{
register unsigned int i, j;
register unsigned int /* enum machine_mode */ m;
+ char contains_reg_of_mode [N_REG_CLASSES] [MAX_MACHINE_MODE];
+ char allocatable_regs_of_mode [MAX_MACHINE_MODE];
/* This macro allows the fixed or call-used registers
and the register classes to depend on target flags. */
if (CLASS_LIKELY_SPILLED_P (REGNO_REG_CLASS (i)))
SET_HARD_REG_BIT (losing_caller_save_reg_set, i);
}
+ memset (contains_reg_of_mode, 0, sizeof (contains_reg_of_mode));
+ memset (allocatable_regs_of_mode, 0, sizeof (allocatable_regs_of_mode));
+ for (m = 0; m < MAX_MACHINE_MODE; m++)
+ for (i = 0; i < N_REG_CLASSES; i++)
+ for (j = 0; j < FIRST_PSEUDO_REGISTER; j++)
+ if (!fixed_regs [j] && TEST_HARD_REG_BIT (reg_class_contents[i], j)
+ && HARD_REGNO_MODE_OK (j, m))
+ {
+ contains_reg_of_mode [i][m] = 1;
+ allocatable_regs_of_mode [m] = 1;
+ break;
+ }
/* Initialize the move cost table. Find every subset of each class
and take the maximum cost of moving any subset to any other. */
for (m = 0; m < MAX_MACHINE_MODE; m++)
- for (i = 0; i < N_REG_CLASSES; i++)
- for (j = 0; j < N_REG_CLASSES; j++)
- {
- int cost = i == j ? 2 : REGISTER_MOVE_COST (m, i, j);
- enum reg_class *p1, *p2;
-
- for (p2 = ®_class_subclasses[j][0]; *p2 != LIM_REG_CLASSES; p2++)
- if (*p2 != i)
- cost = MAX (cost, REGISTER_MOVE_COST (m, i, *p2));
-
- for (p1 = ®_class_subclasses[i][0]; *p1 != LIM_REG_CLASSES; p1++)
- {
- if (*p1 != j)
- cost = MAX (cost, REGISTER_MOVE_COST (m, *p1, j));
-
- for (p2 = ®_class_subclasses[j][0];
- *p2 != LIM_REG_CLASSES; p2++)
- if (*p1 != *p2)
- cost = MAX (cost, REGISTER_MOVE_COST (m, *p1, *p2));
- }
-
- move_cost[m][i][j] = cost;
-
- if (reg_class_subset_p (i, j))
- may_move_in_cost[m][i][j] = 0;
- else
- may_move_in_cost[m][i][j] = cost;
-
- if (reg_class_subset_p (j, i))
- may_move_out_cost[m][i][j] = 0;
+ if (allocatable_regs_of_mode [m])
+ {
+ for (i = 0; i < N_REG_CLASSES; i++)
+ if (contains_reg_of_mode [i][m])
+ for (j = 0; j < N_REG_CLASSES; j++)
+ {
+ int cost;
+ enum reg_class *p1, *p2;
+
+ if (!contains_reg_of_mode [j][m])
+ {
+ move_cost[m][i][j] = 65536;
+ may_move_in_cost[m][i][j] = 65536;
+ may_move_out_cost[m][i][j] = 65536;
+ }
+ else
+ {
+ cost = i == j ? 2 : REGISTER_MOVE_COST (m, i, j);
+
+ for (p2 = ®_class_subclasses[j][0];
+ *p2 != LIM_REG_CLASSES;
+ p2++)
+ if (*p2 != i && contains_reg_of_mode [*p2][m])
+ cost = MAX (cost, move_cost [m][i][*p2]);
+
+ for (p1 = ®_class_subclasses[i][0];
+ *p1 != LIM_REG_CLASSES;
+ p1++)
+ if (*p1 != j && contains_reg_of_mode [*p1][m])
+ cost = MAX (cost, move_cost [m][*p1][j]);
+
+ move_cost[m][i][j] = cost;
+
+ if (reg_class_subset_p (i, j))
+ may_move_in_cost[m][i][j] = 0;
+ else
+ may_move_in_cost[m][i][j] = cost;
+
+ if (reg_class_subset_p (j, i))
+ may_move_out_cost[m][i][j] = 0;
+ else
+ may_move_out_cost[m][i][j] = cost;
+ }
+ }
else
- may_move_out_cost[m][i][j] = cost;
- }
+ for (j = 0; j < N_REG_CLASSES; j++)
+ {
+ move_cost[m][i][j] = 65536;
+ may_move_in_cost[m][i][j] = 65536;
+ may_move_out_cost[m][i][j] = 65536;
+ }
+ }
#ifdef CLASS_CANNOT_CHANGE_MODE
{
/* Maximum number of parallel sets and clobbers in any insn in this fn.
Always at least 3, since the combiner could put that many together
- and we want this to remain correct for all the remaining passes. */
+ and we want this to remain correct for all the remaining passes.
+ This corresponds to the maximum number of times note_stores will call
+ a function for any insn. */
int max_parallel;
+/* Used as a temporary to record the largest number of registers in
+ PARALLEL in a SET_DEST. This is added to max_parallel. */
+
+static int max_set_parallel;
+
void
reg_scan (f, nregs, repeat)
rtx f;
allocate_reg_info (nregs, TRUE, FALSE);
max_parallel = 3;
+ max_set_parallel = 0;
for (insn = f; insn; insn = NEXT_INSN (insn))
if (GET_CODE (insn) == INSN
if (REG_NOTES (insn))
reg_scan_mark_refs (REG_NOTES (insn), insn, 1, 0);
}
+
+ max_parallel += max_set_parallel;
}
/* Update 'regscan' information by looking at the insns
dest = XEXP (dest, 0))
;
+ /* For a PARALLEL, record the number of things (less the usual one for a
+ SET) that are set. */
+ if (GET_CODE (dest) == PARALLEL)
+ max_set_parallel = MAX (max_set_parallel, XVECLEN (dest, 0) - 1);
+
if (GET_CODE (dest) == REG
&& REGNO (dest) >= min_regno)
REG_N_SETS (REGNO (dest))++;