[20/77] Replace MODE_INT checks with is_int_mode

Replace checks of "GET_MODE_CLASS (...) == MODE_INT" with
"is_int_mode (..., &var)", in cases where it becomes useful
to refer to the mode as a scalar_int_mode.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* machmode.h (is_int_mode): New fuction.
	* combine.c (find_split_point): Use it.
	(combine_simplify_rtx): Likewise.
	(simplify_if_then_else): Likewise.
	(simplify_set): Likewise.
	(simplify_shift_const_1): Likewise.
	(simplify_comparison): Likewise.
	* config/aarch64/aarch64.c (aarch64_rtx_costs): Likewise.
	* cse.c (notreg_cost): Likewise.
	(cse_insn): Likewise.
	* cselib.c (cselib_lookup_1): Likewise.
	* dojump.c (do_jump_1): Likewise.
	(do_compare_rtx_and_jump): Likewise.
	* dse.c (get_call_args): Likewise.
	* dwarf2out.c (rtl_for_decl_init): Likewise.
	(native_encode_initializer): Likewise.
	* expmed.c (emit_store_flag_1): Likewise.
	(emit_store_flag): Likewise.
	* expr.c (convert_modes): Likewise.
	(store_field): Likewise.
	(expand_expr_real_1): Likewise.
	* fold-const.c (fold_read_from_constant_string): Likewise.
	* gimple-ssa-sprintf.c (get_format_string): Likewise.
	* optabs-libfuncs.c (gen_int_libfunc): Likewise.
	* optabs.c (expand_binop): Likewise.
	(expand_unop): Likewise.
	(expand_abs_nojump): Likewise.
	(expand_one_cmpl_abs_nojump): Likewise.
	* simplify-rtx.c (mode_signbit_p): Likewise.
	(val_signbit_p): Likewise.
	(val_signbit_known_set_p): Likewise.
	(val_signbit_known_clear_p): Likewise.
	(simplify_relational_operation_1): Likewise.
	* tree.c (vector_type_mode): Likewise.

gcc/go/
	* go-lang.c (go_langhook_type_for_mode): Use is_int_mode.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r251472

19 files changed, 400 insertions, 297 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 15ec88d..654ea7e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -2,6 +2,45 @@
 	    Alan Hayward  <alan.hayward@arm.com>
 	    David Sherwood  <david.sherwood@arm.com>
 
+	* machmode.h (is_int_mode): New fuction.
+	* combine.c (find_split_point): Use it.
+	(combine_simplify_rtx): Likewise.
+	(simplify_if_then_else): Likewise.
+	(simplify_set): Likewise.
+	(simplify_shift_const_1): Likewise.
+	(simplify_comparison): Likewise.
+	* config/aarch64/aarch64.c (aarch64_rtx_costs): Likewise.
+	* cse.c (notreg_cost): Likewise.
+	(cse_insn): Likewise.
+	* cselib.c (cselib_lookup_1): Likewise.
+	* dojump.c (do_jump_1): Likewise.
+	(do_compare_rtx_and_jump): Likewise.
+	* dse.c (get_call_args): Likewise.
+	* dwarf2out.c (rtl_for_decl_init): Likewise.
+	(native_encode_initializer): Likewise.
+	* expmed.c (emit_store_flag_1): Likewise.
+	(emit_store_flag): Likewise.
+	* expr.c (convert_modes): Likewise.
+	(store_field): Likewise.
+	(expand_expr_real_1): Likewise.
+	* fold-const.c (fold_read_from_constant_string): Likewise.
+	* gimple-ssa-sprintf.c (get_format_string): Likewise.
+	* optabs-libfuncs.c (gen_int_libfunc): Likewise.
+	* optabs.c (expand_binop): Likewise.
+	(expand_unop): Likewise.
+	(expand_abs_nojump): Likewise.
+	(expand_one_cmpl_abs_nojump): Likewise.
+	* simplify-rtx.c (mode_signbit_p): Likewise.
+	(val_signbit_p): Likewise.
+	(val_signbit_known_set_p): Likewise.
+	(val_signbit_known_clear_p): Likewise.
+	(simplify_relational_operation_1): Likewise.
+	* tree.c (vector_type_mode): Likewise.
+
+2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
+	    Alan Hayward  <alan.hayward@arm.com>
+	    David Sherwood  <david.sherwood@arm.com>
+
 	* machmode.h (smallest_mode_for_size): Fix formatting.
 	(smallest_int_mode_for_size): New function.
 	* cfgexpand.c (expand_debug_expr): Use smallest_int_mode_for_size
diff --git a/gcc/combine.c b/gcc/combine.c
index 44e378a..39c26fe 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -4791,6 +4791,7 @@ find_split_point (rtx *loc, rtx_insn *insn, bool set_src)
   HOST_WIDE_INT pos = 0;
   int unsignedp = 0;
   rtx inner = NULL_RTX;
+  scalar_int_mode inner_mode;
 
   /* First special-case some codes.  */
   switch (code)
@@ -5032,12 +5033,12 @@ find_split_point (rtx *loc, rtx_insn *insn, bool set_src)
 	  /* We can't optimize if either mode is a partial integer
 	     mode as we don't know how many bits are significant
 	     in those modes.  */
-	  if (GET_MODE_CLASS (GET_MODE (inner)) == MODE_PARTIAL_INT
+	  if (!is_int_mode (GET_MODE (inner), &inner_mode)
 	      || GET_MODE_CLASS (GET_MODE (SET_SRC (x))) == MODE_PARTIAL_INT)
 	    break;
 
 	  pos = 0;
-	  len = GET_MODE_PRECISION (GET_MODE (inner));
+	  len = GET_MODE_PRECISION (inner_mode);
 	  unsignedp = 0;
 	  break;
 
@@ -5560,6 +5561,7 @@ combine_simplify_rtx (rtx x, machine_mode op0_mode, int in_dest,
 {
   enum rtx_code code = GET_CODE (x);
   machine_mode mode = GET_MODE (x);
+  scalar_int_mode int_mode;
   rtx temp;
   int i;
 
@@ -6070,47 +6072,51 @@ combine_simplify_rtx (rtx x, machine_mode op0_mode, int in_dest,
 	    ;
 
 	  else if (STORE_FLAG_VALUE == 1
-	      && new_code == NE && GET_MODE_CLASS (mode) == MODE_INT
-	      && op1 == const0_rtx
-	      && mode == GET_MODE (op0)
-	      && nonzero_bits (op0, mode) == 1)
-	    return gen_lowpart (mode,
+		   && new_code == NE
+		   && is_int_mode (mode, &int_mode)
+		   && op1 == const0_rtx
+		   && int_mode == GET_MODE (op0)
+		   && nonzero_bits (op0, int_mode) == 1)
+	    return gen_lowpart (int_mode,
 				expand_compound_operation (op0));
 
 	  else if (STORE_FLAG_VALUE == 1
-		   && new_code == NE && GET_MODE_CLASS (mode) == MODE_INT
+		   && new_code == NE
+		   && is_int_mode (mode, &int_mode)
 		   && op1 == const0_rtx
-		   && mode == GET_MODE (op0)
-		   && (num_sign_bit_copies (op0, mode)
-		       == GET_MODE_PRECISION (mode)))
+		   && int_mode == GET_MODE (op0)
+		   && (num_sign_bit_copies (op0, int_mode)
+		       == GET_MODE_PRECISION (int_mode)))
 	    {
 	      op0 = expand_compound_operation (op0);
-	      return simplify_gen_unary (NEG, mode,
-					 gen_lowpart (mode, op0),
-					 mode);
+	      return simplify_gen_unary (NEG, int_mode,
+					 gen_lowpart (int_mode, op0),
+					 int_mode);
 	    }
 
 	  else if (STORE_FLAG_VALUE == 1
-		   && new_code == EQ && GET_MODE_CLASS (mode) == MODE_INT
+		   && new_code == EQ
+		   && is_int_mode (mode, &int_mode)
 		   && op1 == const0_rtx
-		   && mode == GET_MODE (op0)
-		   && nonzero_bits (op0, mode) == 1)
+		   && int_mode == GET_MODE (op0)
+		   && nonzero_bits (op0, int_mode) == 1)
 	    {
 	      op0 = expand_compound_operation (op0);
-	      return simplify_gen_binary (XOR, mode,
-					  gen_lowpart (mode, op0),
+	      return simplify_gen_binary (XOR, int_mode,
+					  gen_lowpart (int_mode, op0),
 					  const1_rtx);
 	    }
 
 	  else if (STORE_FLAG_VALUE == 1
-		   && new_code == EQ && GET_MODE_CLASS (mode) == MODE_INT
+		   && new_code == EQ
+		   && is_int_mode (mode, &int_mode)
 		   && op1 == const0_rtx
-		   && mode == GET_MODE (op0)
-		   && (num_sign_bit_copies (op0, mode)
-		       == GET_MODE_PRECISION (mode)))
+		   && int_mode == GET_MODE (op0)
+		   && (num_sign_bit_copies (op0, int_mode)
+		       == GET_MODE_PRECISION (int_mode)))
 	    {
 	      op0 = expand_compound_operation (op0);
-	      return plus_constant (mode, gen_lowpart (mode, op0), 1);
+	      return plus_constant (int_mode, gen_lowpart (int_mode, op0), 1);
 	    }
 
 	  /* If STORE_FLAG_VALUE is -1, we have cases similar to
@@ -6119,48 +6125,51 @@ combine_simplify_rtx (rtx x, machine_mode op0_mode, int in_dest,
 	    ;
 
 	  else if (STORE_FLAG_VALUE == -1
-		   && new_code == NE && GET_MODE_CLASS (mode) == MODE_INT
+		   && new_code == NE
+		   && is_int_mode (mode, &int_mode)
 		   && op1 == const0_rtx
-		   && mode == GET_MODE (op0)
-		   && (num_sign_bit_copies (op0, mode)
-		       == GET_MODE_PRECISION (mode)))
-	    return gen_lowpart (mode,
-				expand_compound_operation (op0));
+		   && int_mode == GET_MODE (op0)
+		   && (num_sign_bit_copies (op0, int_mode)
+		       == GET_MODE_PRECISION (int_mode)))
+	    return gen_lowpart (int_mode, expand_compound_operation (op0));
 
 	  else if (STORE_FLAG_VALUE == -1
-		   && new_code == NE && GET_MODE_CLASS (mode) == MODE_INT
+		   && new_code == NE
+		   && is_int_mode (mode, &int_mode)
 		   && op1 == const0_rtx
-		   && mode == GET_MODE (op0)
-		   && nonzero_bits (op0, mode) == 1)
+		   && int_mode == GET_MODE (op0)
+		   && nonzero_bits (op0, int_mode) == 1)
 	    {
 	      op0 = expand_compound_operation (op0);
-	      return simplify_gen_unary (NEG, mode,
-					 gen_lowpart (mode, op0),
-					 mode);
+	      return simplify_gen_unary (NEG, int_mode,
+					 gen_lowpart (int_mode, op0),
+					 int_mode);
 	    }
 
 	  else if (STORE_FLAG_VALUE == -1
-		   && new_code == EQ && GET_MODE_CLASS (mode) == MODE_INT
+		   && new_code == EQ
+		   && is_int_mode (mode, &int_mode)
 		   && op1 == const0_rtx
-		   && mode == GET_MODE (op0)
-		   && (num_sign_bit_copies (op0, mode)
-		       == GET_MODE_PRECISION (mode)))
+		   && int_mode == GET_MODE (op0)
+		   && (num_sign_bit_copies (op0, int_mode)
+		       == GET_MODE_PRECISION (int_mode)))
 	    {
 	      op0 = expand_compound_operation (op0);
-	      return simplify_gen_unary (NOT, mode,
-					 gen_lowpart (mode, op0),
-					 mode);
+	      return simplify_gen_unary (NOT, int_mode,
+					 gen_lowpart (int_mode, op0),
+					 int_mode);
 	    }
 
