re PR rtl-optimization/26449 (ICE in loop invariant motion)

	PR rtl-optimization/26449
	* loop-invariant.c (move_invariant_reg): Fail if force_operand fails.

	* gcc.dg/pr26449.c: New test.

From-SVN: r114481

gcc/ChangeLog

+2006-06-07  Zdenek Dvorak <dvorakz@suse.cz>
+
+	PR rtl-optimization/26449
+	* loop-invariant.c (move_invariant_reg): Fail if force_operand fails.
+
 2006-06-07  Andrew MacLeod  <amacleod@redhat.com>
 
 	PR middle-end/27793

gcc/loop-invariant.c

@@ -1178,6 +1178,11 @@ move_invariant_reg (struct loop *loop, unsigned invno)
 	{
 	  start_sequence ();
 	  op = force_operand (SET_SRC (set), reg);
+	  if (!op)
+	    {
+	      end_sequence ();
+	      goto fail;
+	    }
 	  if (op != reg)
 	    emit_move_insn (reg, op);
 	  seq = get_insns ();

gcc/testsuite/ChangeLog

+2006-06-07  Zdenek Dvorak <dvorakz@suse.cz>
+
+	PR rtl-optimization/26449
+	* gcc.dg/pr26449.c: New test.
+
 2006-06-07  Volker Reichelt  <reichelt@igpm.rwth-aachen.de>
 
 	PR c++/27601

gcc/testsuite/gcc.dg/pr26449.c

+/* { dg-do compile { target i?86-*-* } } */
+/* { dg-options "-O1 -ftree-vectorize -march=pentium4 -std=c99" } */
+
+void matmul_i4 (int bbase_yn, int xcount)
+{
+  int x;
+  int * restrict dest_y;
+  const int * abase_n;
+
+  for (x = 0;  x < xcount;  x++)
+    {
+      dest_y[x] += abase_n[x] * bbase_yn; 
+    }
+}
+