Hi,
Next, costs for SYMBOL_REF, HIGH and LO_SUM.
Tested in series on aarch64-none-elf.
OK for Stage-1?
Thanks,
James
---
2014-03-27 James Greenhalgh <james.greenha...@arm.com>
* config/aarch64/aarch64.c (aarch64_rtx_costs): Cost SYMBOL_REF,
HIGH, LO_SUM.
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 7a6255b..8ebb3d0 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -5455,15 +5455,44 @@ cost_plus:
return false; /* All arguments need to be in registers. */
}
- case HIGH:
- if (!CONSTANT_P (XEXP (x, 0)))
- *cost += rtx_cost (XEXP (x, 0), HIGH, 0, speed);
+ case SYMBOL_REF:
+
+ if (aarch64_cmodel == AARCH64_CMODEL_LARGE)
+ {
+ /* LDR. */
+ if (speed)
+ *cost += extra_cost->ldst.load;
+ }
+ else if (aarch64_cmodel == AARCH64_CMODEL_SMALL
+ || aarch64_cmodel == AARCH64_CMODEL_SMALL_PIC)
+ {
+ /* ADRP, followed by ADD. */
+ *cost += COSTS_N_INSNS (1);
+ if (speed)
+ *cost += 2 * extra_cost->alu.arith;
+ }
+ else if (aarch64_cmodel == AARCH64_CMODEL_TINY
+ || aarch64_cmodel == AARCH64_CMODEL_TINY_PIC)
+ {
+ /* ADR. */
+ if (speed)
+ *cost += extra_cost->alu.arith;
+ }
+
+ if (flag_pic)
+ {
+ /* One extra load instruction, after accessing the GOT. */
+ *cost += COSTS_N_INSNS (1);
+ if (speed)
+ *cost += extra_cost->ldst.load;
+ }
return true;
+ case HIGH:
case LO_SUM:
- if (!CONSTANT_P (XEXP (x, 1)))
- *cost += rtx_cost (XEXP (x, 1), LO_SUM, 1, speed);
- *cost += rtx_cost (XEXP (x, 0), LO_SUM, 0, speed);
+ /* ADRP/ADD (immediate). */
+ if (speed)
+ *cost += extra_cost->alu.arith;
return true;
case ZERO_EXTRACT:
