PATCH: Fix loop.c for targets without HAVE_prefetch

[H . J . Lu]

On Wed, Jan 23, 2002 at 12:23:45AM -0500, John David Anglin wrote:
> > > This patch
> > > 
> > > http://gcc.gnu.org/ml/gcc-patches/2002-01/msg01393.html
> 
> causes a new warning when PREFETCH_NOT_ALWAYS is 0:
> 
> ../../gcc/gcc/loop.c:3573: warning: `check_store' defined but not used
> 

Here is a new patch.


H.J.
----
2002-01-23  H.J. Lu  (hjl@gnu.org)

	* loop.c (HAVE_prefetch): Don't define if not defined.
	(CODE_FOR_prefetch): Removed.
	(gen_prefetch): Removed.
	(check_store): Define only if HAVE_prefetch is
	defined.
	(emit_prefetch_instructions): Likewise.
	(rtx_equal_for_prefetch_p): Likewise.
	(remove_constant_addition): Likewise.

--- gcc/loop.c.prefetch	Wed Jan 23 09:00:37 2002
+++ gcc/loop.c	Wed Jan 23 12:08:49 2002
@@ -63,11 +63,6 @@ Software Foundation, 59 Temple Place - S
 #ifndef PREFETCH_BLOCK
 #define PREFETCH_BLOCK 32
 #endif
-#ifndef HAVE_prefetch
-#define HAVE_prefetch 0
-#define CODE_FOR_prefetch 0
-#define gen_prefetch(a,b,c) (abort(), NULL_RTX)
-#endif
 
 /* Give up the prefetch optimizations once we exceed a given threshhold.
    It is unlikely that we would be able to optimize something in a loop
@@ -352,7 +347,6 @@ static rtx loop_insn_sink_or_swim PARAMS
 
 static void loop_dump_aux PARAMS ((const struct loop *, FILE *, int));
 static void loop_delete_insns PARAMS ((rtx, rtx));
-static HOST_WIDE_INT remove_constant_addition PARAMS ((rtx *));
 void debug_ivs PARAMS ((const struct loop *));
 void debug_iv_class PARAMS ((const struct iv_class *));
 void debug_biv PARAMS ((const struct induction *));
@@ -3566,6 +3560,8 @@ struct check_store_data
   int mem_write;
 };
 
+#ifdef HAVE_prefetch
+static HOST_WIDE_INT remove_constant_addition PARAMS ((rtx *));
 static void check_store PARAMS ((rtx, rtx, void *));
 static void emit_prefetch_instructions PARAMS ((struct loop *));
 static int rtx_equal_for_prefetch_p PARAMS ((rtx, rtx));
@@ -4069,6 +4065,7 @@ emit_prefetch_instructions (loop)
 
   return;
 }
+#endif
 
 /* A "basic induction variable" or biv is a pseudo reg that is set
    (within this loop) only by incrementing or decrementing it.  */