 	  /* If X is 0/1, (eq X 0) is X-1.  */
 	  else if (STORE_FLAG_VALUE == -1
-		   && new_code == EQ && GET_MODE_CLASS (mode) == MODE_INT
+		   && new_code == EQ
+		   && is_int_mode (mode, &int_mode)
 		   && op1 == const0_rtx
-		   && mode == GET_MODE (op0)
-		   && nonzero_bits (op0, mode) == 1)
+		   && int_mode == GET_MODE (op0)
+		   && nonzero_bits (op0, int_mode) == 1)
 	    {
 	      op0 = expand_compound_operation (op0);
-	      return plus_constant (mode, gen_lowpart (mode, op0), -1);
+	      return plus_constant (int_mode, gen_lowpart (int_mode, op0), -1);
 	    }
 
 	  /* If STORE_FLAG_VALUE says to just test the sign bit and X has just
@@ -6168,16 +6177,17 @@ combine_simplify_rtx (rtx x, machine_mode op0_mode, int in_dest,
 	     (ashift x c) where C puts the bit in the sign bit.  Remove any
 	     AND with STORE_FLAG_VALUE when we are done, since we are only
 	     going to test the sign bit.  */
-	  if (new_code == NE && GET_MODE_CLASS (mode) == MODE_INT
-	      && HWI_COMPUTABLE_MODE_P (mode)
-	      && val_signbit_p (mode, STORE_FLAG_VALUE)
+	  if (new_code == NE
+	      && is_int_mode (mode, &int_mode)
+	      && HWI_COMPUTABLE_MODE_P (int_mode)
+	      && val_signbit_p (int_mode, STORE_FLAG_VALUE)
 	      && op1 == const0_rtx
-	      && mode == GET_MODE (op0)
-	      && (i = exact_log2 (nonzero_bits (op0, mode))) >= 0)
+	      && int_mode == GET_MODE (op0)
+	      && (i = exact_log2 (nonzero_bits (op0, int_mode))) >= 0)
 	    {
-	      x = simplify_shift_const (NULL_RTX, ASHIFT, mode,
+	      x = simplify_shift_const (NULL_RTX, ASHIFT, int_mode,
 					expand_compound_operation (op0),
-					GET_MODE_PRECISION (mode) - 1 - i);
+					GET_MODE_PRECISION (int_mode) - 1 - i);
 	      if (GET_CODE (x) == AND && XEXP (x, 1) == const_true_rtx)
 		return XEXP (x, 0);
 	      else
@@ -6263,6 +6273,7 @@ simplify_if_then_else (rtx x)
   int i;
   enum rtx_code false_code;
   rtx reversed;
+  scalar_int_mode int_mode;
 
   /* Simplify storing of the truth value.  */
   if (comparison_p && true_rtx == const_true_rtx && false_rtx == const0_rtx)
@@ -6443,7 +6454,7 @@ simplify_if_then_else (rtx x)
 
   if ((STORE_FLAG_VALUE == 1 || STORE_FLAG_VALUE == -1)
       && comparison_p
-      && GET_MODE_CLASS (mode) == MODE_INT
+      && is_int_mode (mode, &int_mode)
       && ! side_effects_p (x))
     {
       rtx t = make_compound_operation (true_rtx, SET);
@@ -6451,7 +6462,7 @@ simplify_if_then_else (rtx x)
       rtx cond_op0 = XEXP (cond, 0);
       rtx cond_op1 = XEXP (cond, 1);
       enum rtx_code op = UNKNOWN, extend_op = UNKNOWN;
-      machine_mode m = mode;
+      machine_mode m = int_mode;
       rtx z = 0, c1 = NULL_RTX;
 
       if ((GET_CODE (t) == PLUS || GET_CODE (t) == MINUS
@@ -6480,7 +6491,7 @@ simplify_if_then_else (rtx x)
 	       && rtx_equal_p (SUBREG_REG (XEXP (XEXP (t, 0), 0)), f)
 	       && (num_sign_bit_copies (f, GET_MODE (f))
 		   > (unsigned int)
-		     (GET_MODE_PRECISION (mode)
+		     (GET_MODE_PRECISION (int_mode)
 		      - GET_MODE_PRECISION (GET_MODE (XEXP (XEXP (t, 0), 0))))))
 	{
 	  c1 = XEXP (XEXP (t, 0), 1); z = f; op = GET_CODE (XEXP (t, 0));
@@ -6496,7 +6507,7 @@ simplify_if_then_else (rtx x)
 	       && rtx_equal_p (SUBREG_REG (XEXP (XEXP (t, 0), 1)), f)
 	       && (num_sign_bit_copies (f, GET_MODE (f))
 		   > (unsigned int)
-		     (GET_MODE_PRECISION (mode)
+		     (GET_MODE_PRECISION (int_mode)
 		      - GET_MODE_PRECISION (GET_MODE (XEXP (XEXP (t, 0), 1))))))
 	{
 	  c1 = XEXP (XEXP (t, 0), 0); z = f; op = GET_CODE (XEXP (t, 0));
@@ -6512,7 +6523,7 @@ simplify_if_then_else (rtx x)
 		   || GET_CODE (XEXP (t, 0)) == LSHIFTRT
 		   || GET_CODE (XEXP (t, 0)) == ASHIFTRT)
 	       && GET_CODE (XEXP (XEXP (t, 0), 0)) == SUBREG
-	       && HWI_COMPUTABLE_MODE_P (mode)
+	       && HWI_COMPUTABLE_MODE_P (int_mode)
 	       && subreg_lowpart_p (XEXP (XEXP (t, 0), 0))
 	       && rtx_equal_p (SUBREG_REG (XEXP (XEXP (t, 0), 0)), f)
 	       && ((nonzero_bits (f, GET_MODE (f))
@@ -6528,7 +6539,7 @@ simplify_if_then_else (rtx x)
 		   || GET_CODE (XEXP (t, 0)) == IOR
 		   || GET_CODE (XEXP (t, 0)) == XOR)
 	       && GET_CODE (XEXP (XEXP (t, 0), 1)) == SUBREG
-	       && HWI_COMPUTABLE_MODE_P (mode)
+	       && HWI_COMPUTABLE_MODE_P (int_mode)
 	       && subreg_lowpart_p (XEXP (XEXP (t, 0), 1))
 	       && rtx_equal_p (SUBREG_REG (XEXP (XEXP (t, 0), 1)), f)
 	       && ((nonzero_bits (f, GET_MODE (f))
@@ -6552,7 +6563,7 @@ simplify_if_then_else (rtx x)
 	  temp = simplify_gen_binary (op, m, gen_lowpart (m, z), temp);
 
 	  if (extend_op != UNKNOWN)
-	    temp = simplify_gen_unary (extend_op, mode, temp, m);
+	    temp = simplify_gen_unary (extend_op, int_mode, temp, m);
 
 	  return temp;
 	}
@@ -6605,6 +6616,7 @@ simplify_set (rtx x)
     = GET_MODE (src) != VOIDmode ? GET_MODE (src) : GET_MODE (dest);
   rtx_insn *other_insn;
   rtx *cc_use;
+  scalar_int_mode int_mode;
 
   /* (set (pc) (return)) gets written as (return).  */
   if (GET_CODE (dest) == PC && ANY_RETURN_P (src))
@@ -6871,15 +6883,14 @@ simplify_set (rtx x)
 
   if (GET_CODE (dest) != PC
       && GET_CODE (src) == IF_THEN_ELSE
-      && GET_MODE_CLASS (GET_MODE (src)) == MODE_INT
+      && is_int_mode (GET_MODE (src), &int_mode)
       && (GET_CODE (XEXP (src, 0)) == EQ || GET_CODE (XEXP (src, 0)) == NE)
       && XEXP (XEXP (src, 0), 1) == const0_rtx
-      && GET_MODE (src) == GET_MODE (XEXP (XEXP (src, 0), 0))
+      && int_mode == GET_MODE (XEXP (XEXP (src, 0), 0))
       && (!HAVE_conditional_move
-	  || ! can_conditionally_move_p (GET_MODE (src)))
-      && (num_sign_bit_copies (XEXP (XEXP (src, 0), 0),
-			       GET_MODE (XEXP (XEXP (src, 0), 0)))
-	  == GET_MODE_PRECISION (GET_MODE (XEXP (XEXP (src, 0), 0))))
+	  || ! can_conditionally_move_p (int_mode))
+      && (num_sign_bit_copies (XEXP (XEXP (src, 0), 0), int_mode)
+	  == GET_MODE_PRECISION (int_mode))
       && ! side_effects_p (src))
     {
       rtx true_rtx = (GET_CODE (XEXP (src, 0)) == NE
@@ -6901,17 +6912,17 @@ simplify_set (rtx x)
 	       && rtx_equal_p (XEXP (false_rtx, 1), true_rtx))
 	term1 = true_rtx, false_rtx = XEXP (false_rtx, 0), true_rtx = const0_rtx;
 
-      term2 = simplify_gen_binary (AND, GET_MODE (src),
+      term2 = simplify_gen_binary (AND, int_mode,
 				   XEXP (XEXP (src, 0), 0), true_rtx);
-      term3 = simplify_gen_binary (AND, GET_MODE (src),
-				   simplify_gen_unary (NOT, GET_MODE (src),
+      term3 = simplify_gen_binary (AND, int_mode,
+				   simplify_gen_unary (NOT, int_mode,
 						       XEXP (XEXP (src, 0), 0),
-						       GET_MODE (src)),
+						       int_mode),
 				   false_rtx);
 
       SUBST (SET_SRC (x),
-	     simplify_gen_binary (IOR, GET_MODE (src),
-				  simplify_gen_binary (IOR, GET_MODE (src),
+	     simplify_gen_binary (IOR, int_mode,
+				  simplify_gen_binary (IOR, int_mode,
 						       term1, term2),
 				  term3));
 
