regset.h (fixed_reg_set_regset): Declare.

        * regset.h (fixed_reg_set_regset): Declare.
        * dse.c: Include regset.h .
        (struct insn_info): Add member fixed_regs_live.
        (note_add_store_info): New typedef.
        (note_add_store): New function.
        (emit_inc_dec_insn_before): Expect arg to be of type insn_info_t .
        Use gen_add3_insn / gen_move_insn.
        Check new insn for unwanted clobbers before emitting it.
        (check_for_inc_dec): Rename to...
        (check_for_inc_dec_1:) ... this.  Return bool.  Take insn_info
        parameter.  Changed all callers in file.
        (check_for_inc_dec, copy_fixed_regs): New functions.
        (scan_insn): Set fixed_regs_live field of insn_info.
        * rtl.h (check_for_inc_dec): Update prototype.
        * postreload.c (reload_cse_simplify): Take new signature of
        check_ind_dec into account.
        * reginfo.c (fixed_reg_set_regset): New variable.
        (init_reg_sets_1): Initialize it.

Co-Authored-By: Eric Botcazou <ebotcazou@adacore.com>

From-SVN: r181046

1 files changed, 12 insertions, 2 deletions

diff --git a/gcc/reginfo.c b/gcc/reginfo.c
index 5373641..e9bf65f 100644
--- a/gcc/reginfo.c
+++ b/gcc/reginfo.c
@@ -1,7 +1,7 @@
 /* Compute different info about registers.
    Copyright (C) 1987, 1988, 1991, 1992, 1993, 1994, 1995, 1996
    1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
-   2009, 2010  Free Software Foundation, Inc.
+   2009, 2010, 2011  Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -94,6 +94,9 @@ static tree GTY(()) global_regs_decl[FIRST_PSEUDO_REGISTER];
    in dataflow more conveniently.  */
 regset regs_invalidated_by_call_regset;
 
+/* Same information as FIXED_REG_SET but in regset form.  */
+regset fixed_reg_set_regset;
+
 /* The bitmap_obstack is used to hold some static variables that
    should not be reset after each function is compiled.  */
 static bitmap_obstack persistent_obstack;
@@ -451,6 +454,10 @@ init_reg_sets_1 (void)
     }
   else
     CLEAR_REG_SET (regs_invalidated_by_call_regset);
+  if (!fixed_reg_set_regset)
+    fixed_reg_set_regset = ALLOC_REG_SET (&persistent_obstack);
+  else
+    CLEAR_REG_SET (fixed_reg_set_regset);
 
   for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
     {
@@ -462,7 +469,10 @@ init_reg_sets_1 (void)
 #endif
 
       if (fixed_regs[i])
-	SET_HARD_REG_BIT (fixed_reg_set, i);
+	{
+	  SET_HARD_REG_BIT (fixed_reg_set, i);
+	  SET_REGNO_REG_SET (fixed_reg_set_regset, i);
+	}
 
       if (call_used_regs[i])
 	SET_HARD_REG_BIT (call_used_reg_set, i);