[Patch 1/4] Simplify the representation of CCMP patterns by using

    2015-01-19  Wilco Dijkstra  <wdijkstr@arm.com>

    gcc/
        * target.def (gen_ccmp_first): Update documentation.
        (gen_ccmp_next): Likewise.
        * doc/tm.texi (gen_ccmp_first): Update documentation.
        (gen_ccmp_next): Likewise.
        * ccmp.c (expand_ccmp_expr): Extract cmp_code from return value of
        expand_ccmp_expr_1.  Improve comments.
        * config/aarch64/aarch64.md (ccmp_and): Use if_then_else for ccmp.
        (ccmp_ior<mode>): Remove pattern.
        (cmp<mode>): Remove expand.
        (cmp): Globalize pattern.
        (cstorecc4): Use cc_register.
        (mov<mode>cc): Remove ccmp_cc_register check.
        * config/aarch64/aarch64.c (aarch64_get_condition_code_1):
        Simplify after removal of CC_DNE/* modes.
        (aarch64_ccmp_mode_to_code): Remove.
        (aarch64_print_operand): Remove 'K' case.  Merge 'm' and 'M' cases.
        In 'k' case use integer as condition.
        (aarch64_nzcv_codes): Remove inverted cases.
        (aarch64_code_to_ccmode): Remove.
        (aarch64_gen_ccmp_first): Use cmp pattern directly.  Return the correct
        comparison with CC register to be used in folowing CCMP/branch/CSEL.
        (aarch64_gen_ccmp_next): Use previous comparison and mode in CCMP
        pattern.  Return the comparison with CC register.  Invert conditions
        when bitcode is OR.
        * config/aarch64/aarch64-modes.def: Remove CC_DNE/* modes.
        * config/aarch64/predicates.md (ccmp_cc_register): Remove.

From-SVN: r232561

4 files changed, 78 insertions, 322 deletions

diff --git a/gcc/config/aarch64/aarch64-modes.def b/gcc/config/aarch64/aarch64-modes.def
index 1c94b3c..3fab205 100644
--- a/gcc/config/aarch64/aarch64-modes.def
+++ b/gcc/config/aarch64/aarch64-modes.def
@@ -25,16 +25,6 @@ CC_MODE (CC_ZESWP); /* zero-extend LHS (but swap to make it RHS).  */
 CC_MODE (CC_SESWP); /* sign-extend LHS (but swap to make it RHS).  */
 CC_MODE (CC_NZ);    /* Only N and Z bits of condition flags are valid.  */
 CC_MODE (CC_Z);     /* Only Z bit of condition flags is valid.  */
-CC_MODE (CC_DNE);
-CC_MODE (CC_DEQ);
-CC_MODE (CC_DLE);
-CC_MODE (CC_DLT);
-CC_MODE (CC_DGE);
-CC_MODE (CC_DGT);
-CC_MODE (CC_DLEU);
-CC_MODE (CC_DLTU);
-CC_MODE (CC_DGEU);
-CC_MODE (CC_DGTU);
 
 /* Half-precision floating point for __fp16.  */
 FLOAT_MODE (HF, 2, 0);
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 73ef7e5..041e642 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -4205,7 +4205,6 @@ aarch64_get_condition_code (rtx x)
 static int
 aarch64_get_condition_code_1 (enum machine_mode mode, enum rtx_code comp_code)
 {
-  int ne = -1, eq = -1;
   switch (mode)
     {
     case CCFPmode:
@@ -4228,56 +4227,6 @@ aarch64_get_condition_code_1 (enum machine_mode mode, enum rtx_code comp_code)
 	}
       break;
 
-    case CC_DNEmode:
-      ne = AARCH64_NE;
-      eq = AARCH64_EQ;
-      break;
-
-    case CC_DEQmode:
-      ne = AARCH64_EQ;
-      eq = AARCH64_NE;
-      break;
-
-    case CC_DGEmode:
-      ne = AARCH64_GE;
-      eq = AARCH64_LT;
-      break;
-
-    case CC_DLTmode:
-      ne = AARCH64_LT;
-      eq = AARCH64_GE;
-      break;
-
-    case CC_DGTmode:
-      ne = AARCH64_GT;
-      eq = AARCH64_LE;
-      break;
-
-    case CC_DLEmode:
-      ne = AARCH64_LE;
-      eq = AARCH64_GT;
-      break;
-
-    case CC_DGEUmode:
-      ne = AARCH64_CS;
-      eq = AARCH64_CC;
-      break;
-
-    case CC_DLTUmode:
-      ne = AARCH64_CC;
-      eq = AARCH64_CS;
-      break;
-
-    case CC_DGTUmode:
-      ne = AARCH64_HI;
-      eq = AARCH64_LS;
-      break;
-
-    case CC_DLEUmode:
-      ne = AARCH64_LS;
-      eq = AARCH64_HI;
-      break;
-
     case CCmode:
       switch (comp_code)
 	{
@@ -4339,12 +4288,6 @@ aarch64_get_condition_code_1 (enum machine_mode mode, enum rtx_code comp_code)
       break;
     }
 