@@ -10296,7 +10307,8 @@ simplify_shift_const_1 (enum rtx_code code, machine_mode result_mode,
   rtx orig_varop = varop;
   int count;
   machine_mode mode = result_mode;
-  machine_mode shift_mode, tmode;
+  machine_mode shift_mode;
+  scalar_int_mode tmode, inner_mode;
   unsigned int mode_words
     = (GET_MODE_SIZE (mode) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD;
   /* We form (outer_op (code varop count) (outer_const)).  */
@@ -10464,17 +10476,16 @@ simplify_shift_const_1 (enum rtx_code code, machine_mode result_mode,
 	     the same number of words as what we've seen so far.  Then store
 	     the widest mode in MODE.  */
 	  if (subreg_lowpart_p (varop)
-	      && (GET_MODE_SIZE (GET_MODE (SUBREG_REG (varop)))
-		  > GET_MODE_SIZE (GET_MODE (varop)))
-	      && (unsigned int) ((GET_MODE_SIZE (GET_MODE (SUBREG_REG (varop)))
+	      && is_int_mode (GET_MODE (SUBREG_REG (varop)), &inner_mode)
+	      && GET_MODE_SIZE (inner_mode) > GET_MODE_SIZE (GET_MODE (varop))
+	      && (unsigned int) ((GET_MODE_SIZE (inner_mode)
 				  + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)
 		 == mode_words
-	      && GET_MODE_CLASS (GET_MODE (varop)) == MODE_INT
-	      && GET_MODE_CLASS (GET_MODE (SUBREG_REG (varop))) == MODE_INT)
+	      && GET_MODE_CLASS (GET_MODE (varop)) == MODE_INT)
 	    {
 	      varop = SUBREG_REG (varop);
-	      if (GET_MODE_SIZE (GET_MODE (varop)) > GET_MODE_SIZE (mode))
-		mode = GET_MODE (varop);
+	      if (GET_MODE_SIZE (inner_mode) > GET_MODE_SIZE (mode))
+		mode = inner_mode;
 	      continue;
 	    }
 	  break;
@@ -11717,7 +11728,8 @@ simplify_comparison (enum rtx_code code, rtx *pop0, rtx *pop1)
   rtx op1 = *pop1;
   rtx tem, tem1;
   int i;
-  machine_mode mode, tmode;
+  scalar_int_mode mode, inner_mode;
+  machine_mode tmode;
 
   /* Try a few ways of applying the same transformation to both operands.  */
   while (1)
@@ -12128,19 +12140,17 @@ simplify_comparison (enum rtx_code code, rtx *pop0, rtx *pop1)
 	    ;
 	  else if (subreg_lowpart_p (op0)
 		   && GET_MODE_CLASS (GET_MODE (op0)) == MODE_INT
-		   && GET_MODE_CLASS (GET_MODE (SUBREG_REG (op0))) == MODE_INT
+		   && is_int_mode (GET_MODE (SUBREG_REG (op0)), &inner_mode)
 		   && (code == NE || code == EQ)
-		   && (GET_MODE_PRECISION (GET_MODE (SUBREG_REG (op0)))
-		       <= HOST_BITS_PER_WIDE_INT)
+		   && GET_MODE_PRECISION (inner_mode) <= HOST_BITS_PER_WIDE_INT
 		   && !paradoxical_subreg_p (op0)
-		   && (nonzero_bits (SUBREG_REG (op0),
-				     GET_MODE (SUBREG_REG (op0)))
+		   && (nonzero_bits (SUBREG_REG (op0), inner_mode)
 		       & ~GET_MODE_MASK (GET_MODE (op0))) == 0)
 	    {
 	      /* Remove outer subregs that don't do anything.  */
-	      tem = gen_lowpart (GET_MODE (SUBREG_REG (op0)), op1);
+	      tem = gen_lowpart (inner_mode, op1);
 
-	      if ((nonzero_bits (tem, GET_MODE (SUBREG_REG (op0)))
+	      if ((nonzero_bits (tem, inner_mode)
 		   & ~GET_MODE_MASK (GET_MODE (op0))) == 0)
 		{
 		  op0 = SUBREG_REG (op0);
@@ -12658,8 +12668,8 @@ simplify_comparison (enum rtx_code code, rtx *pop0, rtx *pop1)
   op1 = make_compound_operation (op1, SET);
 
   if (GET_CODE (op0) == SUBREG && subreg_lowpart_p (op0)
-      && GET_MODE_CLASS (GET_MODE (op0)) == MODE_INT
-      && GET_MODE_CLASS (GET_MODE (SUBREG_REG (op0))) == MODE_INT
+      && is_int_mode (GET_MODE (op0), &mode)
+      && is_int_mode (GET_MODE (SUBREG_REG (op0)), &inner_mode)
       && (code == NE || code == EQ))
     {
       if (paradoxical_subreg_p (op0))
@@ -12669,19 +12679,16 @@ simplify_comparison (enum rtx_code code, rtx *pop0, rtx *pop1)
 	  if (REG_P (SUBREG_REG (op0)))
 	    {
 	      op0 = SUBREG_REG (op0);
-	      op1 = gen_lowpart (GET_MODE (op0), op1);
+	      op1 = gen_lowpart (inner_mode, op1);
 	    }
 	}
-      else if ((GET_MODE_PRECISION (GET_MODE (SUBREG_REG (op0)))
-		<= HOST_BITS_PER_WIDE_INT)
-	       && (nonzero_bits (SUBREG_REG (op0),
-				 GET_MODE (SUBREG_REG (op0)))
-		   & ~GET_MODE_MASK (GET_MODE (op0))) == 0)
+      else if (GET_MODE_PRECISION (inner_mode) <= HOST_BITS_PER_WIDE_INT
+	       && (nonzero_bits (SUBREG_REG (op0), inner_mode)
+		   & ~GET_MODE_MASK (mode)) == 0)
 	{
-	  tem = gen_lowpart (GET_MODE (SUBREG_REG (op0)), op1);
+	  tem = gen_lowpart (inner_mode, op1);
 
-	  if ((nonzero_bits (tem, GET_MODE (SUBREG_REG (op0)))
-	       & ~GET_MODE_MASK (GET_MODE (op0))) == 0)
+	  if ((nonzero_bits (tem, inner_mode) & ~GET_MODE_MASK (mode)) == 0)
 	    op0 = SUBREG_REG (op0), op1 = tem;
 	}
     }
@@ -12692,8 +12699,7 @@ simplify_comparison (enum rtx_code code, rtx *pop0, rtx *pop1)
      mode for which we can do the compare.  There are a number of cases in
      which we can use the wider mode.  */
 
-  mode = GET_MODE (op0);
-  if (mode != VOIDmode && GET_MODE_CLASS (mode) == MODE_INT
+  if (is_int_mode (GET_MODE (op0), &mode)
       && GET_MODE_SIZE (mode) < UNITS_PER_WORD
       && ! have_insn_for (COMPARE, mode))
     FOR_EACH_WIDER_MODE (tmode, mode)
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 54c30a2..7ca12db 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -6844,6 +6844,7 @@ aarch64_rtx_costs (rtx x, machine_mode mode, int outer ATTRIBUTE_UNUSED,
   const struct cpu_cost_table *extra_cost
     = aarch64_tune_params.insn_extra_cost;
   int code = GET_CODE (x);
+  scalar_int_mode int_mode;
 
   /* By default, assume that everything has equivalent cost to the
      cheapest instruction.  Any additional costs are applied as a delta
@@ -7426,28 +7427,29 @@ cost_plus:
           return true;
         }
 
-      if (GET_MODE_CLASS (mode) == MODE_INT)
+      if (is_int_mode (mode, &int_mode))
 	{
 	  if (CONST_INT_P (op1))
 	    {
 	      /* We have a mask + shift version of a UBFIZ
 		 i.e. the *andim_ashift<mode>_bfiz pattern.  */
 	      if (GET_CODE (op0) == ASHIFT
-		  && aarch64_mask_and_shift_for_ubfiz_p (mode, op1,
-							  XEXP (op0, 1)))
+		  && aarch64_mask_and_shift_for_ubfiz_p (int_mode, op1,
+							 XEXP (op0, 1)))
 		{
-		  *cost += rtx_cost (XEXP (op0, 0), mode,
+		  *cost += rtx_cost (XEXP (op0, 0), int_mode,
 				     (enum rtx_code) code, 0, speed);
 		  if (speed)
 		    *cost += extra_cost->alu.bfx;
 
 		  return true;
 		}
-	      else if (aarch64_bitmask_imm (INTVAL (op1), mode))
+	      else if (aarch64_bitmask_imm (INTVAL (op1), int_mode))
 		{
 		/* We possibly get the immediate for free, this is not
 		   modelled.  */
-		  *cost += rtx_cost (op0, mode, (enum rtx_code) code, 0, speed);
+		  *cost += rtx_cost (op0, int_mode,
+				     (enum rtx_code) code, 0, speed);
 		  if (speed)
 		    *cost += extra_cost->alu.logical;
 
@@ -7482,8 +7484,10 @@ cost_plus:
 		}
 
 	      /* In both cases we want to cost both operands.  */
-	      *cost += rtx_cost (new_op0, mode, (enum rtx_code) code, 0, speed);
-	      *cost += rtx_cost (op1, mode, (enum rtx_code) code, 1, speed);
+	      *cost += rtx_cost (new_op0, int_mode, (enum rtx_code) code,
+				 0, speed);
+	      *cost += rtx_cost (op1, int_mode, (enum rtx_code) code,
+				 1, speed);
 
 	      return true;
 	    }
diff --git a/gcc/cse.c b/gcc/cse.c
index 58572e6..8ef9063 100644
--- a/gcc/cse.c
+++ b/gcc/cse.c
@@ -720,13 +720,14 @@ preferable (int cost_a, int regcost_a, int cost_b, int regcost_b)
 static int
 notreg_cost (rtx x, machine_mode mode, enum rtx_code outer, int opno)
 {
+  scalar_int_mode int_mode, inner_mode;
   return ((GET_CODE (x) == SUBREG
 	   && REG_P (SUBREG_REG (x))
-	   && GET_MODE_CLASS (mode) == MODE_INT
-	   && GET_MODE_CLASS (GET_MODE (SUBREG_REG (x))) == MODE_INT
-	   && GET_MODE_SIZE (mode) < GET_MODE_SIZE (GET_MODE (SUBREG_REG (x)))
+	   && is_int_mode (mode, &int_mode)
+	   && is_int_mode (GET_MODE (SUBREG_REG (x)), &inner_mode)
+	   && GET_MODE_SIZE (int_mode) < GET_MODE_SIZE (inner_mode)
 	   && subreg_lowpart_p (x)
-	   && TRULY_NOOP_TRUNCATION_MODES_P (mode, GET_MODE (SUBREG_REG (x))))
+	   && TRULY_NOOP_TRUNCATION_MODES_P (int_mode, inner_mode))
 	  ? 0
 	  : rtx_cost (x, mode, outer, opno, optimize_this_for_speed_p) * 2);
 }
@@ -4603,6 +4604,7 @@ cse_insn (rtx_insn *insn)
       /* Set nonzero if we need to call force_const_mem on with the
 	 contents of src_folded before using it.  */
       int src_folded_force_flag = 0;
+      scalar_int_mode int_mode;
 
       dest = SET_DEST (sets[i].rtl);
       src = SET_SRC (sets[i].rtl);
@@ -4840,13 +4842,13 @@ cse_insn (rtx_insn *insn)
 	 wider mode.  */
 
       if (src_const && src_related == 0 && CONST_INT_P (src_const)
-	  && GET_MODE_CLASS (mode) == MODE_INT
-	  && GET_MODE_PRECISION (mode) < BITS_PER_WORD)
+	  && is_int_mode (mode, &int_mode)
+	  && GET_MODE_PRECISION (int_mode) < BITS_PER_WORD)
 	{
-	  machine_mode wider_mode;
-
-	  FOR_EACH_WIDER_MODE (wider_mode, mode)
+	  opt_scalar_int_mode wider_mode_iter;
+	  FOR_EACH_WIDER_MODE (wider_mode_iter, int_mode)
 	    {
+	      scalar_int_mode wider_mode = wider_mode_iter.require ();
 	      if (GET_MODE_PRECISION (wider_mode) > BITS_PER_WORD)
 		break;
 
