caller-save.c (save_call_clobbered_regs): Do not process sibcalls.

2007-02-15  Paolo Bonzini  <bonzini@gnu.org>

	* caller-save.c (save_call_clobbered_regs): Do not process sibcalls.

From-SVN: r121998

gcc/ChangeLog

+2007-02-15  Paolo Bonzini  <bonzini@gnu.org>
+
+	* caller-save.c (save_call_clobbered_regs): Do not process sibcalls.
+	
 2007-02-15  Nick Clifton  <nickc@redhat.com>
 
 	* varasm.c (default_asm_output_anchor): Prepend * to . symbol in

gcc/caller-save.c

@@ -407,7 +407,9 @@ save_call_clobbered_regs (void)
 		  regno += insert_restore (chain, 1, regno, MOVE_MAX_WORDS, save_mode);
 	    }
 
-	  if (code == CALL_INSN && ! find_reg_note (insn, REG_NORETURN, NULL))
+	  if (code == CALL_INSN
+	      && ! SIBLING_CALL_P (insn)
+	      && ! find_reg_note (insn, REG_NORETURN, NULL))
 	    {
 	      unsigned regno;
 	      HARD_REG_SET hard_regs_to_save;
@@ -450,11 +452,6 @@ save_call_clobbered_regs (void)
 		 during the call, but the subreg that is set isn't.  */
 	      CLEAR_HARD_REG_SET (this_insn_sets);
 	      note_stores (PATTERN (insn), mark_set_regs, &this_insn_sets);
-	      /* Sibcalls are considered to set the return value,
-		 compare flow.c:propagate_one_insn.  */
-	      if (SIBLING_CALL_P (insn) && current_function_return_rtx)
-		mark_set_regs (current_function_return_rtx, NULL_RTX,
-			       &this_insn_sets);
 
 	      /* Compute which hard regs must be saved before this call.  */
 	      AND_COMPL_HARD_REG_SET (hard_regs_to_save, call_fixed_reg_set);