ac/nir: fix translation of nir_op_frcp for doubles

Without this we end up with the llvm error message:

"Both operands to a binary operator are not of the same type!"

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>

src/amd/common/ac_nir_to_llvm.c

@@ -1715,7 +1715,8 @@ static void visit_alu(struct ac_nir_context *ctx, const nir_alu_instr *instr)
 		break;
 	case nir_op_frcp:
 		src[0] = ac_to_float(&ctx->ac, src[0]);
-		result = ac_build_fdiv(&ctx->ac, ctx->ac.f32_1, src[0]);
+		result = ac_build_fdiv(&ctx->ac, instr->dest.dest.ssa.bit_size == 32 ? ctx->ac.f32_1 : ctx->ac.f64_1,
+				       src[0]);
 		break;
 	case nir_op_iand:
 		result = LLVMBuildAnd(ctx->ac.builder, src[0], src[1], "");