[gcc r16-3148] aarch64: Consider TARGET_CMPBR in rtx costs

[Richard Henderson via Gcc-cvs]

https://gcc.gnu.org/g:2af897e11b358fccb978e3a96b2899ce193bcd25

commit r16-3148-g2af897e11b358fccb978e3a96b2899ce193bcd25
Author: Richard Henderson <richard.hender...@linaro.org>
Date:   Mon Aug 4 22:47:05 2025 +1000

    aarch64: Consider TARGET_CMPBR in rtx costs
    
    gcc:
            * config/aarch64/aarch64.cc (aarch64_if_then_else_costs):
            Use aarch64_cb_rhs to match CB insns.

Diff:
---
 gcc/config/aarch64/aarch64.cc | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc
index d5272294f0a0..e4a9e876e7f2 100644
--- a/gcc/config/aarch64/aarch64.cc
+++ b/gcc/config/aarch64/aarch64.cc
@@ -14460,6 +14460,15 @@ aarch64_if_then_else_costs (rtx op0, rtx op1, rtx op2, 
int *cost, bool speed)
            *cost += extra_cost->alu.arith * 2;
          return true;
        }
+
+      if (TARGET_CMPBR)
+       {
+         *cost += rtx_cost (inner, cmpmode, cmpcode, 0, speed);
+         if ((cmpmode != SImode && cmpmode != DImode)
+             || !aarch64_cb_rhs (cmpcode, comparator))
+           *cost += rtx_cost (comparator, cmpmode, cmpcode, 1, speed);
+         return true;
+       }
     }
   else if (GET_MODE_CLASS (GET_MODE (inner)) == MODE_CC)
     {