@@ -4860,7 +4862,7 @@ cse_insn (rtx_insn *insn)
 		   const_elt; const_elt = const_elt->next_same_value)
 		if (REG_P (const_elt->exp))
 		  {
-		    src_related = gen_lowpart (mode, const_elt->exp);
+		    src_related = gen_lowpart (int_mode, const_elt->exp);
 		    break;
 		  }
 
diff --git a/gcc/cselib.c b/gcc/cselib.c
index 74c25ac..41e0e4f 100644
--- a/gcc/cselib.c
+++ b/gcc/cselib.c
@@ -2009,6 +2009,8 @@ cselib_lookup_1 (rtx x, machine_mode mode,
 
       e = new_cselib_val (next_uid, GET_MODE (x), x);
       new_elt_loc_list (e, x);
+
+      scalar_int_mode int_mode;
       if (REG_VALUES (i) == 0)
 	{
 	  /* Maintain the invariant that the first entry of
@@ -2018,27 +2020,27 @@ cselib_lookup_1 (rtx x, machine_mode mode,
 	  REG_VALUES (i) = new_elt_list (REG_VALUES (i), NULL);
 	}
       else if (cselib_preserve_constants
-	       && GET_MODE_CLASS (mode) == MODE_INT)
+	       && is_int_mode (mode, &int_mode))
 	{
 	  /* During var-tracking, try harder to find equivalences
 	     for SUBREGs.  If a setter sets say a DImode register
 	     and user uses that register only in SImode, add a lowpart
 	     subreg location.  */
 	  struct elt_list *lwider = NULL;
+	  scalar_int_mode lmode;
 	  l = REG_VALUES (i);
 	  if (l && l->elt == NULL)
 	    l = l->next;
 	  for (; l; l = l->next)
-	    if (GET_MODE_CLASS (GET_MODE (l->elt->val_rtx)) == MODE_INT
-		&& GET_MODE_SIZE (GET_MODE (l->elt->val_rtx))
-		   > GET_MODE_SIZE (mode)
+	    if (is_int_mode (GET_MODE (l->elt->val_rtx), &lmode)
+		&& GET_MODE_SIZE (lmode) > GET_MODE_SIZE (int_mode)
 		&& (lwider == NULL
-		    || GET_MODE_SIZE (GET_MODE (l->elt->val_rtx))
+		    || GET_MODE_SIZE (lmode)
 		       < GET_MODE_SIZE (GET_MODE (lwider->elt->val_rtx))))
 	      {
 		struct elt_loc_list *el;
 		if (i < FIRST_PSEUDO_REGISTER
-		    && hard_regno_nregs[i][GET_MODE (l->elt->val_rtx)] != 1)
+		    && hard_regno_nregs[i][lmode] != 1)
 		  continue;
 		for (el = l->elt->locs; el; el = el->next)
 		  if (!REG_P (el->loc))
@@ -2048,7 +2050,7 @@ cselib_lookup_1 (rtx x, machine_mode mode,
 	      }
 	  if (lwider)
 	    {
-	      rtx sub = lowpart_subreg (mode, lwider->elt->val_rtx,
+	      rtx sub = lowpart_subreg (int_mode, lwider->elt->val_rtx,
 					GET_MODE (lwider->elt->val_rtx));
 	      if (sub)
 		new_elt_loc_list (e, sub);
diff --git a/gcc/dojump.c b/gcc/dojump.c
index 34492f3..b084253 100644
--- a/gcc/dojump.c
+++ b/gcc/dojump.c
@@ -203,6 +203,7 @@ do_jump_1 (enum tree_code code, tree op0, tree op1,
 {
   machine_mode mode;
   rtx_code_label *drop_through_label = 0;
+  scalar_int_mode int_mode;
 
   switch (code)
     {
@@ -218,8 +219,8 @@ do_jump_1 (enum tree_code code, tree op0, tree op1,
         if (integer_zerop (op1))
 	  do_jump (op0, if_true_label, if_false_label,
 		   prob.invert ());
-        else if (GET_MODE_CLASS (TYPE_MODE (inner_type)) == MODE_INT
-                 && !can_compare_p (EQ, TYPE_MODE (inner_type), ccp_jump))
+	else if (is_int_mode (TYPE_MODE (inner_type), &int_mode)
+		 && !can_compare_p (EQ, int_mode, ccp_jump))
 	  do_jump_by_parts_equality (op0, op1, if_false_label, if_true_label,
 				     prob);
         else
@@ -239,8 +240,8 @@ do_jump_1 (enum tree_code code, tree op0, tree op1,
 
         if (integer_zerop (op1))
 	  do_jump (op0, if_false_label, if_true_label, prob);
-        else if (GET_MODE_CLASS (TYPE_MODE (inner_type)) == MODE_INT
-           && !can_compare_p (NE, TYPE_MODE (inner_type), ccp_jump))
+	else if (is_int_mode (TYPE_MODE (inner_type), &int_mode)
+		 && !can_compare_p (NE, int_mode, ccp_jump))
 	  do_jump_by_parts_equality (op0, op1, if_true_label, if_false_label,
 				     prob.invert ());
         else
@@ -251,10 +252,10 @@ do_jump_1 (enum tree_code code, tree op0, tree op1,
 
     case LT_EXPR:
       mode = TYPE_MODE (TREE_TYPE (op0));
-      if (GET_MODE_CLASS (mode) == MODE_INT
-          && ! can_compare_p (LT, mode, ccp_jump))
-	do_jump_by_parts_greater (op0, op1, 1, if_false_label, if_true_label,
-				  prob);
+      if (is_int_mode (mode, &int_mode)
+	  && ! can_compare_p (LT, int_mode, ccp_jump))
+	do_jump_by_parts_greater (op0, op1, 1, if_false_label,
+				  if_true_label, prob);
       else
 	do_compare_and_jump (op0, op1, LT, LTU, if_false_label, if_true_label,
 			     prob);
@@ -262,8 +263,8 @@ do_jump_1 (enum tree_code code, tree op0, tree op1,
 
     case LE_EXPR:
       mode = TYPE_MODE (TREE_TYPE (op0));
-      if (GET_MODE_CLASS (mode) == MODE_INT
-          && ! can_compare_p (LE, mode, ccp_jump))
+      if (is_int_mode (mode, &int_mode)
+	  && ! can_compare_p (LE, int_mode, ccp_jump))
 	do_jump_by_parts_greater (op0, op1, 0, if_true_label, if_false_label,
 				  prob.invert ());
       else
@@ -273,10 +274,10 @@ do_jump_1 (enum tree_code code, tree op0, tree op1,
 
     case GT_EXPR:
       mode = TYPE_MODE (TREE_TYPE (op0));
-      if (GET_MODE_CLASS (mode) == MODE_INT
-          && ! can_compare_p (GT, mode, ccp_jump))
-	do_jump_by_parts_greater (op0, op1, 0, if_false_label, if_true_label,
-				  prob);
+      if (is_int_mode (mode, &int_mode)
+	  && ! can_compare_p (GT, int_mode, ccp_jump))
+	do_jump_by_parts_greater (op0, op1, 0, if_false_label,
+				  if_true_label, prob);
       else
 	do_compare_and_jump (op0, op1, GT, GTU, if_false_label, if_true_label,
 			     prob);
@@ -284,8 +285,8 @@ do_jump_1 (enum tree_code code, tree op0, tree op1,
 
     case GE_EXPR:
       mode = TYPE_MODE (TREE_TYPE (op0));
-      if (GET_MODE_CLASS (mode) == MODE_INT
-          && ! can_compare_p (GE, mode, ccp_jump))
+      if (is_int_mode (mode, &int_mode)
+	  && ! can_compare_p (GE, int_mode, ccp_jump))
 	do_jump_by_parts_greater (op0, op1, 1, if_true_label, if_false_label,
 				  prob.invert ());
       else
@@ -1024,62 +1025,63 @@ do_compare_rtx_and_jump (rtx op0, rtx op1, enum rtx_code code, int unsignedp,
   if (! if_true_label)
     dummy_label = if_true_label = gen_label_rtx ();
 
-  if (GET_MODE_CLASS (mode) == MODE_INT
-      && ! can_compare_p (code, mode, ccp_jump))
+  scalar_int_mode int_mode;
+  if (is_int_mode (mode, &int_mode)
+      && ! can_compare_p (code, int_mode, ccp_jump))
     {
       switch (code)
 	{
 	case LTU:
-	  do_jump_by_parts_greater_rtx (mode, 1, op1, op0,
+	  do_jump_by_parts_greater_rtx (int_mode, 1, op1, op0,
 					if_false_label, if_true_label, prob);
 	  break;
 
 	case LEU:
-	  do_jump_by_parts_greater_rtx (mode, 1, op0, op1,
+	  do_jump_by_parts_greater_rtx (int_mode, 1, op0, op1,
 					if_true_label, if_false_label,
 					prob.invert ());
 	  break;
 
 	case GTU:
-	  do_jump_by_parts_greater_rtx (mode, 1, op0, op1,
+	  do_jump_by_parts_greater_rtx (int_mode, 1, op0, op1,
 					if_false_label, if_true_label, prob);
 	  break;
 
 	case GEU:
-	  do_jump_by_parts_greater_rtx (mode, 1, op1, op0,
+	  do_jump_by_parts_greater_rtx (int_mode, 1, op1, op0,
 					if_true_label, if_false_label,
 					prob.invert ());
 	  break;
 
 	case LT:
-	  do_jump_by_parts_greater_rtx (mode, 0, op1, op0,
+	  do_jump_by_parts_greater_rtx (int_mode, 0, op1, op0,
 					if_false_label, if_true_label, prob);
 	  break;
 
 	case LE:
-	  do_jump_by_parts_greater_rtx (mode, 0, op0, op1,
+	  do_jump_by_parts_greater_rtx (int_mode, 0, op0, op1,
 					if_true_label, if_false_label,
 					prob.invert ());
 	  break;
 
 	case GT:
-	  do_jump_by_parts_greater_rtx (mode, 0, op0, op1,
+	  do_jump_by_parts_greater_rtx (int_mode, 0, op0, op1,
 					if_false_label, if_true_label, prob);
 	  break;
 
 	case GE:
-	  do_jump_by_parts_greater_rtx (mode, 0, op1, op0,
+	  do_jump_by_parts_greater_rtx (int_mode, 0, op1, op0,
 					if_true_label, if_false_label,
 					prob.invert ());
 	  break;
 
 	case EQ:
-	  do_jump_by_parts_equality_rtx (mode, op0, op1, if_false_label,
+	  do_jump_by_parts_equality_rtx (int_mode, op0, op1, if_false_label,
 					 if_true_label, prob);
 	  break;
 
