re PR rtl-optimization/32069 (segfault in regclass() with -O0 -fsplit-wide-types)

	PR rtl-optimization/32069
	* regclass.c (regclass): Don't crash if the entry in regno_reg_rtx
	is NULL.

From-SVN: r125043

gcc/ChangeLog

+2007-05-24  Ian Lance Taylor  <iant@google.com>
+
+	PR rtl-optimization/32069
+	* regclass.c (regclass): Don't crash if the entry in regno_reg_rtx
+	is NULL.
+
 2007-05-24  Ollie Wild  <aaw@google.com>
 
 	* doc/cpp.texi (Common Predefined Macros): Add __COUNTER__

gcc/regclass.c

@@ -1214,6 +1214,9 @@ regclass (rtx f, int nregs)
 	  int class;
 	  struct costs *p = &costs[i];
 
+	  if (regno_reg_rtx[i] == NULL)
+	    continue;
+
 	  /* In non-optimizing compilation REG_N_REFS is not initialized
 	     yet.  */
 	  if (optimize && !REG_N_REFS (i) && !REG_N_SETS (i))

gcc/testsuite/gcc.dg/pr32069.c

+/* { dg-do-compile } */
+/* { dg-options "-O0 -fsplit-wide-types" } */
+
+long long int segfault (long long int a, long long int b)
+{
+  return a ^ b;
+}