-  if (comp_code == NE)
-    return ne;
-
-  if (comp_code == EQ)
-    return eq;
-
   return -1;
 }
 
@@ -4385,69 +4328,27 @@ aarch64_const_vec_all_same_int_p (rtx x, HOST_WIDE_INT val)
 #define AARCH64_CC_Z (1 << 2)
 #define AARCH64_CC_N (1 << 3)
 
-/* N Z C V flags for ccmp.  The first code is for AND op and the other
-   is for IOR op.  Indexed by AARCH64_COND_CODE.  */
-static const int aarch64_nzcv_codes[][2] =
-{
-  {AARCH64_CC_Z, 0}, /* EQ, Z == 1.  */
-  {0, AARCH64_CC_Z}, /* NE, Z == 0.  */
-  {AARCH64_CC_C, 0}, /* CS, C == 1.  */
-  {0, AARCH64_CC_C}, /* CC, C == 0.  */
-  {AARCH64_CC_N, 0}, /* MI, N == 1.  */
-  {0, AARCH64_CC_N}, /* PL, N == 0.  */
-  {AARCH64_CC_V, 0}, /* VS, V == 1.  */
-  {0, AARCH64_CC_V}, /* VC, V == 0.  */
-  {AARCH64_CC_C, 0}, /* HI, C ==1 && Z == 0.  */
-  {0, AARCH64_CC_C}, /* LS, !(C == 1 && Z == 0).  */
-  {0, AARCH64_CC_V}, /* GE, N == V.  */
-  {AARCH64_CC_V, 0}, /* LT, N != V.  */
-  {0, AARCH64_CC_Z}, /* GT, Z == 0 && N == V.  */
-  {AARCH64_CC_Z, 0}, /* LE, !(Z == 0 && N == V).  */
-  {0, 0}, /* AL, Any.  */
-  {0, 0}, /* NV, Any.  */
+/* N Z C V flags for ccmp.  Indexed by AARCH64_COND_CODE.  */
+static const int aarch64_nzcv_codes[] =
+{
+  0,		/* EQ, Z == 1.  */
+  AARCH64_CC_Z,	/* NE, Z == 0.  */
+  0,		/* CS, C == 1.  */
+  AARCH64_CC_C,	/* CC, C == 0.  */
+  0,		/* MI, N == 1.  */
+  AARCH64_CC_N, /* PL, N == 0.  */
+  0,		/* VS, V == 1.  */
+  AARCH64_CC_V, /* VC, V == 0.  */
+  0,		/* HI, C ==1 && Z == 0.  */
+  AARCH64_CC_C,	/* LS, !(C == 1 && Z == 0).  */
+  AARCH64_CC_V,	/* GE, N == V.  */
+  0,		/* LT, N != V.  */
+  AARCH64_CC_Z, /* GT, Z == 0 && N == V.  */
+  0,		/* LE, !(Z == 0 && N == V).  */
+  0,		/* AL, Any.  */
+  0		/* NV, Any.  */
 };
 
-int
-aarch64_ccmp_mode_to_code (enum machine_mode mode)
-{
-  switch (mode)
-    {
-    case CC_DNEmode:
-      return NE;
-
-    case CC_DEQmode:
-      return EQ;
-
-    case CC_DLEmode:
-      return LE;
-
-    case CC_DGTmode:
-      return GT;
-
-    case CC_DLTmode:
-      return LT;
-
-    case CC_DGEmode:
-      return GE;
-
-    case CC_DLEUmode:
-      return LEU;
-
-    case CC_DGTUmode:
-      return GTU;
-
-    case CC_DLTUmode:
-      return LTU;
-
-    case CC_DGEUmode:
-      return GEU;
-
-    default:
-      gcc_unreachable ();
-    }
-}
-
-
 static void
 aarch64_print_operand (FILE *f, rtx x, int code)
 {
@@ -4546,36 +4447,17 @@ aarch64_print_operand (FILE *f, rtx x, int code)
       asm_fprintf (f, "%s", reg_names [REGNO (x) + 1]);
       break;
 