 	case NE:
-	  do_jump_by_parts_equality_rtx (mode, op0, op1, if_true_label,
+	  do_jump_by_parts_equality_rtx (int_mode, op0, op1, if_true_label,
 					 if_false_label,
 					 prob.invert ());
 	  break;
diff --git a/gcc/dse.c b/gcc/dse.c
index e664332..65b4b86 100644
--- a/gcc/dse.c
+++ b/gcc/dse.c
@@ -2185,11 +2185,14 @@ get_call_args (rtx call_insn, tree fn, rtx *args, int nargs)
        arg != void_list_node && idx < nargs;
        arg = TREE_CHAIN (arg), idx++)
     {
-      machine_mode mode = TYPE_MODE (TREE_VALUE (arg));
+      scalar_int_mode mode;
       rtx reg, link, tmp;
+
+      if (!is_int_mode (TYPE_MODE (TREE_VALUE (arg)), &mode))
+	return false;
+
       reg = targetm.calls.function_arg (args_so_far, mode, NULL_TREE, true);
-      if (!reg || !REG_P (reg) || GET_MODE (reg) != mode
-	  || GET_MODE_CLASS (mode) != MODE_INT)
+      if (!reg || !REG_P (reg) || GET_MODE (reg) != mode)
 	return false;
 
       for (link = CALL_INSN_FUNCTION_USAGE (call_insn);
@@ -2197,15 +2200,14 @@ get_call_args (rtx call_insn, tree fn, rtx *args, int nargs)
 	   link = XEXP (link, 1))
 	if (GET_CODE (XEXP (link, 0)) == USE)
 	  {
+	    scalar_int_mode arg_mode;
 	    args[idx] = XEXP (XEXP (link, 0), 0);
 	    if (REG_P (args[idx])
 		&& REGNO (args[idx]) == REGNO (reg)
 		&& (GET_MODE (args[idx]) == mode
-		    || (GET_MODE_CLASS (GET_MODE (args[idx])) == MODE_INT
-			&& (GET_MODE_SIZE (GET_MODE (args[idx]))
-			    <= UNITS_PER_WORD)
-			&& (GET_MODE_SIZE (GET_MODE (args[idx]))
-			    > GET_MODE_SIZE (mode)))))
+		    || (is_int_mode (GET_MODE (args[idx]), &arg_mode)
+			&& (GET_MODE_SIZE (arg_mode) <= UNITS_PER_WORD)
+			&& (GET_MODE_SIZE (arg_mode) > GET_MODE_SIZE (mode)))))
 	      break;
 	  }
       if (!link)
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index fdee009..f974f18 100644
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -18840,9 +18840,10 @@ rtl_for_decl_init (tree init, tree type)
     {
       tree enttype = TREE_TYPE (type);
       tree domain = TYPE_DOMAIN (type);
-      machine_mode mode = TYPE_MODE (enttype);
+      scalar_int_mode mode;
 
-      if (GET_MODE_CLASS (mode) == MODE_INT && GET_MODE_SIZE (mode) == 1
+      if (is_int_mode (TYPE_MODE (enttype), &mode)
+	  && GET_MODE_SIZE (mode) == 1
 	  && domain
 	  && integer_zerop (TYPE_MIN_VALUE (domain))
 	  && compare_tree_int (TYPE_MAX_VALUE (domain),
@@ -19323,9 +19324,10 @@ native_encode_initializer (tree init, unsigned char *array, int size)
       if (TREE_CODE (type) == ARRAY_TYPE)
 	{
 	  tree enttype = TREE_TYPE (type);
-	  machine_mode mode = TYPE_MODE (enttype);
+	  scalar_int_mode mode;
 
-	  if (GET_MODE_CLASS (mode) != MODE_INT || GET_MODE_SIZE (mode) != 1)
+	  if (!is_int_mode (TYPE_MODE (enttype), &mode)
+	      || GET_MODE_SIZE (mode) != 1)
 	    return false;
 	  if (int_size_in_bytes (type) != size)
 	    return false;
diff --git a/gcc/expmed.c b/gcc/expmed.c
index f7ac821..815c766 100644
--- a/gcc/expmed.c
+++ b/gcc/expmed.c
@@ -5446,8 +5446,9 @@ emit_store_flag_1 (rtx target, enum rtx_code code, rtx op0, rtx op1,
 
   /* If we are comparing a double-word integer with zero or -1, we can
      convert the comparison into one involving a single word.  */
-  if (GET_MODE_BITSIZE (mode) == BITS_PER_WORD * 2
-      && GET_MODE_CLASS (mode) == MODE_INT
+  scalar_int_mode int_mode;
+  if (is_int_mode (mode, &int_mode)
+      && GET_MODE_BITSIZE (int_mode) == BITS_PER_WORD * 2
       && (!MEM_P (op0) || ! MEM_VOLATILE_P (op0)))
     {
       rtx tem;
@@ -5458,8 +5459,8 @@ emit_store_flag_1 (rtx target, enum rtx_code code, rtx op0, rtx op1,
 
 	  /* Do a logical OR or AND of the two words and compare the
 	     result.  */
-	  op00 = simplify_gen_subreg (word_mode, op0, mode, 0);
-	  op01 = simplify_gen_subreg (word_mode, op0, mode, UNITS_PER_WORD);
+	  op00 = simplify_gen_subreg (word_mode, op0, int_mode, 0);
+	  op01 = simplify_gen_subreg (word_mode, op0, int_mode, UNITS_PER_WORD);
 	  tem = expand_binop (word_mode,
 			      op1 == const0_rtx ? ior_optab : and_optab,
 			      op00, op01, NULL_RTX, unsignedp,
@@ -5474,9 +5475,9 @@ emit_store_flag_1 (rtx target, enum rtx_code code, rtx op0, rtx op1,
 	  rtx op0h;
 
 	  /* If testing the sign bit, can just test on high word.  */
-	  op0h = simplify_gen_subreg (word_mode, op0, mode,
+	  op0h = simplify_gen_subreg (word_mode, op0, int_mode,
 				      subreg_highpart_offset (word_mode,
-							      mode));
+							      int_mode));
 	  tem = emit_store_flag (NULL_RTX, code, op0h, op1, word_mode,
 				 unsignedp, normalizep);
 	}
@@ -5501,21 +5502,21 @@ emit_store_flag_1 (rtx target, enum rtx_code code, rtx op0, rtx op1,
   /* If this is A < 0 or A >= 0, we can do this by taking the ones
      complement of A (for GE) and shifting the sign bit to the low bit.  */
   if (op1 == const0_rtx && (code == LT || code == GE)
-      && GET_MODE_CLASS (mode) == MODE_INT
+      && is_int_mode (mode, &int_mode)
       && (normalizep || STORE_FLAG_VALUE == 1
-	  || val_signbit_p (mode, STORE_FLAG_VALUE)))
+	  || val_signbit_p (int_mode, STORE_FLAG_VALUE)))
     {
       subtarget = target;
 
       if (!target)
-	target_mode = mode;
+	target_mode = int_mode;
 
       /* If the result is to be wider than OP0, it is best to convert it
 	 first.  If it is to be narrower, it is *incorrect* to convert it
 	 first.  */
-      else if (GET_MODE_SIZE (target_mode) > GET_MODE_SIZE (mode))
+      else if (GET_MODE_SIZE (target_mode) > GET_MODE_SIZE (int_mode))
 	{
-	  op0 = convert_modes (target_mode, mode, op0, 0);
+	  op0 = convert_modes (target_mode, int_mode, op0, 0);
 	  mode = target_mode;
 	}
 
@@ -5925,8 +5926,9 @@ emit_store_flag (rtx target, enum rtx_code code, rtx op0, rtx op1,
 
   /* The remaining tricks only apply to integer comparisons.  */
 
-  if (GET_MODE_CLASS (mode) == MODE_INT)
-    return emit_store_flag_int (target, subtarget, code, op0, op1, mode,
+  scalar_int_mode int_mode;
+  if (is_int_mode (mode, &int_mode))
+    return emit_store_flag_int (target, subtarget, code, op0, op1, int_mode,
 				unsignedp, normalizep, trueval);
 
   return 0;
diff --git a/gcc/expr.c b/gcc/expr.c
index 776c719..225b8c2 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -630,6 +630,7 @@ rtx
 convert_modes (machine_mode mode, machine_mode oldmode, rtx x, int unsignedp)
 {
   rtx temp;
+  scalar_int_mode int_mode;
 
   /* If FROM is a SUBREG that indicates that we have already done at least
      the required extension, strip it.  */
@@ -645,7 +646,8 @@ convert_modes (machine_mode mode, machine_mode oldmode, rtx x, int unsignedp)
   if (mode == oldmode)
     return x;
 
-  if (CONST_SCALAR_INT_P (x) && GET_MODE_CLASS (mode) == MODE_INT)
+  if (CONST_SCALAR_INT_P (x)
+      && is_int_mode (mode, &int_mode))
     {
       /* If the caller did not tell us the old mode, then there is not
 	 much to do with respect to canonicalization.  We have to
@@ -653,24 +655,24 @@ convert_modes (machine_mode mode, machine_mode oldmode, rtx x, int unsignedp)
       if (GET_MODE_CLASS (oldmode) != MODE_INT)
 	oldmode = MAX_MODE_INT;
       wide_int w = wide_int::from (rtx_mode_t (x, oldmode),
-				   GET_MODE_PRECISION (mode),
+				   GET_MODE_PRECISION (int_mode),
 				   unsignedp ? UNSIGNED : SIGNED);
-      return immed_wide_int_const (w, mode);
+      return immed_wide_int_const (w, int_mode);
     }
 
   /* We can do this with a gen_lowpart if both desired and current modes
      are integer, and this is either a constant integer, a register, or a
      non-volatile MEM. */
-  if (GET_MODE_CLASS (mode) == MODE_INT
-      && GET_MODE_CLASS (oldmode) == MODE_INT
-      && GET_MODE_PRECISION (mode) <= GET_MODE_PRECISION (oldmode)
-      && ((MEM_P (x) && !MEM_VOLATILE_P (x) && direct_load[(int) mode])
+  scalar_int_mode int_oldmode;
+  if (is_int_mode (mode, &int_mode)
+      && is_int_mode (oldmode, &int_oldmode)
+      && GET_MODE_PRECISION (int_mode) <= GET_MODE_PRECISION (int_oldmode)
+      && ((MEM_P (x) && !MEM_VOLATILE_P (x) && direct_load[(int) int_mode])
           || (REG_P (x)
               && (!HARD_REGISTER_P (x)
-                  || HARD_REGNO_MODE_OK (REGNO (x), mode))
-              && TRULY_NOOP_TRUNCATION_MODES_P (mode, GET_MODE (x)))))
-
-   return gen_lowpart (mode, x);
+                  || HARD_REGNO_MODE_OK (REGNO (x), int_mode))
+              && TRULY_NOOP_TRUNCATION_MODES_P (int_mode, GET_MODE (x)))))
+   return gen_lowpart (int_mode, x);
 
