sparc.h: Remove dead code.

	* config/sparc/sparc.h: Remove dead code.
	* config/sparc/sparc.c (sparc_compute_frame_size): Use
	FIRST_PARM_OFFSET for the size of the register window area.
	(emit_save_regs): Rename into emit_save_or_restore_regs.
	Add 'action' parameter.  Use 4095 as upper bound for the offset.
	Pass 'action' to save_or_restore_regs.
	(emit_restore_regs): Delete.
	(sparc_expand_prologue): Call emit_save_or_restore_regs.
	(sparc_expand_epilogue): Likewise.
	* config/sparc/sparc.md (mode macro P): Move.
	(movdi_insn_sp32_v9, movdi_insn_sp32): Swap.
	(mov<V32:mode> expander): Move to the top of the V32 section.
	(movdf_insn_sp32_v9_no_fpu, movdf_insn_sp32_v9): Swap.
	(movtf_insn_sp64_hq, movtf_insn_sp64): Swap.
	(sibcall_epilogue): Move.

From-SVN: r99609

gcc/ChangeLog

+2005-05-12  Eric Botcazou  <ebotcazou@libertysurf.fr>
+
+	* config/sparc/sparc.h: Remove dead code.
+	* config/sparc/sparc.c (sparc_compute_frame_size): Use
+	FIRST_PARM_OFFSET for the size of the register window area.
+	(emit_save_regs): Rename into emit_save_or_restore_regs.
+	Add 'action' parameter.  Use 4095 as upper bound for the offset.
+	Pass 'action' to save_or_restore_regs.
+	(emit_restore_regs): Delete.
+	(sparc_expand_prologue): Call emit_save_or_restore_regs.
+	(sparc_expand_epilogue): Likewise.
+	* config/sparc/sparc.md (mode macro P): Move.
+	(movdi_insn_sp32_v9, movdi_insn_sp32): Swap.
+	(mov<V32:mode> expander): Move to the top of the V32 section.
+	(movdf_insn_sp32_v9_no_fpu, movdf_insn_sp32_v9): Swap.
+	(movtf_insn_sp64_hq, movtf_insn_sp64): Swap.
+	(sibcall_epilogue): Move.
+
 2005-05-12  Richard Earnshaw  <richard.earnshaw@arm.com>
 
 	PR target/21501

gcc/config/sparc/sparc.c

@@ -318,8 +318,7 @@ static int set_extends (rtx);
 static void emit_pic_helper (void);
 static void load_pic_register (bool);
 static int save_or_restore_regs (int, int, rtx, int, int);
-static void emit_save_regs (void);
-static void emit_restore_regs (void);
+static void emit_save_or_restore_regs (int);
 static void sparc_asm_function_prologue (FILE *, HOST_WIDE_INT);
 static void sparc_asm_function_epilogue (FILE *, HOST_WIDE_INT);
 #ifdef OBJECT_FORMAT_ELF
@@ -3508,10 +3507,9 @@ sparc_compute_frame_size (HOST_WIDE_INT size, int leaf_function_p)
 
   /* Make sure nothing can clobber our register windows.
      If a SAVE must be done, or there is a stack-local variable,
-     the register window area must be allocated.
-     ??? For v8 we apparently need an additional 8 bytes of reserved space.  */
+     the register window area must be allocated.  */
   if (! leaf_function_p || size > 0)
-    actual_fsize += (16 * UNITS_PER_WORD) + (TARGET_ARCH64 ? 0 : 8);
+    actual_fsize += FIRST_PARM_OFFSET (current_function_decl);
 
   return SPARC_STACK_ALIGN (actual_fsize);
 }
@@ -3623,14 +3621,14 @@ save_or_restore_regs (int low, int high, rtx base, int offset, int action)
 /* Emit code to save call-saved registers.  */
 
 static void
-emit_save_regs (void)
+emit_save_or_restore_regs (int action)
 {
   HOST_WIDE_INT offset;
   rtx base;
 
   offset = frame_base_offset - apparent_fsize;
 
-  if (offset < -4096 || offset + num_gfregs * 4 > 4096)
+  if (offset < -4096 || offset + num_gfregs * 4 > 4095)
     {
       /* ??? This might be optimized a little as %g1 might already have a
 	 value close enough that a single add insn will do.  */
@@ -3648,34 +3646,8 @@ emit_save_regs (void)
   else
     base = frame_base_reg;
 
