[AArch64 costs 17/18] Cost for SYMBOL_REF, HIGH and LO_SUM

[gcc.git] / gcc / config / aarch64 / aarch64.c

diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 58627b5e4cec0395a3ec1e50a0f1ead3ba933392..9eff2fd8e6ad332bc239ec353d79917bbfd2ed29 100644 (file)
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -5508,15 +5508,44 @@ 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: