[PATCH] rs6000: Fix PR target/64115

[Ulrich Weigand]

Hello,

as discussed in the PR, this patch removes an invalid ENABLE_CHECKING
sanity check in rs6000_delegitimize_address, fixing the ICE.

Tested on powerpc64-linux.

OK for mainline / 4.9 / 4.8?

Bye,
Ulrich


ChangeLog:

        PR target/64115
        * config/rs6000/rs6000.c (rs6000_delegitimize_address): Remove
        invalid UNSPEC_TOCREL sanity check under ENABLE_CHECKING.

Index: gcc/config/rs6000/rs6000.c
===================================================================
--- gcc/config/rs6000/rs6000.c  (revision 218210)
+++ gcc/config/rs6000/rs6000.c  (working copy)
@@ -7033,24 +7033,6 @@
   if (GET_CODE (y) == UNSPEC
       && XINT (y, 1) == UNSPEC_TOCREL)
     {
-#ifdef ENABLE_CHECKING
-      if (REG_P (XVECEXP (y, 0, 1))
-         && REGNO (XVECEXP (y, 0, 1)) == TOC_REGISTER)
-       {
-         /* All good.  */
-       }
-      else if (GET_CODE (XVECEXP (y, 0, 1)) == DEBUG_EXPR)
-       {
-         /* Weirdness alert.  df_note_compute can replace r2 with a
-            debug_expr when this unspec is in a debug_insn.
-            Seen in gcc.dg/pr51957-1.c  */
-       }
-      else
-       {
-         debug_rtx (orig_x);
-         abort ();
-       }
-#endif
       y = XVECEXP (y, 0, 0);
 
 #ifdef HAVE_AS_TLS

-- 
  Dr. Ulrich Weigand
  GNU/Linux compilers and toolchain
  ulrich.weig...@de.ibm.com