gcc/gcc/combine.c

6141   enum machine_mode tmode = mode_for_size (len, MODE_INT, 1);
6198   if (tmode != BLKmode
6199       && ! (spans_byte && inner_mode != tmode)
6204 		   && have_insn_for (STRICT_LOW_PART, tmode))))
6207 		  % (STRICT_ALIGNMENT ? GET_MODE_ALIGNMENT (tmode)
6211 	      && GET_MODE_BITSIZE (inner_mode) >= GET_MODE_BITSIZE (tmode)
6212 	      && (inner_mode == tmode
6233 	  new = adjust_address_nv (inner, tmode, offset);
6239 	  if (tmode != inner_mode)
6246 			       - GET_MODE_SIZE (tmode))
6251 		  GET_MODE_SIZE (inner_mode) > GET_MODE_SIZE (tmode))
6253 			       - GET_MODE_SIZE (tmode)) % UNITS_PER_WORD;
6260 	      new = gen_rtx_SUBREG (tmode, inner, final_word);
6266 	new = force_to_mode (inner, tmode,
6278 		   ? gen_rtx_CLOBBER (tmode, const0_rtx)
6281       if (mode == tmode)
6291 	  && (GET_MODE_BITSIZE (tmode) <= HOST_BITS_PER_WIDE_INT
6292 	      && ((nonzero_bits (new, tmode)
6294 			GET_MODE_MASK (tmode))
9316   enum machine_mode shift_mode, tmode;
9457 	      && (tmode = mode_for_size (GET_MODE_BITSIZE (mode) - count,
9460 	      new = adjust_address_nv (varop, tmode,
9477 	      && (tmode = mode_for_size (GET_MODE_BITSIZE (mode) - count,
9479 	      && tmode == GET_MODE (XEXP (varop, 0)))
10344   enum machine_mode mode, tmode;
10456 	    for (tmode = GET_CLASS_NARROWEST_MODE
10458 		 tmode != GET_MODE (op0); tmode = GET_MODE_WIDER_MODE (tmode))
10459 	      if ((unsigned HOST_WIDE_INT) c0 == GET_MODE_MASK (tmode))
10461 		  op0 = gen_lowpart_for_combine (tmode, inner_op0);
10462 		  op1 = gen_lowpart_for_combine (tmode, inner_op1);
11154 	      && (tmode = mode_for_size (i, MODE_INT, 1)) != BLKmode)
11156 	      op0 = gen_lowpart_for_combine (tmode, XEXP (op0, 0));
11298 	      && (tmode = mode_for_size (mode_width - INTVAL (XEXP (op0, 1)),
11301 		   + (GET_MODE_MASK (tmode) >> 1) + 1)
11302 		  <= GET_MODE_MASK (tmode)))
11304 	      op0 = gen_lowpart_for_combine (tmode, XEXP (XEXP (op0, 0), 0));
11317 	      && (tmode = mode_for_size (mode_width - INTVAL (XEXP (op0, 1)),
11320 		   + (GET_MODE_MASK (tmode) >> 1) + 1)
11321 		  <= GET_MODE_MASK (tmode)))
11328 	      op0 = gen_binary (PLUS, tmode,
11329 				gen_lowpart_for_combine (tmode, inner),
11448     for (tmode = GET_MODE_WIDER_MODE (mode);
11449 	 (tmode != VOIDmode
11450 	  && GET_MODE_BITSIZE (tmode) <= HOST_BITS_PER_WIDE_INT);
11451 	 tmode = GET_MODE_WIDER_MODE (tmode))
11452       if (have_insn_for (COMPARE, tmode))
11463 			   && (nonzero_bits (op0, tmode)
11466 				|| (nonzero_bits (op1, tmode)
11470 	      || ((num_sign_bit_copies (op0, tmode)
11471 		   > (unsigned int) (GET_MODE_BITSIZE (tmode)
11473 		  && (num_sign_bit_copies (op1, tmode)
11474 		      > (unsigned int) (GET_MODE_BITSIZE (tmode)
11481 		op0 = gen_binary (AND, tmode,
11482 				  gen_lowpart_for_combine (tmode,
11484 				  gen_lowpart_for_combine (tmode,
11487 	      op0 = gen_lowpart_for_combine (tmode, op0);
11490 	      op1 = gen_lowpart_for_combine (tmode, op1);
11500 	      op0 = gen_binary (AND, tmode,
11501 				gen_lowpart_for_combine (tmode, op0),