-    case 'm':
-      {
-        int cond_code;
-        /* Print a condition (eq, ne, etc).  */
-
-        /* CONST_TRUE_RTX means always -- that's the default.  */
-        if (x == const_true_rtx)
-	  return;
-
-        if (!COMPARISON_P (x))
-	  {
-	    output_operand_lossage ("invalid operand for '%%%c'", code);
-	    return;
-	  }
-
-        cond_code = aarch64_get_condition_code (x);
-        gcc_assert (cond_code >= 0);
-        fputs (aarch64_condition_codes[cond_code], f);
-      }
-      break;
-
     case 'M':
+    case 'm':
       {
         int cond_code;
-        /* Print the inverse of a condition (eq <-> ne, etc).  */
+	/* Print a condition (eq, ne, etc) or its inverse.  */
 
-        /* CONST_TRUE_RTX means never -- that's the default.  */
-        if (x == const_true_rtx)
+	/* CONST_TRUE_RTX means al/nv (al is the default, don't print it).  */
+	if (x == const_true_rtx)
 	  {
-	    fputs ("nv", f);
+	    if (code == 'M')
+	      fputs ("nv", f);
 	    return;
 	  }
 
@@ -4584,10 +4466,12 @@ aarch64_print_operand (FILE *f, rtx x, int code)
 	    output_operand_lossage ("invalid operand for '%%%c'", code);
 	    return;
 	  }
+
         cond_code = aarch64_get_condition_code (x);
         gcc_assert (cond_code >= 0);
-        fputs (aarch64_condition_codes[AARCH64_INVERSE_CONDITION_CODE
-                                       (cond_code)], f);
+	if (code == 'M')
+	  cond_code = AARCH64_INVERSE_CONDITION_CODE (cond_code);
+	fputs (aarch64_condition_codes[cond_code], f);
       }
       break;
 
@@ -4828,37 +4712,20 @@ aarch64_print_operand (FILE *f, rtx x, int code)
       output_addr_const (asm_out_file, x);
       break;
 
-    case 'K':
-      {
-	int cond_code;
-	/* Print nzcv.  */
-
-	if (!COMPARISON_P (x))
-	  {
-	    output_operand_lossage ("invalid operand for '%%%c'", code);
-	    return;
-	  }
-
-	cond_code = aarch64_get_condition_code_1 (CCmode, GET_CODE (x));
-	gcc_assert (cond_code >= 0);
-	asm_fprintf (f, "%d", aarch64_nzcv_codes[cond_code][0]);
-      }
-      break;
-
     case 'k':
       {
-	int cond_code;
+	HOST_WIDE_INT cond_code;
 	/* Print nzcv.  */
 
-	if (!COMPARISON_P (x))
+	if (!CONST_INT_P (x))
 	  {
 	    output_operand_lossage ("invalid operand for '%%%c'", code);
 	    return;
 	  }
 
-	cond_code = aarch64_get_condition_code_1 (CCmode, GET_CODE (x));
-	gcc_assert (cond_code >= 0);
-	asm_fprintf (f, "%d", aarch64_nzcv_codes[cond_code][1]);
+	cond_code = INTVAL (x);
+	gcc_assert (cond_code >= 0 && cond_code <= AARCH64_NV);
+	asm_fprintf (f, "%d", aarch64_nzcv_codes[cond_code]);
       }
       break;
 
@@ -13066,60 +12933,16 @@ aarch64_use_by_pieces_infrastructure_p (unsigned HOST_WIDE_INT size,
   return default_use_by_pieces_infrastructure_p (size, align, op, speed_p);
 }
 
-static enum machine_mode
-aarch64_code_to_ccmode (enum rtx_code code)
-{
-  switch (code)
-    {
-    case NE:
-      return CC_DNEmode;
-
-    case EQ:
-      return CC_DEQmode;
-
-    case LE:
-      return CC_DLEmode;
-
-    case LT:
-      return CC_DLTmode;
-
-    case GE:
-      return CC_DGEmode;
-
-    case GT:
-      return CC_DGTmode;
-
-    case LEU:
-      return CC_DLEUmode;
-
-    case LTU:
-      return CC_DLTUmode;
-
-    case GEU:
-      return CC_DGEUmode;
-
-    case GTU:
-      return CC_DGTUmode;
-
-    default:
-      return CCmode;
-    }
-}
-
 static rtx
 aarch64_gen_ccmp_first (rtx *prep_seq, rtx *gen_seq,
 			int code, tree treeop0, tree treeop1)
 {
-  enum machine_mode op_mode, cmp_mode, cc_mode;
-  rtx op0, op1, cmp, target;
+  machine_mode op_mode, cmp_mode, cc_mode = CCmode;
+  rtx op0, op1;
   int unsignedp = TYPE_UNSIGNED (TREE_TYPE (treeop0));
-  enum insn_code icode;
+  insn_code icode;
   struct expand_operand ops[4];
 
