[PATCH,rs6000,committed] Loosen assert in rs6000_emit_le_vsx_move

[Bill Schmidt]

Hi,

There's an assert in rs6000_emit_le_vsx_move () that was correct for
-mcpu=power7, but with the TImode changes for Power8, we can trigger the
assert with -mcpu=power8 on little endian.  We can now see a dest rtx
that is a vector subreg of TImode.  Allowing for this in the assert
fixes a failure in the test suite.

Bootstrapped and tested on powerpc64{,le}-unknown-linux-gnu with no
regressions.  Committed as obvious.

Thanks,
Bill


2014-02-23  Bill Schmidt  <wschm...@linux.vnet.ibm.com>

        * config/rs6000/rs6000.c (rs6000_emit_le_vsx_move): Relax assert
        to permit subregs.


Index: gcc/config/rs6000/rs6000.c
===================================================================
--- gcc/config/rs6000/rs6000.c  (revision 208050)
+++ gcc/config/rs6000/rs6000.c  (working copy)
@@ -8040,7 +8040,7 @@ rs6000_emit_le_vsx_move (rtx dest, rtx source, enu
 
   if (MEM_P (source))
     {
-      gcc_assert (REG_P (dest));
+      gcc_assert (REG_P (dest) || GET_CODE (dest) == SUBREG);
       rs6000_emit_le_vsx_load (dest, source, mode);
     }
   else