contrib/gcc/ifcvt.c

34 #include "hard-reg-set.h"
155 	  /* If this instruction is the load or set of a "stack" register,
164 	    rtx set = single_set (insn);
165 	    if (set && STACK_REG_P (SET_DEST (set)))
1373       rtx set;
1389 	  set = single_set (tmp);
1390 	  SET_DEST (set) = a;
1398       rtx set, last;
1414 	  set = single_set (tmp);
1415 	  SET_DEST (set) = b;
1419       /* If insn to set up A clobbers any registers B depends on, try to
1484   rtx cond, set, insn;
1494   set = pc_set (if_info->jump);
1495   cond = XEXP (SET_SRC (set), 0);
1497     = GET_CODE (XEXP (SET_SRC (set), 2)) == LABEL_REF
1498       && XEXP (XEXP (SET_SRC (set), 2), 0) == JUMP_LABEL (if_info->jump);
1768       rtx set, insn = prev_nonnote_insn (earliest);
1770 	  && (set = single_set (insn))
1771 	  && rtx_equal_p (SET_DEST (set), c))
1777 	    c = SET_SRC (set);
2022   rtx cond, set, tmp;
2028   set = pc_set (jump);
2032   reverse = (GET_CODE (XEXP (SET_SRC (set), 2)) == LABEL_REF
2033 	     && XEXP (XEXP (SET_SRC (set), 2), 0) == JUMP_LABEL (jump));
2037   cond = XEXP (SET_SRC (set), 0);
2212   /* Look for the other potential set.  Make sure we've got equivalent
2294      isn't, we don't need anything but an unconditional set.  */
2408    Every insn must be a simple set of a register to a constant or a
2420       rtx set, dest, src;
2424       set = single_set (insn);
2425       if (!set)
2428       dest = SET_DEST (set);
2429       src = SET_SRC (set);
2515      is set in both blocks, and is not set to a constant in both
2516      cases, then both blocks must set it to the same register.  We
2517      have already verified that if it is set to a register, that the
2519      the number of registers set in only one of the blocks.  */
2555       rtx set, target, dest, t, e;
2560       set = single_set (insn);
2561       gcc_assert (set && REG_P (SET_DEST (set)));
2563       dest = SET_DEST (set);
2586 	  rtx set, target, dest;
2591 	  set = single_set (insn);
2592 	  gcc_assert (set && REG_P (SET_DEST (set)));
2594 	  dest = SET_DEST (set);
2597 	  /* If this register was set in the then block, we already
3408   /* Registers set are dead, or are predicable.  */
3527   /* Registers set are dead, or are predicable.  */
3689 	   MERGE_SET = set of registers set in MERGE_BB
3690 	   TEST_LIVE = set of registers live at EARLIEST
3691 	   TEST_SET  = set of registers set between EARLIEST and the
3815 	  rtx note, set;
3822 	  set = single_set (insn);
3823 	  if (!set || !function_invariant_p (SET_SRC (set)))