-  cc_mode = aarch64_code_to_ccmode ((enum rtx_code) code);
-  if (cc_mode == CCmode)
-    return NULL_RTX;
-
   start_sequence ();
   expand_operands (treeop0, treeop1, NULL_RTX, &op0, &op1, EXPAND_NORMAL);
 
@@ -13146,8 +12969,8 @@ aarch64_gen_ccmp_first (rtx *prep_seq, rtx *gen_seq,
       return NULL_RTX;
     }
 
-  op0 = prepare_operand (icode, op0, 2, op_mode, cmp_mode, unsignedp);
-  op1 = prepare_operand (icode, op1, 3, op_mode, cmp_mode, unsignedp);
+  op0 = prepare_operand (icode, op0, 0, op_mode, cmp_mode, unsignedp);
+  op1 = prepare_operand (icode, op1, 1, op_mode, cmp_mode, unsignedp);
   if (!op0 || !op1)
     {
       end_sequence ();
@@ -13156,16 +12979,11 @@ aarch64_gen_ccmp_first (rtx *prep_seq, rtx *gen_seq,
   *prep_seq = get_insns ();
   end_sequence ();
 
-  cmp = gen_rtx_fmt_ee ((enum rtx_code) code, cmp_mode, op0, op1);
-  target = gen_rtx_REG (CCmode, CC_REGNUM);
-
-  create_output_operand (&ops[0], target, CCmode);
-  create_fixed_operand (&ops[1], cmp);
-  create_fixed_operand (&ops[2], op0);
-  create_fixed_operand (&ops[3], op1);
+  create_fixed_operand (&ops[0], op0);
+  create_fixed_operand (&ops[1], op1);
 
   start_sequence ();
-  if (!maybe_expand_insn (icode, 4, ops))
+  if (!maybe_expand_insn (icode, 2, ops))
     {
       end_sequence ();
       return NULL_RTX;
@@ -13173,22 +12991,20 @@ aarch64_gen_ccmp_first (rtx *prep_seq, rtx *gen_seq,
   *gen_seq = get_insns ();
   end_sequence ();
 
-  return gen_rtx_REG (cc_mode, CC_REGNUM);
+  return gen_rtx_fmt_ee ((rtx_code) code, cc_mode,
+			 gen_rtx_REG (cc_mode, CC_REGNUM), const0_rtx);
 }
 
 static rtx
 aarch64_gen_ccmp_next (rtx *prep_seq, rtx *gen_seq, rtx prev, int cmp_code,
 		       tree treeop0, tree treeop1, int bit_code)
 {
-  rtx op0, op1, cmp0, cmp1, target;
-  enum machine_mode op_mode, cmp_mode, cc_mode;
+  rtx op0, op1, target;
+  machine_mode op_mode, cmp_mode, cc_mode = CCmode;
   int unsignedp = TYPE_UNSIGNED (TREE_TYPE (treeop0));
-  enum insn_code icode = CODE_FOR_ccmp_andsi;
+  insn_code icode;
   struct expand_operand ops[6];
-
-  cc_mode = aarch64_code_to_ccmode ((enum rtx_code) cmp_code);
-  if (cc_mode == CCmode)
-    return NULL_RTX;
+  int aarch64_cond;
 
   push_to_sequence ((rtx_insn*) *prep_seq);
   expand_operands (treeop0, treeop1, NULL_RTX, &op0, &op1, EXPAND_NORMAL);
@@ -13203,14 +13019,12 @@ aarch64_gen_ccmp_next (rtx *prep_seq, rtx *gen_seq, rtx prev, int cmp_code,
     case HImode:
     case SImode:
       cmp_mode = SImode;
-      icode = (enum rtx_code) bit_code == AND ? CODE_FOR_ccmp_andsi
-						: CODE_FOR_ccmp_iorsi;
+      icode = CODE_FOR_ccmpsi;
       break;
 
