[PATCH] LoongArch: Don't use C++17 feature [PR119238]

[Xi Ruoyao]

Structured binding is a C++17 feature but the GCC code base is in C++14.

gcc/ChangeLog:

        PR target/119238
        * config/loongarch/simd.md (<su>dot_prod<wvec_half><mode>):
        Stop using structured binding.
---

Ok for trunk?

 gcc/config/loongarch/simd.md | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/gcc/config/loongarch/simd.md b/gcc/config/loongarch/simd.md
index 8f7e912982e..dd17cd13fc5 100644
--- a/gcc/config/loongarch/simd.md
+++ b/gcc/config/loongarch/simd.md
@@ -809,18 +809,20 @@ (define_expand "<su>dot_prod<wvec_half><mode>"
    (any_extend (const_int 0))]
   ""
 {
-  auto [op0, op1, op2, op3] = operands;
+  rtx *op = operands;
 
-  if (op3 == CONST0_RTX (<WVEC_HALF>mode))
+  if (op[3] == CONST0_RTX (<WVEC_HALF>mode))
     emit_insn (
-      gen_<simd_isa>_<x>vmulwev_<simdfmt_w>_<simdfmt><u> (op0, op1, op2));
+      gen_<simd_isa>_<x>vmulwev_<simdfmt_w>_<simdfmt><u> (op[0], op[1],
+                                                         op[2]));
   else
     emit_insn (
-      gen_<simd_isa>_<x>vmaddwev_<simdfmt_w>_<simdfmt><u> (op0, op3, op1,
-                                                          op2));
+      gen_<simd_isa>_<x>vmaddwev_<simdfmt_w>_<simdfmt><u> (op[0], op[3],
+                                                          op[1], op[2]));
 
   emit_insn (
-    gen_<simd_isa>_<x>vmaddwod_<simdfmt_w>_<simdfmt><u> (op0, op0, op1, op2));
+    gen_<simd_isa>_<x>vmaddwod_<simdfmt_w>_<simdfmt><u> (op[0], op[0],
+                                                        op[1], op[2]));
   DONE;
 })
 
-- 
2.48.1