remove more ifdef HAVE_cc0

gcc/ChangeLog:

2015-04-21  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* combine.c (find_single_use): Remove HAVE_cc0 ifdef for code
	that is trivially ded on non cc0 targets.
	(simplify_set): Likewise.
	(mark_used_regs_combine): Likewise.
	* cse.c (new_basic_block): Likewise.
	(fold_rtx): Likewise.
	(cse_insn): Likewise.
	(cse_extended_basic_block): Likewise.
	(set_live_p): Likewise.
	* rtlanal.c (canonicalize_condition): Likewise.
	* simplify-rtx.c (simplify_binary_operation_1): Likewise.

From-SVN: r222295

5 files changed, 16 insertions, 29 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4448d31..9d51cd6 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,19 @@
 2015-04-21  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
 
+	* combine.c (find_single_use): Remove HAVE_cc0 ifdef for code
+	that is trivially ded on non cc0 targets.
+	(simplify_set): Likewise.
+	(mark_used_regs_combine): Likewise.
+	* cse.c (new_basic_block): Likewise.
+	(fold_rtx): Likewise.
+	(cse_insn): Likewise.
+	(cse_extended_basic_block): Likewise.
+	(set_live_p): Likewise.
+	* rtlanal.c (canonicalize_condition): Likewise.
+	* simplify-rtx.c (simplify_binary_operation_1): Likewise.
+
+2015-04-21  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
+
 	* conditions.h: Define macros even if HAVE_cc0 is undefined.
 	* emit-rtl.c: Define functions even if HAVE_cc0 is undefined.
 	* final.c: Likewise.
diff --git a/gcc/combine.c b/gcc/combine.c
index 46cd6db..0a35b8f 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -686,7 +686,6 @@ find_single_use (rtx dest, rtx_insn *insn, rtx_insn **ploc)
   rtx *result;
   struct insn_link *link;
 
-#ifdef HAVE_cc0
   if (dest == cc0_rtx)
     {
       next = NEXT_INSN (insn);
@@ -699,7 +698,6 @@ find_single_use (rtx dest, rtx_insn *insn, rtx_insn **ploc)
 	*ploc = next;
       return result;
     }
-#endif
 
   if (!REG_P (dest))
     return 0;
@@ -6724,7 +6722,6 @@ simplify_set (rtx x)
       src = SET_SRC (x), dest = SET_DEST (x);
     }
 
-#ifdef HAVE_cc0
   /* If we have (set (cc0) (subreg ...)), we try to remove the subreg
      in SRC.  */
   if (dest == cc0_rtx
@@ -6744,7 +6741,6 @@ simplify_set (rtx x)
 	  src = SET_SRC (x);
 	}
     }
-#endif
 
 #ifdef LOAD_EXTEND_OP
   /* If we have (set FOO (subreg:M (mem:N BAR) 0)) with M wider than N, this
@@ -13193,11 +13189,9 @@ mark_used_regs_combine (rtx x)
     case ADDR_VEC:
     case ADDR_DIFF_VEC:
     case ASM_INPUT:
-#ifdef HAVE_cc0
     /* CC0 must die in the insn after it is set, so we don't need to take
        special note of it here.  */
     case CC0:
-#endif
       return;
 
     case CLOBBER:
diff --git a/gcc/cse.c b/gcc/cse.c
index d7638f0..ef5eb8c 100644
--- a/gcc/cse.c
+++ b/gcc/cse.c
@@ -281,7 +281,6 @@ struct qty_table_elem
 /* The table of all qtys, indexed by qty number.  */
 static struct qty_table_elem *qty_table;
 
-#ifdef HAVE_cc0
 /* For machines that have a CC0, we do not record its value in the hash
    table since its use is guaranteed to be the insn immediately following
    its definition and any other insn is presumed to invalidate it.
@@ -293,7 +292,6 @@ static struct qty_table_elem *qty_table;
 
 static rtx this_insn_cc0, prev_insn_cc0;
 static machine_mode this_insn_cc0_mode, prev_insn_cc0_mode;
-#endif
 
 /* Insn being scanned.  */
 
@@ -884,9 +882,7 @@ new_basic_block (void)
 	}
     }
 
-#ifdef HAVE_cc0
   prev_insn_cc0 = 0;
-#endif
 }
 
 /* Say that register REG contains a quantity in mode MODE not in any
@@ -3175,10 +3171,8 @@ fold_rtx (rtx x, rtx_insn *insn)
     case EXPR_LIST:
       return x;
 
-#ifdef HAVE_cc0
     case CC0:
       return prev_insn_cc0;
-#endif
 
     case ASM_OPERANDS:
       if (insn)
@@ -3232,7 +3226,6 @@ fold_rtx (rtx x, rtx_insn *insn)
 	    const_arg = folded_arg;
 	    break;
 