     case DImode:
       cmp_mode = DImode;
-      icode = (enum rtx_code) bit_code == AND ? CODE_FOR_ccmp_anddi
-						: CODE_FOR_ccmp_iordi;
+      icode = CODE_FOR_ccmpdi;
       break;
 
     default:
@@ -13229,15 +13043,22 @@ aarch64_gen_ccmp_next (rtx *prep_seq, rtx *gen_seq, rtx prev, int cmp_code,
   end_sequence ();
 
   target = gen_rtx_REG (cc_mode, CC_REGNUM);
-  cmp1 = gen_rtx_fmt_ee ((enum rtx_code) cmp_code, cmp_mode, op0, op1);
-  cmp0 = gen_rtx_fmt_ee (NE, cmp_mode, prev, const0_rtx);
+  aarch64_cond = aarch64_get_condition_code_1 (cc_mode, (rtx_code) cmp_code);
 
-  create_fixed_operand (&ops[0], prev);
+  if (bit_code != AND)
+    {
+      prev = gen_rtx_fmt_ee (REVERSE_CONDITION (GET_CODE (prev),
+						GET_MODE (XEXP (prev, 0))),
+			     VOIDmode, XEXP (prev, 0), const0_rtx);
+      aarch64_cond = AARCH64_INVERSE_CONDITION_CODE (aarch64_cond);
+    }
+
+  create_fixed_operand (&ops[0], XEXP (prev, 0));
   create_fixed_operand (&ops[1], target);
   create_fixed_operand (&ops[2], op0);
   create_fixed_operand (&ops[3], op1);
-  create_fixed_operand (&ops[4], cmp0);
-  create_fixed_operand (&ops[5], cmp1);
+  create_fixed_operand (&ops[4], prev);
+  create_fixed_operand (&ops[5], GEN_INT (aarch64_cond));
 
   push_to_sequence ((rtx_insn*) *gen_seq);
   if (!maybe_expand_insn (icode, 6, ops))
@@ -13249,7 +13070,7 @@ aarch64_gen_ccmp_next (rtx *prep_seq, rtx *gen_seq, rtx prev, int cmp_code,
   *gen_seq = get_insns ();
   end_sequence ();
 
-  return target;
+  return gen_rtx_fmt_ee ((rtx_code) cmp_code, VOIDmode, target, const0_rtx);
 }
 
 #undef TARGET_GEN_CCMP_FIRST
diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md
index bde231b..d8ae8e8 100644
--- a/gcc/config/aarch64/aarch64.md
+++ b/gcc/config/aarch64/aarch64.md
@@ -271,18 +271,17 @@
   ""
   "")
 
-(define_insn "ccmp_and<mode>"
-  [(set (match_operand 1 "ccmp_cc_register" "")
-	(compare
-	 (and:SI
+(define_insn "ccmp<mode>"
+  [(set (match_operand:CC 1 "cc_register" "")
+	(if_then_else:CC
 	  (match_operator 4 "aarch64_comparison_operator"
-	   [(match_operand 0 "ccmp_cc_register" "")
+	   [(match_operand 0 "cc_register" "")
 	    (const_int 0)])
-	  (match_operator 5 "aarch64_comparison_operator"
-	   [(match_operand:GPI 2 "register_operand" "r,r,r")
-	    (match_operand:GPI 3 "aarch64_ccmp_operand" "r,Uss,Usn")]))
-	 (const_int 0)))]
-  "aarch64_ccmp_mode_to_code (GET_MODE (operands[1])) == GET_CODE (operands[5])"
+	  (compare:CC
+	    (match_operand:GPI 2 "register_operand" "r,r,r")
+	    (match_operand:GPI 3 "aarch64_ccmp_operand" "r,Uss,Usn"))
+	  (match_operand 5 "immediate_operand")))]
+  ""
   "@
    ccmp\\t%<w>2, %<w>3, %k5, %m4
    ccmp\\t%<w>2, %<w>3, %k5, %m4
@@ -290,39 +289,6 @@
   [(set_attr "type" "alus_sreg,alus_imm,alus_imm")]
 )
 
