Backported from mainline

[pf3gnuchains/gcc-fork.git] / gcc / config / sh / sh.c

diff --git a/gcc/config/sh/sh.c b/gcc/config/sh/sh.c
index 1282414..82c780f 100644 (file)
--- a/gcc/config/sh/sh.c
+++ b/gcc/config/sh/sh.c
@@ -1,6 +1,6 @@
 /* Output routines for GCC for Renesas / SuperH SH.
    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
-   2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
+   2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
    Free Software Foundation, Inc.
    Contributed by Steve Chamberlain (sac@cygnus.com).
    Improved by Jim Wilson (wilson@cygnus.com).
@@ -11497,8 +11497,15 @@ sh_register_move_cost (enum machine_mode mode,
        && REGCLASS_HAS_GENERAL_REG (srcclass))
       || (REGCLASS_HAS_GENERAL_REG (dstclass)
          && REGCLASS_HAS_FP_REG (srcclass)))
-    return ((TARGET_SHMEDIA ? 4 : TARGET_FMOVD ? 8 : 12)
-           * ((GET_MODE_SIZE (mode) + 7) / 8U));
+    {
+      /* Discourage trying to use fp regs for a pointer.  This also
+        discourages fp regs with SImode because Pmode is an alias
+        of SImode on this target.  See PR target/48596.  */
+      int addend = (mode == Pmode) ? 40 : 0;
+
+      return (((TARGET_SHMEDIA ? 4 : TARGET_FMOVD ? 8 : 12) + addend)
+             * ((GET_MODE_SIZE (mode) + 7) / 8U));
+    }
 
   if ((dstclass == FPUL_REGS
        && REGCLASS_HAS_GENERAL_REG (srcclass))