-  offset = save_or_restore_regs (0, 8, base, offset, SORR_SAVE);
-  save_or_restore_regs (32, TARGET_V9 ? 96 : 64, base, offset, SORR_SAVE);
-}
-
-/* Emit code to restore call-saved registers.  */
-
-static void
-emit_restore_regs (void)
-{
-  HOST_WIDE_INT offset;
-  rtx base;
-
-  offset = frame_base_offset - apparent_fsize;
-
-  if (offset < -4096 || offset + num_gfregs * 4 > 4096 - 8 /*double*/)
-    {
-      base = gen_rtx_REG (Pmode, 1);
-      emit_move_insn (base, GEN_INT (offset));
-      emit_insn (gen_rtx_SET (VOIDmode,
-			      base,
-			      gen_rtx_PLUS (Pmode, frame_base_reg, base)));
-      offset = 0;
-    }
-  else
-    base = frame_base_reg;
-
-  offset = save_or_restore_regs (0, 8, base, offset, SORR_RESTORE);
-  save_or_restore_regs (32, TARGET_V9 ? 96 : 64, base, offset, SORR_RESTORE);
+  offset = save_or_restore_regs (0, 8, base, offset, action);
+  save_or_restore_regs (32, TARGET_V9 ? 96 : 64, base, offset, action);
 }
 
 /* Generate a save_register_window insn.  */
@@ -3814,9 +3786,8 @@ sparc_expand_prologue (void)
         RTX_FRAME_RELATED_P (XVECEXP (PATTERN (insn), 0, i)) = 1;
     }
 
-  /* Call-saved registers are saved just above the outgoing argument area.  */
   if (num_gfregs)
-    emit_save_regs ();
+    emit_save_or_restore_regs (SORR_SAVE);
 
   /* Load the PIC register if needed.  */
   if (flag_pic && current_function_uses_pic_offset_table)
@@ -3824,12 +3795,7 @@ sparc_expand_prologue (void)
 }
  
 /* This function generates the assembly code for function entry, which boils
-   down to emitting the necessary .register directives.
-
-   ??? Historical cruft: "On SPARC, move-double insns between fpu and cpu need
-   an 8-byte block of memory.  If any fpu reg is used in the function, we
-   allocate such a block here, at the bottom of the frame, just in case it's
-   needed."  Could this explain the -8 in emit_restore_regs?  */
+   down to emitting the necessary .register directives.  */
 
 static void
 sparc_asm_function_prologue (FILE *file, HOST_WIDE_INT size ATTRIBUTE_UNUSED)
@@ -3847,7 +3813,7 @@ void
 sparc_expand_epilogue (void)
 {
   if (num_gfregs)
-    emit_restore_regs ();
+    emit_save_or_restore_regs (SORR_RESTORE);
 
   if (actual_fsize == 0)
     /* do nothing.  */ ;

gcc/config/sparc/sparc.h

@@ -906,9 +906,6 @@ extern int sparc_mode_class[];
 /* Specify the registers used for certain standard purposes.
    The values of these macros are register numbers.  */
 
-/* SPARC pc isn't overloaded on a register that the compiler knows about.  */
-/* #define PC_REGNUM  */
-
 /* Register to use for pushing function arguments.  */
 #define STACK_POINTER_REGNUM 14
 
@@ -1375,16 +1372,12 @@ extern char leaf_reg_remap[];
    If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
    first local allocated.  Otherwise, it is the offset to the BEGINNING
    of the first local allocated.  */
-/* This allows space for one TFmode floating point value.  */
+/* This allows space for one TFmode floating point value, which is used
+   by SECONDARY_MEMORY_NEEDED_RTX.  */
 #define STARTING_FRAME_OFFSET \
   (TARGET_ARCH64 ? -16 \
    : (-SPARC_STACK_ALIGN (LONG_DOUBLE_TYPE_SIZE / BITS_PER_UNIT)))
 
-/* If we generate an insn to push BYTES bytes,
-   this says how many the stack pointer really advances by.
-   On SPARC, don't define this because there are no push insns.  */
-/*  #define PUSH_ROUNDING(BYTES) */
-
 /* Offset of first parameter from the argument pointer register value.
    !v9: This is 64 for the ins and locals, plus 4 for the struct-return reg
    even if this function isn't going to use it.