-(define_insn "ccmp_ior<mode>"
-  [(set (match_operand 1 "ccmp_cc_register" "")
-	(compare
-	 (ior:SI
-	  (match_operator 4 "aarch64_comparison_operator"
-	   [(match_operand 0 "ccmp_cc_register" "")
-	    (const_int 0)])
-	  (match_operator 5 "aarch64_comparison_operator"
-	   [(match_operand:GPI 2 "register_operand" "r,r,r")
-	    (match_operand:GPI 3 "aarch64_ccmp_operand" "r,Uss,Usn")]))
-	 (const_int 0)))]
-  "aarch64_ccmp_mode_to_code (GET_MODE (operands[1])) == GET_CODE (operands[5])"
-  "@
-   ccmp\\t%<w>2, %<w>3, %K5, %M4
-   ccmp\\t%<w>2, %<w>3, %K5, %M4
-   ccmn\\t%<w>2, #%n3, %K5, %M4"
-  [(set_attr "type" "alus_sreg,alus_imm,alus_imm")]
-)
-
-(define_expand "cmp<mode>"
-  [(set (match_operand 0 "cc_register" "")
-        (match_operator:CC 1 "aarch64_comparison_operator"
-         [(match_operand:GPI 2 "register_operand" "")
-          (match_operand:GPI 3 "aarch64_plus_operand" "")]))]
-  ""
-  {
-    operands[1] = gen_rtx_fmt_ee (COMPARE,
-				  SELECT_CC_MODE (GET_CODE (operands[1]),
-						  operands[2], operands[3]),
-				  operands[2], operands[3]);
-  }
-)
-
 ;; Expansion of signed mod by a power of 2 using CSNEG.
 ;; For x0 % n where n is a power of 2 produce:
 ;; negs   x1, x0
@@ -2874,7 +2840,7 @@
 ;; Comparison insns
 ;; -------------------------------------------------------------------
 
-(define_insn "*cmp<mode>"
+(define_insn "cmp<mode>"
   [(set (reg:CC CC_REGNUM)
 	(compare:CC (match_operand:GPI 0 "register_operand" "r,r,r")
 		    (match_operand:GPI 1 "aarch64_plus_operand" "r,I,J")))]
@@ -2961,7 +2927,7 @@
 (define_expand "cstorecc4"
   [(set (match_operand:SI 0 "register_operand")
        (match_operator 1 "aarch64_comparison_operator"
-        [(match_operand 2 "ccmp_cc_register")
+	[(match_operand 2 "cc_register")
          (match_operand 3 "const0_operand")]))]
   ""
 "{
@@ -3164,19 +3130,15 @@
 			   (match_operand:ALLI 3 "register_operand" "")))]
   ""
   {
+    rtx ccreg;
     enum rtx_code code = GET_CODE (operands[1]);
 
     if (code == UNEQ || code == LTGT)
       FAIL;
 
-    if (!ccmp_cc_register (XEXP (operands[1], 0),
-			   GET_MODE (XEXP (operands[1], 0))))
-      {
-	rtx ccreg;
-	ccreg = aarch64_gen_compare_reg (code, XEXP (operands[1], 0),
-					 XEXP (operands[1], 1));
-	operands[1] = gen_rtx_fmt_ee (code, VOIDmode, ccreg, const0_rtx);
-      }
+    ccreg = aarch64_gen_compare_reg (code, XEXP (operands[1], 0),
+				     XEXP (operands[1], 1));
+    operands[1] = gen_rtx_fmt_ee (code, VOIDmode, ccreg, const0_rtx);
   }
 )
 
diff --git a/gcc/config/aarch64/predicates.md b/gcc/config/aarch64/predicates.md
index f3b514b..e96dc00 100644
--- a/gcc/config/aarch64/predicates.md
+++ b/gcc/config/aarch64/predicates.md
@@ -43,23 +43,6 @@
   (ior (match_operand 0 "register_operand")
        (match_operand 0 "aarch64_ccmp_immediate")))
 
-(define_special_predicate "ccmp_cc_register"
-  (and (match_code "reg")
-       (and (match_test "REGNO (op) == CC_REGNUM")
-	    (ior (match_test "mode == GET_MODE (op)")
-		 (match_test "mode == VOIDmode
-			      && (GET_MODE (op) == CC_DNEmode
-				  || GET_MODE (op) == CC_DEQmode
-				  || GET_MODE (op) == CC_DLEmode
-				  || GET_MODE (op) == CC_DLTmode
-				  || GET_MODE (op) == CC_DGEmode
-				  || GET_MODE (op) == CC_DGTmode
-				  || GET_MODE (op) == CC_DLEUmode
-				  || GET_MODE (op) == CC_DLTUmode
-				  || GET_MODE (op) == CC_DGEUmode
-				  || GET_MODE (op) == CC_DGTUmode)"))))
-)
-
 (define_predicate "aarch64_simd_register"
   (and (match_code "reg")
        (ior (match_test "REGNO_REG_CLASS (REGNO (op)) == FP_LO_REGS")