re PR rtl-optimization/41646 (Reload ICE due to combiner extending life time of a hard register)

	PR rtl-optimization/41646
	* calls.c (expand_call): For BLKmode types returned in registers
	avoid likely spilled hard regs in copy_blkmode_from_reg generated
	insns.

	* gcc.c-torture/compile/pr41646.c: New test.

From-SVN: r152597

gcc/ChangeLog

+2009-10-09  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/41646
+	* calls.c (expand_call): For BLKmode types returned in registers
+	avoid likely spilled hard regs in copy_blkmode_from_reg generated
+	insns.
+
 2009-10-09  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/41634

gcc/calls.c

@@ -3020,7 +3020,10 @@ expand_call (tree exp, rtx target, int ignore)
 	}
       else if (TYPE_MODE (rettype) == BLKmode)
 	{
-	  target = copy_blkmode_from_reg (target, valreg, rettype);
+	  rtx val = valreg;
+	  if (GET_MODE (val) != BLKmode)
+	    val = avoid_likely_spilled_reg (val);
+	  target = copy_blkmode_from_reg (target, val, rettype);
 
 	  /* We can not support sibling calls for this case.  */
 	  sibcall_failure = 1;

gcc/testsuite/ChangeLog

+2009-10-09  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/41646
+	* gcc.c-torture/compile/pr41646.c: New test.
+
 2009-10-09  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/41634

gcc/testsuite/gcc.c-torture/compile/pr41646.c

+/* PR rtl-optimization/41646 */
+
+struct A { unsigned long a; };
+struct B { unsigned short b, c, d; };
+struct B bar (unsigned long);
+
+char *
+foo (char *a, struct A *x)
+{
+  struct B b = bar (x->a);
+  unsigned char c;
+  unsigned short d;
+  a[3] = ((unsigned char) (b.b % 10) + 48);
+  d = b.b / 10;
+  a[2] = ((unsigned char) (d % 10) + 48);
+  d = d / 10;
+  a[1] = ((unsigned char) (d % 10) + 48);
+  a[0] = ((unsigned char) ((d / 10) % 10) + 48);
+  a[4] = 46;
+  c = (unsigned char) b.c;
+  a[6] = (c % 10 + 48);
+  a[5] = ((c / 10) % 10 + 48);
+  a[7] = 46;
+  c = b.d;
+  a[9] = (c % 10 + 48);
+  a[8] = ((c / 10) % 10 + 48);
+  return a + 10;
+}