[PATCH Atom] PR target/51287 fix (avoid unrecognized instruction error)

[Ilya Enkovich]

Hello,

Here is a short patch to fix PR target/51287. Patch avoids
get_attr_type call for instructions which cannot be recognized.

Bootstrapped and checked on linux-x86_64. 252.eon also works fine with
this fix on Atom.

Could please someone review it?

Thanks,
Ilya
---
2011-11-24  Enkovich Ilya  <ilya.enkov...@intel.com>

        PR target/51287
        * i386.c (distance_non_agu_define_in_bb): Fix insn attr check.


diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 3436820..76b15f2 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -16457,7 +16457,6 @@ distance_non_agu_define_in_bb (unsigned int
regno1, unsigned int regno2,
   basic_block bb = start ? BLOCK_FOR_INSN (start) : NULL;
   rtx prev = start;
   rtx next = NULL;
-  enum attr_type insn_type;

   *found = false;

@@ -16470,8 +16469,8 @@ distance_non_agu_define_in_bb (unsigned int
regno1, unsigned int regno2,
          distance = increase_distance (prev, next, distance);
          if (insn_defines_reg (regno1, regno2, prev))
            {
-             insn_type = get_attr_type (prev);
-             if (insn_type != TYPE_LEA)
+             if (recog_memoized (prev) < 0
+                 || get_attr_type (prev) != TYPE_LEA)
                {
                  *found = true;
                  return distance;