-#ifdef HAVE_cc0
 	  case CC0:
 	    /* The cc0-user and cc0-setter may be in different blocks if
 	       the cc0-setter potentially traps.  In that case PREV_INSN_CC0
@@ -3256,7 +3249,6 @@ fold_rtx (rtx x, rtx_insn *insn)
 		const_arg = equiv_constant (folded_arg);
 	      }
 	    break;
-#endif
 
 	  default:
 	    folded_arg = fold_rtx (folded_arg, insn);
@@ -4531,11 +4523,9 @@ cse_insn (rtx_insn *insn)
     sets = XALLOCAVEC (struct set, XVECLEN (x, 0));
 
   this_insn = insn;
-#ifdef HAVE_cc0
   /* Records what this insn does to set CC0.  */
   this_insn_cc0 = 0;
   this_insn_cc0_mode = VOIDmode;
-#endif
 
   /* Find all regs explicitly clobbered in this insn,
      to ensure they are not replaced with any other regs
@@ -5550,7 +5540,6 @@ cse_insn (rtx_insn *insn)
 	    }
 	}
 
-#ifdef HAVE_cc0
       /* If setting CC0, record what it was set to, or a constant, if it
 	 is equivalent to a constant.  If it is being set to a floating-point
 	 value, make a COMPARE with the appropriate constant of 0.  If we
@@ -5565,7 +5554,6 @@ cse_insn (rtx_insn *insn)
 	    this_insn_cc0 = gen_rtx_COMPARE (VOIDmode, this_insn_cc0,
 					     CONST0_RTX (mode));
 	}
-#endif
     }
 
   /* Now enter all non-volatile source expressions in the hash table
@@ -6613,11 +6601,9 @@ cse_extended_basic_block (struct cse_basic_block_data *ebb_data)
 	  record_jump_equiv (insn, taken);
 	}
 
-#ifdef HAVE_cc0
       /* Clear the CC0-tracking related insns, they can't provide
 	 useful information across basic block boundaries.  */
       prev_insn_cc0 = 0;
-#endif
     }
 
   gcc_assert (next_qty <= max_qty);
@@ -6868,21 +6854,17 @@ static bool
 set_live_p (rtx set, rtx_insn *insn ATTRIBUTE_UNUSED, /* Only used with HAVE_cc0.  */
 	    int *counts)
 {
-#ifdef HAVE_cc0
   rtx tem;
-#endif
 
   if (set_noop_p (set))
     ;
 
-#ifdef HAVE_cc0
   else if (GET_CODE (SET_DEST (set)) == CC0
 	   && !side_effects_p (SET_SRC (set))
 	   && ((tem = next_nonnote_nondebug_insn (insn)) == NULL_RTX
 	       || !INSN_P (tem)
 	       || !reg_referenced_p (cc0_rtx, PATTERN (tem))))
     return false;
-#endif
   else if (!is_dead_reg (SET_DEST (set), counts)
 	   || side_effects_p (SET_SRC (set)))
     return true;
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c
index 743aad6..2377f25a 100644
--- a/gcc/rtlanal.c
+++ b/gcc/rtlanal.c
@@ -5035,7 +5035,6 @@ canonicalize_condition (rtx_insn *insn, rtx cond, int reverse,
       /* Set nonzero when we find something of interest.  */
       rtx x = 0;
 
-#ifdef HAVE_cc0
       /* If comparison with cc0, import actual comparison from compare
 	 insn.  */
       if (op0 == cc0_rtx)
@@ -5051,7 +5050,6 @@ canonicalize_condition (rtx_insn *insn, rtx cond, int reverse,
 	  if (earliest)
 	    *earliest = prev;
 	}
-#endif
 
       /* If this is a COMPARE, pick up the two things being compared.  */
       if (GET_CODE (op0) == COMPARE)
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c
index 4b18d3c..b85ef99 100644
--- a/gcc/simplify-rtx.c
+++ b/gcc/simplify-rtx.c
@@ -2180,15 +2180,14 @@ simplify_binary_operation_1 (enum rtx_code code, machine_mode mode,
 	  rtx xop00 = XEXP (op0, 0);
 	  rtx xop10 = XEXP (op1, 0);
 
-#ifdef HAVE_cc0
 	  if (GET_CODE (xop00) == CC0 && GET_CODE (xop10) == CC0)
-#else
+	      return xop00;
+
 	    if (REG_P (xop00) && REG_P (xop10)
 		&& GET_MODE (xop00) == GET_MODE (xop10)
 		&& REGNO (xop00) == REGNO (xop10)
 		&& GET_MODE_CLASS (GET_MODE (xop00)) == MODE_CC
 		&& GET_MODE_CLASS (GET_MODE (xop10)) == MODE_CC)
-#endif
 	      return xop00;
 	}
       break;