RISC-V: Support (set (mem) (const_poly_int))

gcc/ChangeLog:

	* config/riscv/riscv.cc (riscv_legitimize_move): Support (set (mem) (const_poly_int)).

diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index 90a39047dd7644bca4a83a229a369d4594e24d46..53a91a1003b90dd2557738d4d1b57d6e80eff2bb 100644 (file)
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -1958,6 +1958,18 @@ riscv_legitimize_move (machine_mode mode, rtx dest, rtx src)
 {
   if (CONST_POLY_INT_P (src))
     {
+      /*
+       Handle:
+         (insn 183 182 184 6 (set (mem:QI (plus:DI (reg/f:DI 156)
+                 (const_int 96 [0x60])) [0  S1 A8])
+         (const_poly_int:QI [8, 8]))
+       "../../../../riscv-gcc/libgcc/unwind-dw2.c":1579:3 -1 (nil))
+      */
+      if (MEM_P (dest))
+       {
+         emit_move_insn (dest, force_reg (mode, src));
+         return true;
+       }
       poly_int64 value = rtx_to_poly_int64 (src);
       if (!value.is_constant () && !TARGET_VECTOR)
        {