   /* Converting from integer constant into mode is always equivalent to an
      subreg operation.  */
@@ -6872,20 +6874,21 @@ store_field (rtx target, HOST_WIDE_INT bitsize, HOST_WIDE_INT bitpos,
 	 case, if it has reverse storage order, it needs to be accessed as a
 	 scalar field with reverse storage order and we must first put the
 	 value into target order.  */
+      scalar_int_mode temp_mode;
       if (AGGREGATE_TYPE_P (TREE_TYPE (exp))
-	  && GET_MODE_CLASS (GET_MODE (temp)) == MODE_INT)
+	  && is_int_mode (GET_MODE (temp), &temp_mode))
 	{
-	  HOST_WIDE_INT size = GET_MODE_BITSIZE (GET_MODE (temp));
+	  HOST_WIDE_INT size = GET_MODE_BITSIZE (temp_mode);
 
 	  reverse = TYPE_REVERSE_STORAGE_ORDER (TREE_TYPE (exp));
 
 	  if (reverse)
-	    temp = flip_storage_order (GET_MODE (temp), temp);
+	    temp = flip_storage_order (temp_mode, temp);
 
 	  if (bitsize < size
 	      && reverse ? !BYTES_BIG_ENDIAN : BYTES_BIG_ENDIAN
 	      && !(mode == BLKmode && bitsize > BITS_PER_WORD))
-	    temp = expand_shift (RSHIFT_EXPR, GET_MODE (temp), temp,
+	    temp = expand_shift (RSHIFT_EXPR, temp_mode, temp,
 				 size - bitsize, NULL_RTX, 1);
 	}
 
@@ -9959,13 +9962,15 @@ expand_expr_real_1 (tree exp, rtx target, machine_mode tmode,
 	    || GET_MODE_CLASS (mode) == MODE_VECTOR_ACCUM
 	    || GET_MODE_CLASS (mode) == MODE_VECTOR_UACCUM)
 	  return const_vector_from_tree (exp);
-	if (GET_MODE_CLASS (mode) == MODE_INT)
+	scalar_int_mode int_mode;
+	if (is_int_mode (mode, &int_mode))
 	  {
 	    if (VECTOR_BOOLEAN_TYPE_P (TREE_TYPE (exp)))
 	      return const_scalar_mask_from_tree (exp);
 	    else
 	      {
-		tree type_for_mode = lang_hooks.types.type_for_mode (mode, 1);
+		tree type_for_mode
+		  = lang_hooks.types.type_for_mode (int_mode, 1);
 		if (type_for_mode)
 		  tmp = fold_unary_loc (loc, VIEW_CONVERT_EXPR,
 					type_for_mode, exp);
@@ -10360,9 +10365,9 @@ expand_expr_real_1 (tree exp, rtx target, machine_mode tmode,
 		    && compare_tree_int (index1, TREE_STRING_LENGTH (init)) < 0)
 		  {
 		    tree type = TREE_TYPE (TREE_TYPE (init));
-		    machine_mode mode = TYPE_MODE (type);
+		    scalar_int_mode mode;
 
-		    if (GET_MODE_CLASS (mode) == MODE_INT
+		    if (is_int_mode (TYPE_MODE (type), &mode)
 			&& GET_MODE_SIZE (mode) == 1)
 		      return gen_int_mode (TREE_STRING_POINTER (init)
 					   [TREE_INT_CST_LOW (index1)],
@@ -10380,6 +10385,7 @@ expand_expr_real_1 (tree exp, rtx target, machine_mode tmode,
 	{
 	  unsigned HOST_WIDE_INT idx;
 	  tree field, value;
+	  scalar_int_mode field_mode;
 
 	  FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (treeop0),
 				    idx, field, value)
@@ -10392,8 +10398,8 @@ expand_expr_real_1 (tree exp, rtx target, machine_mode tmode,
 		   the bitfield does not meet either of those conditions,
 		   we can't do this optimization.  */
 		&& (! DECL_BIT_FIELD (field)
-		    || ((GET_MODE_CLASS (DECL_MODE (field)) == MODE_INT)
-			&& (GET_MODE_PRECISION (DECL_MODE (field))
+		    || (is_int_mode (DECL_MODE (field), &field_mode)
+			&& (GET_MODE_PRECISION (field_mode)
 			    <= HOST_BITS_PER_WIDE_INT))))
 	      {
 		if (DECL_BIT_FIELD (field)
@@ -10727,18 +10733,19 @@ expand_expr_real_1 (tree exp, rtx target, machine_mode tmode,
 	       and this is for big-endian data, we must put the field
 	       into the high-order bits.  And we must also put it back
 	       into memory order if it has been previously reversed.  */
+	    scalar_int_mode op0_mode;
 	    if (TREE_CODE (type) == RECORD_TYPE
-		&& GET_MODE_CLASS (GET_MODE (op0)) == MODE_INT)
+		&& is_int_mode (GET_MODE (op0), &op0_mode))
 	      {
-		HOST_WIDE_INT size = GET_MODE_BITSIZE (GET_MODE (op0));
+		HOST_WIDE_INT size = GET_MODE_BITSIZE (op0_mode);
 
 		if (bitsize < size
 		    && reversep ? !BYTES_BIG_ENDIAN : BYTES_BIG_ENDIAN)
-		  op0 = expand_shift (LSHIFT_EXPR, GET_MODE (op0), op0,
+		  op0 = expand_shift (LSHIFT_EXPR, op0_mode, op0,
 				      size - bitsize, op0, 1);
 
 		if (reversep)
-		  op0 = flip_storage_order (GET_MODE (op0), op0);
+		  op0 = flip_storage_order (op0_mode, op0);
 	      }
 
 	    /* If the result type is BLKmode, store the data into a temporary
diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index 27f4f4e..b9f2a39 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -13652,14 +13652,15 @@ fold_read_from_constant_string (tree exp)
 	  string = exp1;
 	}
 
+      scalar_int_mode char_mode;
       if (string
 	  && TYPE_MODE (TREE_TYPE (exp)) == TYPE_MODE (TREE_TYPE (TREE_TYPE (string)))
 	  && TREE_CODE (string) == STRING_CST
 	  && TREE_CODE (index) == INTEGER_CST
 	  && compare_tree_int (index, TREE_STRING_LENGTH (string)) < 0
-	  && (GET_MODE_CLASS (TYPE_MODE (TREE_TYPE (TREE_TYPE (string))))
-	      == MODE_INT)
-	  && (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (TREE_TYPE (string)))) == 1))
+	  && is_int_mode (TYPE_MODE (TREE_TYPE (TREE_TYPE (string))),
+			  &char_mode)
+	  && GET_MODE_SIZE (char_mode) == 1)
 	return build_int_cst_type (TREE_TYPE (exp),
 				   (TREE_STRING_POINTER (string)
 				    [TREE_INT_CST_LOW (index)]));
diff --git a/gcc/gimple-ssa-sprintf.c b/gcc/gimple-ssa-sprintf.c
index 519e996..7899e09 100644
--- a/gcc/gimple-ssa-sprintf.c
+++ b/gcc/gimple-ssa-sprintf.c
@@ -528,8 +528,9 @@ get_format_string (tree format, location_t *ploc)
 
   tree type = TREE_TYPE (format);
 
-  if (GET_MODE_CLASS (TYPE_MODE (TREE_TYPE (type))) != MODE_INT
-      || GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (type))) != 1)
+  scalar_int_mode char_mode;
+  if (!is_int_mode (TYPE_MODE (TREE_TYPE (type)), &char_mode)
+      || GET_MODE_SIZE (char_mode) != 1)
     {
       /* Wide format string.  */
       return NULL;
diff --git a/gcc/go/ChangeLog b/gcc/go/ChangeLog
index f65a1d4..ea47870 100644
--- a/gcc/go/ChangeLog
+++ b/gcc/go/ChangeLog
@@ -2,6 +2,12 @@
 	    Alan Hayward  <alan.hayward@arm.com>
 	    David Sherwood  <david.sherwood@arm.com>
 
+	* go-lang.c (go_langhook_type_for_mode): Use is_int_mode.
+
+2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
+	    Alan Hayward  <alan.hayward@arm.com>
+	    David Sherwood  <david.sherwood@arm.com>
+
 	* go-lang.c (go_langhook_type_for_mode): Use is_float_mode.
 
 2017-08-07  Martin Liska  <mliska@suse.cz>
diff --git a/gcc/go/go-lang.c b/gcc/go/go-lang.c
index 614d890..d470d5a 100644
--- a/gcc/go/go-lang.c
+++ b/gcc/go/go-lang.c
@@ -382,10 +382,11 @@ go_langhook_type_for_mode (machine_mode mode, int unsignedp)
       return NULL_TREE;
     }
 
+  scalar_int_mode imode;
   scalar_float_mode fmode;
   enum mode_class mc = GET_MODE_CLASS (mode);
-  if (mc == MODE_INT)
-    return go_langhook_type_for_size (GET_MODE_BITSIZE (mode), unsignedp);
+  if (is_int_mode (mode, &imode))
+    return go_langhook_type_for_size (GET_MODE_BITSIZE (imode), unsignedp);
   else if (is_float_mode (mode, &fmode))
     {
       switch (GET_MODE_BITSIZE (fmode))
diff --git a/gcc/machmode.h b/gcc/machmode.h
index 6fd10b4..497b0fb 100644
--- a/gcc/machmode.h
+++ b/gcc/machmode.h
@@ -695,6 +695,21 @@ struct int_n_data_t {
 extern bool int_n_enabled_p[NUM_INT_N_ENTS];
 extern const int_n_data_t int_n_data[NUM_INT_N_ENTS];
 
+/* Return true if MODE has class MODE_INT, storing it as a scalar_int_mode
+   in *INT_MODE if so.  */
+
+template<typename T>
+inline bool
+is_int_mode (machine_mode mode, T *int_mode)
+{
+  if (GET_MODE_CLASS (mode) == MODE_INT)
+    {
+      *int_mode = scalar_int_mode (scalar_int_mode::from_int (mode));
+      return true;
+    }
+  return false;
+}
+
 /* Return true if MODE has class MODE_FLOAT, storing it as a
    scalar_float_mode in *FLOAT_MODE if so.  */
 
diff --git a/gcc/optabs-libfuncs.c b/gcc/optabs-libfuncs.c
index 151a473..5ad3c6d 100644
--- a/gcc/optabs-libfuncs.c
+++ b/gcc/optabs-libfuncs.c
@@ -189,8 +189,9 @@ gen_int_libfunc (optab optable, const char *opname, char suffix,
 {
   int maxsize = 2 * BITS_PER_WORD;
   int minsize = BITS_PER_WORD;
+  scalar_int_mode int_mode;
 
-  if (GET_MODE_CLASS (mode) != MODE_INT)
+  if (!is_int_mode (mode, &int_mode))
     return;
   if (maxsize < LONG_LONG_TYPE_SIZE)
     maxsize = LONG_LONG_TYPE_SIZE;
@@ -198,10 +199,10 @@ gen_int_libfunc (optab optable, const char *opname, char suffix,
       && (trapv_binoptab_p (optable)
 	  || trapv_unoptab_p (optable)))
     minsize = INT_TYPE_SIZE;
-  if (GET_MODE_BITSIZE (mode) < minsize
-      || GET_MODE_BITSIZE (mode) > maxsize)
+  if (GET_MODE_BITSIZE (int_mode) < minsize
+      || GET_MODE_BITSIZE (int_mode) > maxsize)
     return;
-  gen_libfunc (optable, opname, suffix, mode);
+  gen_libfunc (optable, opname, suffix, int_mode);
 }
 
