* defaults.h (HONOR_REG_ALLOC_ORDER): Change HONOR_REG_ALLOC_ORDER
to a C expression marco.
* ira-color.c (HONOR_REG_ALLOC_ORDER) : Ditto.
* config/arm/arm.h (HONOR_REG_ALLOC_ORDER): Ditto.
* config/nds32/nds32.h (HONOR_REG_ALLOC_ORDER): Ditto.
* doc/tm.texi (HONOR_REG_ALLOC_ORDER): Update document for
HONOR_REG_ALLOC_ORDER.
* doc/tm.texi.in (HONOR_REG_ALLOC_ORDER): Ditto.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@210000
138bc75d-0d04-0410-961f-
82ee72b054a4
+2014-02-26 Kito Cheng <kito@0xlab.org>
+
+ * defaults.h (HONOR_REG_ALLOC_ORDER): Change HONOR_REG_ALLOC_ORDER
+ to a C expression marco.
+ * ira-color.c (HONOR_REG_ALLOC_ORDER) : Ditto.
+ * config/arm/arm.h (HONOR_REG_ALLOC_ORDER): Ditto.
+ * config/nds32/nds32.h (HONOR_REG_ALLOC_ORDER): Ditto.
+ * doc/tm.texi (HONOR_REG_ALLOC_ORDER): Update document for
+ HONOR_REG_ALLOC_ORDER.
+ * doc/tm.texi.in (HONOR_REG_ALLOC_ORDER): Ditto.
+
2014-05-01 Jan-Benedict Glaw <jbglaw@lug-owl.de>
* config/arc/arc.c (TARGET_LRA_P): Undef before redefine.
/* Tell IRA to use the order we define rather than messing it up with its
own cost calculations. */
-#define HONOR_REG_ALLOC_ORDER
+#define HONOR_REG_ALLOC_ORDER 1
/* Interrupt functions can only use registers that have already been
saved by the prologue, even if they would normally be
/* Tell IRA to use the order we define rather than messing it up with its
own cost calculations. */
-#define HONOR_REG_ALLOC_ORDER
+#define HONOR_REG_ALLOC_ORDER 1
/* The number of consecutive hard regs needed starting at
reg "regno" for holding a value of mode "mode". */
#define LOCAL_REGNO(REGNO) 0
#endif
+#ifndef HONOR_REG_ALLOC_ORDER
+#define HONOR_REG_ALLOC_ORDER 0
+#endif
+
/* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
the stack pointer does not matter. The value is tested only in
functions that have frame pointers. */
prologue and restoring it in the epilogue. This discourages it from
using call-saved registers. If a machine wants to ensure that IRA
allocates registers in the order given by REG_ALLOC_ORDER even if some
-call-saved registers appear earlier than call-used ones, this macro
-should be defined.
+call-saved registers appear earlier than call-used ones, then define this
+macro as a C expression to nonzero. Default is 0.
@end defmac
@defmac IRA_HARD_REGNO_ADD_COST_MULTIPLIER (@var{regno})
prologue and restoring it in the epilogue. This discourages it from
using call-saved registers. If a machine wants to ensure that IRA
allocates registers in the order given by REG_ALLOC_ORDER even if some
-call-saved registers appear earlier than call-used ones, this macro
-should be defined.
+call-saved registers appear earlier than call-used ones, then define this
+macro as a C expression to nonzero. Default is 0.
@end defmac
@defmac IRA_HARD_REGNO_ADD_COST_MULTIPLIER (@var{regno})
}
return j == nregs;
}
-#ifndef HONOR_REG_ALLOC_ORDER
/* Return number of registers needed to be saved and restored at
function prologue/epilogue if we allocate HARD_REGNO to hold value
nregs++;
return nregs;
}
-#endif
/* Choose a hard register for allocno A. If RETRY_P is TRUE, it means
that the function called from function
enum reg_class aclass;
enum machine_mode mode;
static int costs[FIRST_PSEUDO_REGISTER], full_costs[FIRST_PSEUDO_REGISTER];
-#ifndef HONOR_REG_ALLOC_ORDER
int saved_nregs;
enum reg_class rclass;
int add_cost;
-#endif
#ifdef STACK_REGS
bool no_stack_reg_p;
#endif
continue;
cost = costs[i];
full_cost = full_costs[i];
-#ifndef HONOR_REG_ALLOC_ORDER
- if ((saved_nregs = calculate_saved_nregs (hard_regno, mode)) != 0)
- /* We need to save/restore the hard register in
- epilogue/prologue. Therefore we increase the cost. */
+ if (!HONOR_REG_ALLOC_ORDER)
{
- rclass = REGNO_REG_CLASS (hard_regno);
- add_cost = ((ira_memory_move_cost[mode][rclass][0]
- + ira_memory_move_cost[mode][rclass][1])
- * saved_nregs / hard_regno_nregs[hard_regno][mode] - 1);
- cost += add_cost;
- full_cost += add_cost;
+ if ((saved_nregs = calculate_saved_nregs (hard_regno, mode)) != 0)
+ /* We need to save/restore the hard register in
+ epilogue/prologue. Therefore we increase the cost. */
+ {
+ rclass = REGNO_REG_CLASS (hard_regno);
+ add_cost = ((ira_memory_move_cost[mode][rclass][0]
+ + ira_memory_move_cost[mode][rclass][1])
+ * saved_nregs / hard_regno_nregs[hard_regno][mode] - 1);
+ cost += add_cost;
+ full_cost += add_cost;
+ }
}
-#endif
if (min_cost > cost)
min_cost = cost;
if (min_full_cost > full_cost)