* config/sparc/sparc.h: Remove dead code.

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

diff --git a/gcc/config/sparc/sparc.c b/gcc/config/sparc/sparc.c
index 3560ed9..2ab08fd 100644 (file)
--- a/gcc/config/sparc/sparc.c
+++ b/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.  */ ;