[patch committed SH] Redefine TARGET_DELEGITIMIZE_ADDRESS

[Kaz Kojima <kkojima at rr dot iij4u dot or dot jp>]

Hi,

I've missed that there are many warnings like

  note: non-delegitimized UNSPEC 8 found in variable location

during building target libraries on my nightly build of
sh4-unknown-linux-gnu.  The attached patch adds a minimal
target delegitimize_address routine to fix these warnings.
Tested with bootstrap and the top level "make -k check"
on sh4-unknown-linux-gnu with no new failures.
Applied on trunk.

Regards,
	kaz
--
2010-11-01  Kaz Kojima  <kkojima@gcc.gnu.org>

	* config/sh/sh.c (TARGET_DELEGITIMIZE_ADDRESS): Redefine.
	(sh_delegitimize_address): New function.

--- ORIG/trunk/gcc/config/sh/sh.c	2010-10-31 09:38:09.000000000 +0900
+++ trunk/gcc/config/sh/sh.c	2010-11-01 22:58:40.000000000 +0900
@@ -255,6 +255,7 @@ static int sh_pr_n_sets (void);
 static rte sh_allocate_initial_value (rtx);
 static bool sh_legitimate_address_p (enum machine_mode, rtx, bool);
 static rtx sh_legitimize_address (rtx, rtx, enum machine_mode);
+static rtx sh_delegitimize_address (rtx);
 static int shmedia_target_regs_stack_space (HARD_REG_SET *);
 static int shmedia_reserve_space_for_target_registers_p (int, HARD_REG_SET *);
 static int shmedia_target_regs_stack_adjust (HARD_REG_SET *);
@@ -459,6 +460,9 @@ static const struct default_options sh_o
 #undef TARGET_SCHED_INIT
 #define TARGET_SCHED_INIT sh_md_init
 
+#undef TARGET_DELEGITIMIZE_ADDRESS
+#define TARGET_DELEGITIMIZE_ADDRESS sh_delegitimize_address
+
 #undef TARGET_LEGITIMIZE_ADDRESS
 #define TARGET_LEGITIMIZE_ADDRESS sh_legitimize_address
 
@@ -9873,6 +9877,45 @@ sh_legitimize_reload_address (rtx *p, en
   return true;
 }
 
+/* In the name of slightly smaller debug output, and to cater to
+   general assembler lossage, recognize various UNSPEC sequences
+   and turn them back into a direct symbol reference.  */
+
+static rtx
+sh_delegitimize_address (rtx orig_x)
+{
+  rtx x, y;
+
+  orig_x = delegitimize_mem_from_attrs (orig_x);
+
+  x = orig_x;
+  if (MEM_P (x))
+    x = XEXP (x, 0);
+  if (GET_CODE (x) == CONST)
+    {
+      y = XEXP (x, 0);
+      if (GET_CODE (y) == UNSPEC)
+	{
+	  if (XINT (y, 1) == UNSPEC_GOT
+	      || XINT (y, 1) == UNSPEC_GOTOFF)
+	    return XVECEXP (y, 0, 0);
+	  else if (TARGET_SHMEDIA
+		   && (XINT (y, 1) == UNSPEC_EXTRACT_S16
+		       || XINT (y, 1) == UNSPEC_EXTRACT_U16))
+	    {
+	      rtx offset = XVECEXP (y, 0, 1);
+
+	      x = gen_rtx_PLUS (Pmode, XVECEXP (y, 0, 0), offset);
+	      if (MEM_P (orig_x))
+		x = replace_equiv_address_nv (orig_x, x);
+	      return x;
+	    }
+	}
+    }
+
+  return orig_x;
+}
+
 /* Mark the use of a constant in the literal table. If the constant
    has multiple labels, make it unique.  */
 static rtx