testsuite/gcc.dg/tree-ssa/pr22171.c

+/* { dg-options "-O2" } */
+
+static unsigned int old_serial_port_irq[10];
+
+static struct uart_8250_port {
+  volatile unsigned int slock;
+  unsigned int irq;
+} serial8250_ports[10];
+
+static __inline__ __attribute__((always_inline)) int irq_canonicalize(int irq)
+{
+  return ((irq == 2) ? 9 : irq);
+}
+
+void serial8250_isa_init_ports(void)
+{
+  struct uart_8250_port *up;
+  int i;
+
+  for (i = 0, up = serial8250_ports; i < 10; i++, up++)
+    up->irq = irq_canonicalize(old_serial_port_irq[i]);
+}
+
+int main(void)
+{
+  serial8250_isa_init_ports();
+  return 0;
+}