aco: fix i2i64

Fixes: 93c8ebfa ('aco: Initial commit of independent AMD compiler')
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>

src/amd/compiler/aco_instruction_selection.cpp

@@ -2033,8 +2033,12 @@ void visit_alu_instr(isel_context *ctx, nir_alu_instr *instr)
    }
    case nir_op_i2i64: {
       Temp src = get_alu_src(ctx, instr->src[0]);
-      if (instr->src[0].src.ssa->bit_size == 32) {
-         bld.pseudo(aco_opcode::p_create_vector, Definition(dst), src, Operand(0u));
+      if (src.regClass() == s1) {
+         Temp high = bld.sopc(aco_opcode::s_ashr_i32, bld.def(s1, scc), src, Operand(31u));
+         bld.pseudo(aco_opcode::p_create_vector, Definition(dst), src, high);
+      } else if (src.regClass() == v1) {
+         Temp high = bld.vop2(aco_opcode::v_ashrrev_i32, bld.def(v1), Operand(31u), src);
+         bld.pseudo(aco_opcode::p_create_vector, Definition(dst), src, high);
       } else {
          fprintf(stderr, "Unimplemented NIR instr bit size: ");
          nir_print_instr(&instr->instr, stderr);