patch to fix pr55141

[Vladimir Makarov]

  The following patch fixes

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55141

  The patch was successfully bootstrapped on x86/x86-64.

  Committed as rev. 194308.

2012-12-07  Vladimir Makarov  <vmaka...@redhat.com>

        testsuite/gcc.target/i386/pr55141.c
        * lra-constraints.c (lra_constraints): Use biggest mode for
        df_set_regs_ever_live.

2012-12-07  Vladimir Makarov  <vmaka...@redhat.com>

        PR rtl-optimization/55141
        * gcc.target/i386/pr55141.c: New.


Index: lra-constraints.c
===================================================================
--- lra-constraints.c   (revision 194307)
+++ lra-constraints.c   (working copy)
@@ -3329,8 +3329,9 @@ lra_constraints (bool first_p)
        reg = regno_reg_rtx[i];
        if ((hard_regno = lra_get_regno_hard_regno (i)) >= 0)
          {
-           int j, nregs = hard_regno_nregs[hard_regno][PSEUDO_REGNO_MODE (i)];
+           int j, nregs;
 
+           nregs = hard_regno_nregs[hard_regno][lra_reg_info[i].biggest_mode];
            for (j = 0; j < nregs; j++)
              df_set_regs_ever_live (hard_regno + j, true);
          }
Index: testsuite/gcc.target/i386/pr55141.c
===================================================================
--- testsuite/gcc.target/i386/pr55141.c (revision 0)
+++ testsuite/gcc.target/i386/pr55141.c (working copy)
@@ -0,0 +1,29 @@
+/* { dg-do run } */
+/* { dg-options "-O -fno-split-wide-types" } */
+
+typedef struct
+{
+  long int p_x, p_y;
+} Point;
+
+static __attribute__ ((noinline, noclone))
+     void foo (Point p0, Point p1, Point p2, Point p3)
+{
+  if (p0.p_x != 1
+      || p1.p_x != 3
+      || p2.p_x != 5
+      || p3.p_x != 7)
+    __builtin_abort ();
+}
+
+int
+main (int argc, char *argv[])
+{
+  Point p0, p1, p2, p3, p4, p5;
+  p0.p_x = 1;
+  p1.p_x = 3;
+  p2.p_x = 5;
+  p3.p_x = 7;
+  foo (p0, p1, p2, p3);
+  return 0;
+}