[gcc(refs/vendors/riscv/heads/gcc-15-with-riscv-opts)] RISC-V: Leverage get_vector_binary_rtx_cost to avoid code dup [NFC]

[Jeff Law via Gcc-cvs]

https://gcc.gnu.org/g:90c842426e9fe9ce043d351d62888cf9299cf4b6

commit 90c842426e9fe9ce043d351d62888cf9299cf4b6
Author: Pan Li <pan2...@intel.com>
Date:   Wed Jun 4 11:06:52 2025 +0800

    RISC-V: Leverage get_vector_binary_rtx_cost to avoid code dup [NFC]
    
    Some similar code could be wrapped to func get_vector_binary_rtx_cost,
    thus leverage this function to avoid code duplication.
    
    The below test suites are passed for this patch series.
    * The rv64gcv fully regression test.
    
    gcc/ChangeLog:
    
            * config/riscv/riscv.cc (get_vector_binary_rtx_cost): Rename
            the args to scalar2vr.
            (riscv_rtx_costs): Leverage above func to avoid code dup.
    
    Signed-off-by: Pan Li <pan2...@intel.com>
    (cherry picked from commit a8b38447efe2c74094b865e1cc44723659dac2e4)

Diff:
---
 gcc/config/riscv/riscv.cc | 44 ++++++++++++++++----------------------------
 1 file changed, 16 insertions(+), 28 deletions(-)

diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index b168a6414988..3254ec9f9e13 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -3892,11 +3892,11 @@ riscv_extend_cost (rtx op, bool unsigned_p)
 }
 
 /* Return the cost of the vector binary rtx like add, minus, mult.
-   The cost of gr2vr will be appended if there one of the op comes
-   from the VEC_DUPLICATE.  */
+   The cost of scalar2vr_cost will be appended if there one of the
+   op comes from the VEC_DUPLICATE.  */
 
 static int
-get_vector_binary_rtx_cost (rtx x, int gr2vr_cost)
+get_vector_binary_rtx_cost (rtx x, int scalar2vr_cost)
 {
   gcc_assert (riscv_v_ext_mode_p (GET_MODE (x)));
 
@@ -3905,7 +3905,7 @@ get_vector_binary_rtx_cost (rtx x, int gr2vr_cost)
 
   if (GET_CODE (op_0) == VEC_DUPLICATE
       || GET_CODE (op_1) == VEC_DUPLICATE)
-    return (gr2vr_cost + 1) * COSTS_N_INSNS (1);
+    return (scalar2vr_cost + 1) * COSTS_N_INSNS (1);
   else
     return COSTS_N_INSNS (1);
 }
@@ -3924,6 +3924,8 @@ riscv_rtx_costs (rtx x, machine_mode mode, int 
outer_code, int opno ATTRIBUTE_UN
     {
       int gr2vr_cost = get_gr2vr_cost ();
       int fr2vr_cost = get_fr2vr_cost ();
+      int scalar2vr_cost = FLOAT_MODE_P (GET_MODE_INNER (mode))
+       ? fr2vr_cost : gr2vr_cost;
 
       switch (outer_code)
        {
@@ -3936,12 +3938,12 @@ riscv_rtx_costs (rtx x, machine_mode mode, int 
outer_code, int opno ATTRIBUTE_UN
                break;
              case IF_THEN_ELSE:
                {
-                 rtx op_1 = XEXP (x, 1);
+                 rtx op = XEXP (x, 1);
 
-                 switch (GET_CODE (op_1))
+                 switch (GET_CODE (op))
                    {
                    case DIV:
-                     *total = get_vector_binary_rtx_cost (op_1, gr2vr_cost);
+                     *total = get_vector_binary_rtx_cost (op, scalar2vr_cost);
                      break;
                    default:
                      *total = COSTS_N_INSNS (1);
@@ -3956,31 +3958,17 @@ riscv_rtx_costs (rtx x, machine_mode mode, int 
outer_code, int opno ATTRIBUTE_UN
              case XOR:
              case MULT:
                {
+                 rtx op;
                  rtx op_0 = XEXP (x, 0);
                  rtx op_1 = XEXP (x, 1);
-                 rtx op;
 
-                 if (GET_CODE (op_0) == VEC_DUPLICATE
-                     || GET_CODE (op_1) == VEC_DUPLICATE)
-                   {
-                     *total = (gr2vr_cost + 1) * COSTS_N_INSNS (1);
-                     break;
-                   }
-                 else if (GET_CODE (op = op_0) == MULT
-                          || GET_CODE (op = op_1) == MULT)
-                   {
-                     rtx mult_op0 = XEXP (op, 0);
-                     if (GET_CODE (mult_op0) == VEC_DUPLICATE)
-                       {
-                         if (FLOAT_MODE_P (mode))
-                           *total = (fr2vr_cost + 1) * COSTS_N_INSNS (1);
-                         else
-                           *total = (gr2vr_cost + 1) * COSTS_N_INSNS (1);
-                         break;
-                       }
-                   }
+                 if (GET_CODE (op = op_0) == MULT
+                     || GET_CODE (op = op_1) == MULT)
+                   *total = get_vector_binary_rtx_cost (op, scalar2vr_cost);
+                 else
+                   *total = get_vector_binary_rtx_cost (x, scalar2vr_cost);
                }
-               /* Fall through.  */
+               break;
              default:
                *total = COSTS_N_INSNS (1);
                break;