 /* Like gen_libfunc, but verify that FP and set decimal prefix if needed.  */
diff --git a/gcc/optabs.c b/gcc/optabs.c
index ee3b4e9..65a098e 100644
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -1113,6 +1113,7 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
        ? OPTAB_WIDEN : methods);
   enum mode_class mclass;
   machine_mode wider_mode;
+  scalar_int_mode int_mode;
   rtx libfunc;
   rtx temp;
   rtx_insn *entry_last = get_last_insn ();
@@ -1161,22 +1162,22 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
 	&& optab_handler (rotr_optab, mode) != CODE_FOR_nothing)
        || (binoptab == rotr_optab
 	   && optab_handler (rotl_optab, mode) != CODE_FOR_nothing))
-      && mclass == MODE_INT)
+      && is_int_mode (mode, &int_mode))
     {
       optab otheroptab = (binoptab == rotl_optab ? rotr_optab : rotl_optab);
       rtx newop1;
-      unsigned int bits = GET_MODE_PRECISION (mode);
+      unsigned int bits = GET_MODE_PRECISION (int_mode);
 
       if (CONST_INT_P (op1))
         newop1 = GEN_INT (bits - INTVAL (op1));
-      else if (targetm.shift_truncation_mask (mode) == bits - 1)
+      else if (targetm.shift_truncation_mask (int_mode) == bits - 1)
         newop1 = negate_rtx (GET_MODE (op1), op1);
       else
         newop1 = expand_binop (GET_MODE (op1), sub_optab,
 			       gen_int_mode (bits, GET_MODE (op1)), op1,
 			       NULL_RTX, unsignedp, OPTAB_DIRECT);
 
-      temp = expand_binop_directly (mode, otheroptab, op0, newop1,
+      temp = expand_binop_directly (int_mode, otheroptab, op0, newop1,
 				    target, unsignedp, methods, last);
       if (temp)
 	return temp;
@@ -1320,8 +1321,8 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
 
   /* These can be done a word at a time.  */
   if ((binoptab == and_optab || binoptab == ior_optab || binoptab == xor_optab)
-      && mclass == MODE_INT
-      && GET_MODE_SIZE (mode) > UNITS_PER_WORD
+      && is_int_mode (mode, &int_mode)
+      && GET_MODE_SIZE (int_mode) > UNITS_PER_WORD
       && optab_handler (binoptab, word_mode) != CODE_FOR_nothing)
     {
       int i;
@@ -1333,17 +1334,17 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
 	  || target == op0
 	  || target == op1
 	  || !valid_multiword_target_p (target))
-	target = gen_reg_rtx (mode);
+	target = gen_reg_rtx (int_mode);
 
       start_sequence ();
 
       /* Do the actual arithmetic.  */
-      for (i = 0; i < GET_MODE_BITSIZE (mode) / BITS_PER_WORD; i++)
+      for (i = 0; i < GET_MODE_BITSIZE (int_mode) / BITS_PER_WORD; i++)
 	{
-	  rtx target_piece = operand_subword (target, i, 1, mode);
+	  rtx target_piece = operand_subword (target, i, 1, int_mode);
 	  rtx x = expand_binop (word_mode, binoptab,
-				operand_subword_force (op0, i, mode),
-				operand_subword_force (op1, i, mode),
+				operand_subword_force (op0, i, int_mode),
+				operand_subword_force (op1, i, int_mode),
 				target_piece, unsignedp, next_methods);
 
 	  if (x == 0)
@@ -1356,7 +1357,7 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
       insns = get_insns ();
       end_sequence ();
 
-      if (i == GET_MODE_BITSIZE (mode) / BITS_PER_WORD)
+      if (i == GET_MODE_BITSIZE (int_mode) / BITS_PER_WORD)
 	{
 	  emit_insn (insns);
 	  return target;
@@ -1366,10 +1367,10 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
   /* Synthesize double word shifts from single word shifts.  */
   if ((binoptab == lshr_optab || binoptab == ashl_optab
        || binoptab == ashr_optab)
-      && mclass == MODE_INT
+      && is_int_mode (mode, &int_mode)
       && (CONST_INT_P (op1) || optimize_insn_for_speed_p ())
-      && GET_MODE_SIZE (mode) == 2 * UNITS_PER_WORD
-      && GET_MODE_PRECISION (mode) == GET_MODE_BITSIZE (mode)
+      && GET_MODE_SIZE (int_mode) == 2 * UNITS_PER_WORD
+      && GET_MODE_PRECISION (int_mode) == GET_MODE_BITSIZE (int_mode)
       && optab_handler (binoptab, word_mode) != CODE_FOR_nothing
       && optab_handler (ashl_optab, word_mode) != CODE_FOR_nothing
       && optab_handler (lshr_optab, word_mode) != CODE_FOR_nothing)
@@ -1377,7 +1378,7 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
       unsigned HOST_WIDE_INT shift_mask, double_shift_mask;
       machine_mode op1_mode;
 
-      double_shift_mask = targetm.shift_truncation_mask (mode);
+      double_shift_mask = targetm.shift_truncation_mask (int_mode);
       shift_mask = targetm.shift_truncation_mask (word_mode);
       op1_mode = GET_MODE (op1) != VOIDmode ? GET_MODE (op1) : word_mode;
 
@@ -1405,7 +1406,7 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
 	      || target == op0
 	      || target == op1
 	      || !valid_multiword_target_p (target))
-	    target = gen_reg_rtx (mode);
+	    target = gen_reg_rtx (int_mode);
 
 	  start_sequence ();
 
@@ -1417,11 +1418,11 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
 	  left_shift = binoptab == ashl_optab;
 	  outof_word = left_shift ^ ! WORDS_BIG_ENDIAN;
 
-	  outof_target = operand_subword (target, outof_word, 1, mode);
-	  into_target = operand_subword (target, 1 - outof_word, 1, mode);
+	  outof_target = operand_subword (target, outof_word, 1, int_mode);
+	  into_target = operand_subword (target, 1 - outof_word, 1, int_mode);
 
-	  outof_input = operand_subword_force (op0, outof_word, mode);
-	  into_input = operand_subword_force (op0, 1 - outof_word, mode);
+	  outof_input = operand_subword_force (op0, outof_word, int_mode);
+	  into_input = operand_subword_force (op0, 1 - outof_word, int_mode);
 
 	  if (expand_doubleword_shift (op1_mode, binoptab,
 				       outof_input, into_input, op1,
@@ -1440,9 +1441,9 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
 
   /* Synthesize double word rotates from single word shifts.  */
   if ((binoptab == rotl_optab || binoptab == rotr_optab)
-      && mclass == MODE_INT
+      && is_int_mode (mode, &int_mode)
       && CONST_INT_P (op1)
-      && GET_MODE_PRECISION (mode) == 2 * BITS_PER_WORD
+      && GET_MODE_PRECISION (int_mode) == 2 * BITS_PER_WORD
       && optab_handler (ashl_optab, word_mode) != CODE_FOR_nothing
       && optab_handler (lshr_optab, word_mode) != CODE_FOR_nothing)
     {
@@ -1463,7 +1464,7 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
 	  || target == op1
 	  || !REG_P (target)
 	  || !valid_multiword_target_p (target))
-	target = gen_reg_rtx (mode);
+	target = gen_reg_rtx (int_mode);
 
       start_sequence ();
 
@@ -1477,11 +1478,11 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
       left_shift = (binoptab == rotl_optab);
       outof_word = left_shift ^ ! WORDS_BIG_ENDIAN;
 
-      outof_target = operand_subword (target, outof_word, 1, mode);
-      into_target = operand_subword (target, 1 - outof_word, 1, mode);
+      outof_target = operand_subword (target, outof_word, 1, int_mode);
+      into_target = operand_subword (target, 1 - outof_word, 1, int_mode);
 
-      outof_input = operand_subword_force (op0, outof_word, mode);
-      into_input = operand_subword_force (op0, 1 - outof_word, mode);
+      outof_input = operand_subword_force (op0, outof_word, int_mode);
+      into_input = operand_subword_force (op0, 1 - outof_word, int_mode);
 
       if (shift_count == BITS_PER_WORD)
 	{
@@ -1557,13 +1558,13 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
 
   /* These can be done a word at a time by propagating carries.  */
   if ((binoptab == add_optab || binoptab == sub_optab)
-      && mclass == MODE_INT
-      && GET_MODE_SIZE (mode) >= 2 * UNITS_PER_WORD
+      && is_int_mode (mode, &int_mode)
+      && GET_MODE_SIZE (int_mode) >= 2 * UNITS_PER_WORD
       && optab_handler (binoptab, word_mode) != CODE_FOR_nothing)
     {
       unsigned int i;
       optab otheroptab = binoptab == add_optab ? sub_optab : add_optab;
-      const unsigned int nwords = GET_MODE_BITSIZE (mode) / BITS_PER_WORD;
+      const unsigned int nwords = GET_MODE_BITSIZE (int_mode) / BITS_PER_WORD;
       rtx carry_in = NULL_RTX, carry_out = NULL_RTX;
       rtx xop0, xop1, xtarget;
 
@@ -1577,10 +1578,10 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
 #endif
 
       /* Prepare the operands.  */
-      xop0 = force_reg (mode, op0);
-      xop1 = force_reg (mode, op1);
+      xop0 = force_reg (int_mode, op0);
+      xop1 = force_reg (int_mode, op1);
 
-      xtarget = gen_reg_rtx (mode);
+      xtarget = gen_reg_rtx (int_mode);
 
       if (target == 0 || !REG_P (target) || !valid_multiword_target_p (target))
 	target = xtarget;
@@ -1593,9 +1594,9 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
       for (i = 0; i < nwords; i++)
 	{
 	  int index = (WORDS_BIG_ENDIAN ? nwords - i - 1 : i);
-	  rtx target_piece = operand_subword (xtarget, index, 1, mode);
-	  rtx op0_piece = operand_subword_force (xop0, index, mode);
-	  rtx op1_piece = operand_subword_force (xop1, index, mode);
+	  rtx target_piece = operand_subword (xtarget, index, 1, int_mode);
+	  rtx op0_piece = operand_subword_force (xop0, index, int_mode);
+	  rtx op1_piece = operand_subword_force (xop1, index, int_mode);
 	  rtx x;
 
 	  /* Main add/subtract of the input operands.  */
@@ -1654,16 +1655,16 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
 	  carry_in = carry_out;
 	}
 
-      if (i == GET_MODE_BITSIZE (mode) / (unsigned) BITS_PER_WORD)
+      if (i == GET_MODE_BITSIZE (int_mode) / (unsigned) BITS_PER_WORD)
 	{
-	  if (optab_handler (mov_optab, mode) != CODE_FOR_nothing
+	  if (optab_handler (mov_optab, int_mode) != CODE_FOR_nothing
 	      || ! rtx_equal_p (target, xtarget))
 	    {
 	      rtx_insn *temp = emit_move_insn (target, xtarget);
 
 	      set_dst_reg_note (temp, REG_EQUAL,
 				gen_rtx_fmt_ee (optab_to_code (binoptab),
-						mode, copy_rtx (xop0),
+						int_mode, copy_rtx (xop0),
 						copy_rtx (xop1)),
 				target);
 	    }
@@ -1683,26 +1684,26 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
      try using a signed widening multiply.  */
 
   if (binoptab == smul_optab
-      && mclass == MODE_INT
-      && GET_MODE_SIZE (mode) == 2 * UNITS_PER_WORD
+      && is_int_mode (mode, &int_mode)
+      && GET_MODE_SIZE (int_mode) == 2 * UNITS_PER_WORD
       && optab_handler (smul_optab, word_mode) != CODE_FOR_nothing
       && optab_handler (add_optab, word_mode) != CODE_FOR_nothing)
     {
       rtx product = NULL_RTX;
-      if (widening_optab_handler (umul_widen_optab, mode, word_mode)
-	    != CODE_FOR_nothing)
+      if (widening_optab_handler (umul_widen_optab, int_mode, word_mode)
+	  != CODE_FOR_nothing)
 	{
-	  product = expand_doubleword_mult (mode, op0, op1, target,
+	  product = expand_doubleword_mult (int_mode, op0, op1, target,
 					    true, methods);
 	  if (!product)
 	    delete_insns_since (last);
 	}
 
       if (product == NULL_RTX
-	  && widening_optab_handler (smul_widen_optab, mode, word_mode)
-		!= CODE_FOR_nothing)
+	  && (widening_optab_handler (smul_widen_optab, int_mode, word_mode)
+	      != CODE_FOR_nothing))
 	{
-	  product = expand_doubleword_mult (mode, op0, op1, target,
+	  product = expand_doubleword_mult (int_mode, op0, op1, target,
 					    false, methods);
 	  if (!product)
 	    delete_insns_since (last);
@@ -1710,13 +1711,13 @@ expand_binop (machine_mode mode, optab binoptab, rtx op0, rtx op1,
 
       if (product != NULL_RTX)
 	{
-	  if (optab_handler (mov_optab, mode) != CODE_FOR_nothing)
+	  if (optab_handler (mov_optab, int_mode) != CODE_FOR_nothing)
 	    {
 	      rtx_insn *move = emit_move_insn (target ? target : product,
 					       product);
 	      set_dst_reg_note (move,
 				REG_EQUAL,
-				gen_rtx_fmt_ee (MULT, mode,
+				gen_rtx_fmt_ee (MULT, int_mode,
 						copy_rtx (op0),
 						copy_rtx (op1)),
 				target ? target : product);
@@ -2696,6 +2697,7 @@ expand_unop (machine_mode mode, optab unoptab, rtx op0, rtx target,
 {
   enum mode_class mclass = GET_MODE_CLASS (mode);
   machine_mode wider_mode;
+  scalar_int_mode int_mode;
   scalar_float_mode float_mode;
   rtx temp;
   rtx libfunc;
@@ -2853,24 +2855,24 @@ expand_unop (machine_mode mode, optab unoptab, rtx op0, rtx target,
 
   /* These can be done a word at a time.  */
   if (unoptab == one_cmpl_optab
-      && mclass == MODE_INT
-      && GET_MODE_SIZE (mode) > UNITS_PER_WORD
+      && is_int_mode (mode, &int_mode)
+      && GET_MODE_SIZE (int_mode) > UNITS_PER_WORD
       && optab_handler (unoptab, word_mode) != CODE_FOR_nothing)
     {
       int i;
       rtx_insn *insns;
 
       if (target == 0 || target == op0 || !valid_multiword_target_p (target))
-	target = gen_reg_rtx (mode);
+	target = gen_reg_rtx (int_mode);
 
       start_sequence ();
 
       /* Do the actual arithmetic.  */
-      for (i = 0; i < GET_MODE_BITSIZE (mode) / BITS_PER_WORD; i++)
+      for (i = 0; i < GET_MODE_BITSIZE (int_mode) / BITS_PER_WORD; i++)
 	{
-	  rtx target_piece = operand_subword (target, i, 1, mode);
+	  rtx target_piece = operand_subword (target, i, 1, int_mode);
 	  rtx x = expand_unop (word_mode, unoptab,
-			       operand_subword_force (op0, i, mode),
+			       operand_subword_force (op0, i, int_mode),
 			       target_piece, unsignedp);
 
 	  if (target_piece != x)
@@ -3116,18 +3118,20 @@ expand_abs_nojump (machine_mode mode, rtx op0, rtx target,
      value of X as (((signed) x >> (W-1)) ^ x) - ((signed) x >> (W-1)),
      where W is the width of MODE.  */
 
-  if (GET_MODE_CLASS (mode) == MODE_INT
+  scalar_int_mode int_mode;
+  if (is_int_mode (mode, &int_mode)
       && BRANCH_COST (optimize_insn_for_speed_p (),
 	      	      false) >= 2)
     {
-      rtx extended = expand_shift (RSHIFT_EXPR, mode, op0,
-				   GET_MODE_PRECISION (mode) - 1,
+      rtx extended = expand_shift (RSHIFT_EXPR, int_mode, op0,
+				   GET_MODE_PRECISION (int_mode) - 1,
 				   NULL_RTX, 0);
 
-      temp = expand_binop (mode, xor_optab, extended, op0, target, 0,
+      temp = expand_binop (int_mode, xor_optab, extended, op0, target, 0,
 			   OPTAB_LIB_WIDEN);
       if (temp != 0)
-	temp = expand_binop (mode, result_unsignedp ? sub_optab : subv_optab,
+	temp = expand_binop (int_mode,
+			     result_unsignedp ? sub_optab : subv_optab,
                              temp, extended, target, 0, OPTAB_LIB_WIDEN);
 
       if (temp != 0)
@@ -3220,15 +3224,16 @@ expand_one_cmpl_abs_nojump (machine_mode mode, rtx op0, rtx target)
   /* If this machine has expensive jumps, we can do one's complement
      absolute value of X as (((signed) x >> (W-1)) ^ x).  */
 
-  if (GET_MODE_CLASS (mode) == MODE_INT
+  scalar_int_mode int_mode;
+  if (is_int_mode (mode, &int_mode)
       && BRANCH_COST (optimize_insn_for_speed_p (),
 	             false) >= 2)
     {
-      rtx extended = expand_shift (RSHIFT_EXPR, mode, op0,
-				   GET_MODE_PRECISION (mode) - 1,
+      rtx extended = expand_shift (RSHIFT_EXPR, int_mode, op0,
+				   GET_MODE_PRECISION (int_mode) - 1,
 				   NULL_RTX, 0);
 
-      temp = expand_binop (mode, xor_optab, extended, op0, target, 0,
+      temp = expand_binop (int_mode, xor_optab, extended, op0, target, 0,
 			   OPTAB_LIB_WIDEN);
 
       if (temp != 0)
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c
index 83e98b6..c4fd0e9 100644
--- a/gcc/simplify-rtx.c
+++ b/gcc/simplify-rtx.c
@@ -77,11 +77,12 @@ mode_signbit_p (machine_mode mode, const_rtx x)
 {
   unsigned HOST_WIDE_INT val;
   unsigned int width;
+  scalar_int_mode int_mode;
 
-  if (GET_MODE_CLASS (mode) != MODE_INT)
+  if (!is_int_mode (mode, &int_mode))
     return false;
 
-  width = GET_MODE_PRECISION (mode);
+  width = GET_MODE_PRECISION (int_mode);
   if (width == 0)
     return false;
 
@@ -129,15 +130,16 @@ bool
 val_signbit_p (machine_mode mode, unsigned HOST_WIDE_INT val)
 {
   unsigned int width;
+  scalar_int_mode int_mode;
 
-  if (GET_MODE_CLASS (mode) != MODE_INT)
+  if (!is_int_mode (mode, &int_mode))
     return false;
 
-  width = GET_MODE_PRECISION (mode);
+  width = GET_MODE_PRECISION (int_mode);
   if (width == 0 || width > HOST_BITS_PER_WIDE_INT)
     return false;
 
-  val &= GET_MODE_MASK (mode);
+  val &= GET_MODE_MASK (int_mode);
   return val == (HOST_WIDE_INT_1U << (width - 1));
 }
 
@@ -148,10 +150,11 @@ val_signbit_known_set_p (machine_mode mode, unsigned HOST_WIDE_INT val)
 {
   unsigned int width;
 
-  if (GET_MODE_CLASS (mode) != MODE_INT)
+  scalar_int_mode int_mode;
+  if (!is_int_mode (mode, &int_mode))
     return false;
 
-  width = GET_MODE_PRECISION (mode);
+  width = GET_MODE_PRECISION (int_mode);
   if (width == 0 || width > HOST_BITS_PER_WIDE_INT)
     return false;
 
@@ -166,10 +169,11 @@ val_signbit_known_clear_p (machine_mode mode, unsigned HOST_WIDE_INT val)
 {
   unsigned int width;
 
-  if (GET_MODE_CLASS (mode) != MODE_INT)
+  scalar_int_mode int_mode;
+  if (!is_int_mode (mode, &int_mode))
     return false;
 
-  width = GET_MODE_PRECISION (mode);
+  width = GET_MODE_PRECISION (int_mode);
   if (width == 0 || width > HOST_BITS_PER_WIDE_INT)
     return false;
 
@@ -4828,18 +4832,19 @@ simplify_relational_operation_1 (enum rtx_code code, machine_mode mode,
 
   /* (ne:SI (zero_extract:SI FOO (const_int 1) BAR) (const_int 0))) is
      the same as (zero_extract:SI FOO (const_int 1) BAR).  */
+  scalar_int_mode int_mode;
   if (code == NE
       && op1 == const0_rtx
-      && GET_MODE_CLASS (mode) == MODE_INT
+      && is_int_mode (mode, &int_mode)
       && cmp_mode != VOIDmode
       /* ??? Work-around BImode bugs in the ia64 backend.  */
-      && mode != BImode
+      && int_mode != BImode
       && cmp_mode != BImode
       && nonzero_bits (op0, cmp_mode) == 1
       && STORE_FLAG_VALUE == 1)
-    return GET_MODE_SIZE (mode) > GET_MODE_SIZE (cmp_mode)
-	   ? simplify_gen_unary (ZERO_EXTEND, mode, op0, cmp_mode)
-	   : lowpart_subreg (mode, op0, cmp_mode);
+    return GET_MODE_SIZE (int_mode) > GET_MODE_SIZE (cmp_mode)
+	   ? simplify_gen_unary (ZERO_EXTEND, int_mode, op0, cmp_mode)
+	   : lowpart_subreg (int_mode, op0, cmp_mode);
 
   /* (eq/ne (xor x y) 0) simplifies to (eq/ne x y).  */
   if ((code == EQ || code == NE)
diff --git a/gcc/tree.c b/gcc/tree.c
index cbb770f..c361834 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -12634,10 +12634,10 @@ vector_type_mode (const_tree t)
       && (!targetm.vector_mode_supported_p (mode)
 	  || !have_regs_of_mode[mode]))
     {
-      machine_mode innermode = TREE_TYPE (t)->type_common.mode;
+      scalar_int_mode innermode;
 
       /* For integers, try mapping it to a same-sized scalar mode.  */
-      if (GET_MODE_CLASS (innermode) == MODE_INT)
+      if (is_int_mode (TREE_TYPE (t)->type_common.mode, &innermode))
 	{
 	  unsigned int size = (TYPE_VECTOR_SUBPARTS (t)
 			       * GET_MODE_BITSIZE (innermode));