gcc/gcc/ira.c

40      o *Allocno class* is a register class used for allocation of
70          live ranges are used to find conflicts between allocnos.
73          region representation.  The later is used during the reload
87          full cost is used.  Initially, a hard-register's full cost is
114      o *Copy*.  Allocnos can be connected by copies.  Copies are used
139    as though the allocation used only one region which is the entire
186          used to figure out trivial colorability of allocnos.  The
207          above tree of hard register sets is used.  To get an idea how
216 	 To get an idea of the used trivial colorability criterion, it
220 	 approach and approach used in IRA is that Smith's approach
258          When default regional allocation algorithm is used
297        regional allocation algorithm is used and the register pressure
334    -fira-algorithm=CB is used), we have classic Chaitin-Briggs
432 /* A modified value of flag `-fira-verbose' used internally.  */
442    stack slots used in current function so far.  */
464 /* Temporary hard reg set used for a different calculation.  */
622 	    /* Costs for NO_REGS are used in cost calculation on the
678 /* Obstack used for storing all dynamic data (except bitmaps) of the
683 /* Obstack used for storing all bitmaps of the IRA.  */
997    be used for allocation, e.g. x86 port in 32-bit mode can not use
1006    such calculation.  Register classes used in the cost calculation
1055   /* Set up classes which can be used for allocnos as classes
1102    given by array CLASSES of length CLASSES_NUM.  The function is used
1189 /* The function used to sort the important classes.  */
2121 		/* Don't change hard registers used by a call.  */
2358 	error ("%s cannot be used in asm here",
2371     error ("%s cannot be used in asm here",
2385     error ("%s cannot be used in asm here", reg_names[FRAME_POINTER_REGNUM]);
2395    used to map pseudo regs into hardware regs.
2402 /* Set up REG_RENUMBER and CALLER_SAVE_NEEDED (used by reload) from
2635    point of any move containing such registers. This function is used
2852    It is used to decide when stack slot sharing is worth to do.  */
2962   /* Loop depth is used to recognize equivalences which appear
2999    MEMREF.  MEMREF is invalidated by modifying a register used in MEMREF,
3026       /* This used to ignore readonly memory and const/pure calls.  The problem
3102 /* Returns nonzero if X (used to initialize register REGNO) is movable.
3307    assignment - a SET, CLOBBER or REG_INC note.  It is currently not used,
3392   /* Use pdx_subregs to show whether a reg is used in a paradoxical
3401   /* Scan insns and set pdx_subregs[regno] if the reg is used in a
3591 	     of that register.  Record this insn if the register is only used once
3601 	     a register used only in one basic block from a MEM.  If so, and the
3635 		     set once and used once, indicate that the reference may be
3637 		     even if the register is only used in one block so that
3639 		     used in a different block (i.e. HIGH / LO_SUM sequences)
3675       /* If this sets a MEM to the contents of a REG that is only used
3721      registers only used that once.  If so, see if we can replace the
3767 		     once and used once.  (If it were only set, but
3768 		     not used, flow would have deleted the setting
4077      chance to get hard-registers in the reload when IRA is used.  */
4123   /* live_subregs is a vector used to keep accurate information about
4126      entry for a particular pseudo is only used if the corresponding
4490    register pressure, and whose result is not used immediately.  If it is
4529   bitmap_head live, used, set, interesting, unusable_as_input;
4542   bitmap_initialize (&used, 0);
4560       bitmap_clear (&used);
4581 		bitmap_set_bit (&used, regno);
4588 		bitmap_set_bit (&used, regno);
4604   bitmap_clear (&used);
5231   /* DF_LIVE can't be used in the register allocator, too many other
5547   /* Diagnose uses of the hard frame pointer when it is used as a global